LCD Digital Heating Magnetic Stirrer (MS‑H280‑F250)

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The LCD Digital Heating Magnetic Stirrer (MS‑H280‑F250) is a modular, high‑safety, programmable benchtop instrument engineered for precise, safe, and versatile medium‑volume heating and stirring in clinical diagnostics, pharmaceutical quality control, analytical chemistry, mining, and academic research laboratories. Featuring an interchangeable 250 mL round‑bottom flask heating mantle precisely contoured (inner diameter 89.75 mm) for standard 250 mL borosilicate round‑bottom flasks, this instrument can be configured as a dedicated 250 mL round‑bottom flask heater, or run in three independent modes: full heating and stirring, detached as a standard 20‑litre magnetic stirrer on its Ø135 mm ceramic‑coated work plate, or as a “Two‑in‑One” system where one unit heats (using the heating mantle) while a separate, independent unit stirs (using the work plate) simultaneously. The system includes the PT1000 external temperature sensor, support rod, support clamp and magnetic stirring bar.

Every LCD Digital Heating Magnetic Stirrer (MS‑H280‑F250) features a high‑resolution LCD display showing set and actual values for temperature, speed and timer; a maintenance‑free, spark‑free brushless DC motor; and an alumina‑fibre heating mantle with aluminium‑silicate (ceramic) wool insulation for uniform heat distribution and a long service life. The instrument includes the PT1000 external temperature sensor (±0.2 °C accuracy) for precise control of the actual sample liquid temperature. A built‑in automatic temperature self‑calibration function further enhances accuracy for demanding applications. The programmable timer (1 min to 99 h 59 min) enables fully unattended, automated operation.

Key user‑focused features for medium‑volume applications include interchangeable heating mantles for 100 mL, 250 mL, 500 mL and 1000 mL round‑bottom flasks (F series) and flat‑bottom beakers (B series), arbitrarily interchangeable; true “Two‑in‑One” independent operation; and a compact 3.7 kg footprint (295 × 160 mm).

Safety is exemplary with TÜV certification (CE, cTUVus, FCC), dual independent safety circuits providing redundant over‑temperature protection (420 °C hardware cutoff), an independent residual heat warning indicator (“HOT” flashes at >50 °C and continues even after the unit is turned off, including unplugged, until the mantle is safe to touch), and IP21‑rated housing with a fire‑resistant metal outer shell. Flask‑position detection safety will stop heating if the flask is out of position, preventing unsafe “dry” heating of the mantle.

For the clinical laboratory scientist, trace element analyst, and pharmaceutical QC chemist, the MS‑H280‑F250 delivers the modular versatility, medium‑batch processing capacity, and high safety required for sample digestion for trace element analysis (blood lead, urine cadmium, heavy metals), medium‑volume organic synthesis, dissolution testing and solid‑liquid extraction. For the patient, the reliable performance of this instrument ensures that diagnostic tests and pharmaceutical products are accurate, reproducible and processed efficiently, directly supporting effective clinical decision‑making, appropriate treatment selection and patient safety.

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Description

LCD Digital Heating Magnetic Stirrer (MS-H280-F250)

PRIMARY CLINICAL & DIAGNOSTIC USES

1. Modular, High-Precision Heating for 250mL Round‑bottom Flask Clinical Preparations
Primary Use: Provides a programmable LCD digital heating magnetic stirrer with a dedicated 250 mL round‑bottom flask heating mantle, fitted with a high‑performance alumina fiber sleeve. Designed for the controlled, uniform heating and simultaneous stirring of medium‑volume patient samples, reagents, and biological specimens in clinical diagnostics, pharmaceutical research, and academic laboratories. The system features a maximum stirring capacity of 20 L (water) on its Ø135 mm ceramic‑coated aluminium work plate (when the mantle is detached), a speed range of 200–1500 rpm (±20 rpm accuracy), and a heating temperature range from 25 °C to 280 °C in 1 °C increments. The high‑resolution LCD digital display simultaneously shows set and actual values for temperature, stirring speed, and timer status.

How it helps: For the clinical chemist and laboratory scientist, the precisely contoured 250 mL round‑bottom flask heating mantle (inner diameter 89.75 mm) ensures maximum surface‑to‑flask contact, eliminating localised hot spots that could degrade heat‑sensitive clinical reagents. The intelligent interchangeable heating sleeve design allows flexible configuration with 100 mL, 250 mL, 500 mL, and 1000 mL round‑bottom flasks (F series) and flat‑bottom beakers (B series), which can be interchanged arbitrarily. The alumina silicate fiber insulation provides exceptional uniform heat distribution and corrosion resistance. The unit can be run as two independent devices – one heating (using the mantle) and one stirring (using the work plate) – simultaneously, dramatically improving instrument utilisation in lean diagnostic laboratories. For the patient receiving cell‑based therapies or pharmaceutical formulations, the reproducibility and thermal uniformity of the platform ensure consistent conditions for critical diagnostic sample preparation, supporting accurate test results and the safe development of new compounds.

2. Medium‑Volume Trace Element Digestion and Clinical Sample Preparation
Primary Use: Used for the controlled digestion of patient serum, whole blood, urine, and tissue homogenates in strong acids at temperatures up to 280 °C, prior to trace element analysis by atomic absorption spectroscopy (AAS) or inductively coupled plasma mass spectrometry (ICP‑MS). The built‑in temperature self‑calibration function and PT1000 external temperature sensor port (±0.2 °C accuracy) enable precise closed‑loop control of the actual sample temperature.

How it helps: For the trace element analyst processing medium‑volume patient samples, the 250 mL capacity is ideal for running routine clinical specimens (e.g., blood lead, urine cadmium, liver function panels) with a practical batch size. The PT1000 external temperature sensor (included with the package) enables the instrument to regulate the actual temperature of the acid digest directly (±0.2 °C accuracy), ensuring complete, uniform oxidation of organic matrices even in demanding trace element analysis applications. The integrated temperature self‑calibration function and dual independent safety circuits continuously monitor system status; if a sensor failure, over‑temperature (>420 °C), or short circuit is detected, the device stops heating, displays an error code, and cuts off power. For the patient undergoing heavy metal screening (e.g., lead, mercury, cadmium) or nutritional deficiency monitoring (zinc, copper, selenium), the accurate, controlled digestion achieved with the MS‑H280‑F250 results in precise and reliable clinical measurements, free from matrix interference, directly supporting correct diagnosis and treatment.

3. Benchtop Gel Melting, Culture Media Preparation and Clinical Quality Control
Primary Use: Enables safe, uniform heating and melting of solid or semi‑solid culture media, nutrient agars, and agarose gels directly in 250 mL round‑bottom flasks, and the preparation of temperature‑sensitive standard solutions and buffers for molecular diagnostics and clinical microbiology workflows. The heating mantle securely holds the vessel, allowing the top half to remain visible for easy monitoring of liquid level, clarity, and dissolved solids during operation.

How it helps: For the clinical molecular biologist and microbiology technologist, the 250 mL mantle capacity is ideal for preparing medium‑volume gels and media (e.g., 40–50 standard gels or 100–150 culture plates) without the need to handle oversized equipment. The glass‑fibre inner sleeve with high‑quality aluminium‑silicate wool provides superior heat retention and 500 °C thermal resistance, allowing agarose and solid media to melt evenly without localised scorching that could degrade nutrients. The integrated programmable three‑step timer (1 minute to 99 hours 59 minutes) can be set to stop heating while continuing to stir for safe unattended sample cooling. The “HOT” warning indicator activates when the heating mantle exceeds 50 °C and continues flashing even after the unit is turned off, including when unplugged, until the plate is safe to touch. For the patient, correctly prepared, homogeneous media in sufficient batch volume ensures that bacterial identification and molecular diagnostic testing for infectious diseases are accurate, timely, and reproducible across patient specimens.

4. Dual‑Mode Versatility for Pharmaceutical Quality Control and Industrial‑Scale R&D
Primary Use: Can be used in three independent configurations: as a complete heating and stirring unit (when the mantle is attached), as a stirring‑only unit on its 20‑litre capacity ceramic‑coated work plate (when the mantle is detached), or as a dual‑purpose system where one unit heats (using the mantle) while a separate, independent unit stirs (using the work plate) simultaneously.

How it helps: For the laboratory manager and R&D director, the ability to run a 250 mL synthesis on the heating mantle while simultaneously stirring a 5‑litre beaker of buffer on the work plate dramatically improves productivity. The integrated programmable three‑step timer can be set to stop heating while continuing to stir for safe unattended sample cooling. The instrument supports flexible configuration with interchangeable heating jackets for round‑bottom flasks and flat‑bottom beakers across all common volumes (100 mL to 1000 mL). A single 3.7 kg instrument can process a 250 mL batch of critical patient digest, then be reconfigured for general stirring tasks between runs – reducing equipment duplication and saving laboratory bench space. The flame‑retardant housing and TÜV certification (CE, cTUVus, FCC) and IP21 rating provide a high level of safety in busy clinical and pharmaceutical environments. For the patient, streamlined, standardised processing of QC materials means fewer procedural errors across high‑volume sample runs, supporting faster, more accurate diagnostic test results.

SECONDARY & SUPPORTIVE USES

1. Medium‑scale chemical synthesis and reflux for pharmaceutical research: Provides stable, uniform heating for distillation, reflux, and digestion of organic compounds in 250 mL round‑bottom flasks, supporting fine chemical, pharmaceutical, and educational research – with the ability to reach 280 °C for refluxing high‑boiling‑point solvents. Suitable for scientific research, industrial and mining applications, food processing, biochemistry, agriculture, petrochemistry, and pharmaceutical industries. For this purpose, an external PT1000 temperature sensor (±0.2 °C) is required.

2. Medium‑volume solvent evaporation and concentration for analytical chemistry: Gently heats organic solvents in 250 mL round‑bottom flasks to remove volatile components and concentrate non‑volatile analytes; the PT1000 external temperature sensor provides ±0.2 °C accuracy for controlled evaporation rates in environmental analysis, food safety testing, and pharmaceutical formulation development – ideal for concentrating multiple extracts where larger‑scale evaporators would waste time.

3. Dissolution testing for early‑stage drug development: Provides precise heating to simulate dissolution and stability test conditions for solid oral dosage forms (tablets, capsules) placed in a 250 mL beaker or round‑bottom flask containing heated buffer solutions. The 250 mL capacity is optimal for early‑stage formulation screening and QC testing, as it can accommodate a complete dissolution vessel with full agitation.

4. Protein denaturation and enzyme inactivation for biochemistry: Heats protein solutions in a 250 mL flask to temperatures above 70 °C to completely denature enzymes and coagulate proteins, stopping enzymatic reactions before downstream analysis in protein purification and enzyme assay workflows – conserving precious protein samples while providing full denaturation.

5. Education and teaching laboratory heating for chemistry demonstrations: Serves as a versatile, user‑friendly teaching tool for demonstrating the principles of distillation, reflux, solution preparation, and chemical reaction kinetics in university chemistry, clinical laboratory science, and pharmaceutical laboratory courses. The compact 3.7 kg benchtop design with high‑visibility LCD screen and incremental digital controls is ideal for student workstations.

6. Geochemical, mining and environmental sample preparation: Prepares solid environmental and mining samples – such as soils, sediments, rocks, and ores – by acid‑digesting or ashing them in preparation for analysis of mineral content and elemental pollutants. The high‑temperature‑capable mantle (280 °C) can handle heavy crucibles and aggressive acids, with 250 mL capacity enabling processing of representative bulk samples with high throughput.

KEY PRODUCT FEATURES

1. BASIC IDENTIFICATION ATTRIBUTES

Device Type: A modular, programmable LCD digital heating magnetic stirrer with an interchangeable 250 mL round‑bottom flask heating mantle.
Designation: MS‑H280‑F250 LCD Digital Heating Magnetic Stirrer; LCD Digital Magnetic Stirrer with Electric Heating Mantle; DLAB MS‑H280‑F250.
Catalogue Number: 8017383100.
Key Components:
- Interchangeable 250 mL round‑bottom flask heating mantle with inner diameter 89.75 mm
- Glass‑fibre and high‑quality aluminium‑silicate (ceramic) wool inner liner for uniform thermal distribution
- Aluminium‑structure heating mantle outer shell with powder‑coated, corrosion‑resistant finish
- Fire‑resistant (metal) outer housing
- Ø135 mm ceramic‑coated aluminium work plate (when mantle is detached)
- Maintenance‑free, spark‑free brushless DC motor (explosion‑proof)
- High‑resolution LCD display showing set and actual values for speed, temperature and timer
- PT1000 external temperature sensor port with sensor, support rod and clamp included with the package
- Built‑in temperature self‑calibration function (customer‑accessible)
- Programmable timer (1 minute to 99 hours 59 minutes)
- Safety lock to prevent accidental changes to operating status
- Independent “HOT” residual heat indicator (flashes when work plate temperature >50 °C, even after power off)
- Dual independent safety circuits with over‑temperature protection (420 °C hardware cutoff)
- IP21‑rated housing (protection against solids >12.5 mm and vertically falling water drops)

2. TECHNICAL & PERFORMANCE PROPERTIES

Heating mantle capacity (F250 variant): 250 mL round‑bottom flasks.
Heating mantle inner diameter (F250): 89.75 mm, precision‑contoured for optimal thermal contact with standard 250 mL round‑bottom flasks.
Mantle insulation material: High‑quality aluminium‑silicate (ceramic) wool / alumina fiber sleeve, providing uniform heating, durability and corrosion resistance.
Work plate material (when mantle detached): Ceramic‑coated aluminium (strong acid‑resistant, strong alkali‑resistant, durable, easy to clean).
Work plate dimensions (when mantle detached): Ø135 mm (5 inches).
Maximum stirring capacity (H₂O) on work plate: 20 L.
Speed range: 200–1500 rpm, adjustable.
Speed setting resolution: 1 rpm.
Speed accuracy: ±10 rpm.
Heating temperature range: Room temperature to 280 °C, adjustable in 1 °C increments.
Temperature control accuracy (plate surface): ±1 °C (<100 °C), ±1 % (>100 °C).
External temperature sensor (PT1000) accuracy: ±0.2 °C.
Temperature display accuracy: ±0.1 °C.
Timer range: 1 minute to 99 hours 59 minutes.
Number of stirring positions: 1.
Maximum stir bar length: 80 mm.
Motor type: Maintenance‑free, spark‑free brushless DC motor.
Motor input power: 1.8 W.
Heating output (mantle power): 240 W.
Total power consumption: 650 W (heating + stirring).
Over‑temperature protection: 420 °C hardware cutoff (dual independent safety circuits).
Residual heat warning: Activates above 50 °C; “HOT” flashes on screen and continues even after unit is powered off (including unplugged) until the plate cools below 50 °C.
Protection class: IP21.
Power requirements: 100–120 V / 200‑240 V, 50/60 Hz (universal input, user‑selectable by region).
Dimensions (L × W × H): 295 × 160 × 160 mm.
Weight: 3.7 kg.
Operating conditions: Ambient temperature 5–40 °C, ≤80 % relative humidity.
Certifications: TÜV‑certified (CE, cTUVus, FCC), meeting international product safety standards.

3. PHYSICAL & OPERATIONAL PROPERTIES

Construction: Durable, fire‑resistant metal outer housing with an interchangeable heating mantle. The heating mantle is constructed from a high‑quality aluminium‑silicate (ceramic) wool inner liner (alumina fiber sleeve), which provides excellent thermal insulation, uniform heating, and corrosion resistance. The aluminium‑structure mantle has a powder‑coated, corrosion‑resistant outer shell for efficient heat transfer and a long service life.
Heating mantle (F250 variant): Dedicated 250 mL round‑bottom flask heating mantle with an inner diameter of 89.75 mm, precisely contoured to maximise surface‑to‑vessel heat transfer and ensure uniform thermal contact. The alumina‑fibre sleeve allows the top half of the flask to remain visible for easy monitoring of liquid level, clarity, and dissolved solids during operation.
Flexible interchangeable heating sleeves: The driving unit can be flexibly configured with interchangeable heating jackets for 100 mL, 250 mL, 500 mL, and 1000 mL round‑bottom flasks (F series) and flat‑bottom beakers (B series), which can be interchanged arbitrarily. This modular design allows the same base unit to be reconfigured for a wide range of vessel sizes without purchasing a separate instrument.
Dual‑mode operation (“Two‑in‑One Mode”): The instrument can be used in three independent configurations:
- Mode 1 (Heating + Stirring on Mantle): The mantle provides simultaneous heating and stirring of the contents of the 250 mL round‑bottom flask.
- Mode 2 (Stirring‑Only): The mantle can be detached, and the instrument functions as a standard 20‑litre magnetic stirrer on its Ø135 mm ceramic‑coated work plate.
- Mode 3 (Dual‑purpose Operation – Heat + Stir independently): One unit heats (using the heating mantle) while a separate, independent unit stirs (using the 20‑litre capacity work plate). This offers genuine two‑device‑in‑one capability, dramatically improving laboratory productivity and instrument utilisation in lean diagnostic laboratories.
Display: High‑contrast LCD digital display simultaneously shows set and actual values for temperature and speed, as well as timer status, providing complete operational visibility at a glance without toggling options.
Operation: Simple, intuitive digital controls with tactile buttons for temperature, speed and timer programming. Incremental 1 °C temperature adjustment and 1 rpm speed resolution allow precise setting of experimental parameters.
Heating technology: PID‑controlled heating with advanced microprocessor control for stable, overshoot‑free temperature regulation with or without the external PT1000 sensor. The built‑in temperature self‑calibration function (customer‑accessible) allows the user to correct for minor temperature offsets, ensuring exceptional measurement accuracy over time.
Stirring system: Powerful rare‑earth magnets provide strong magnetic coupling, preventing stir bar decoupling even with viscous liquids or at high speeds. The brushless DC motor provides stable torque and ultra‑quiet, vibration‑free operation.
Timer function: Programmable timer from 1 minute to 99 hours 59 minutes, with buzzer alert upon completion and safety‑lock parameter‑locking function. Upon completion (timer zero), the unit stops heating but continues stirring (if stirring was enabled), allowing the sample to cool gently while remaining under agitation and preventing thermal degradation of heat‑sensitive samples.
Safety functions:
- Safety lock: Prevents accidental changes to operating status once parameters are set.
- Residual heat warning (“HOT” indicator): The “HOT” safety indicator activates when the heating mantle exceeds 50 °C and continues flashing on the display even after the unit is turned off (including unplugged). This critical safety feature alerts users to the dangerously hot surface until the plate/mantle is safe to touch (temperature drops below 50 °C).
- Dual independent safety circuits: Two independent safety circuits continuously monitor system status; if sensor failure, over‑temperature (>420 °C), or short circuit is detected, heating stops automatically, an error message is displayed, and power is cut.
- 420 °C over‑temperature protection (hardware cutoff): A separate thermal cut‑off sensor shuts down heating if the work plate exceeds 420 °C, preventing runaway heating, fire hazards, and sample destruction even if the primary control system fails.
- Flask‑position detection safety: The heating controller will detect when a flask is not correctly seated and will stop heating, preventing unsafe “dry” heating of the mantle.
Spill protection: IP21‑rated metal housing offers protection against solid foreign objects >12.5 mm and vertically falling water drops. The fire‑resistant metal housing also provides protection against chemical spills and is easy to clean.
Portability: Compact benchtop design with a small footprint of 295 × 160 mm and weight 3.7 kg, easily moved between workstations.
Maintenance: The brushless DC motor is maintenance‑free, requiring no routine brush replacement or lubrication. The ceramic‑coated work plate and metal housing are easy to clean with a mild detergent and soft, damp cloth.
Included accessories: The package typically includes the PT1000 external temperature sensor, support rod, support clamp and magnetic stirring bar.

4. SAFETY & COMPLIANCE ATTRIBUTES

Regulatory Status: General laboratory equipment for in vitro diagnostic (IVD) use; manufactured under ISO 9001 and ISO 13485 quality management systems. TÜV‑certified safety: CE, cTUVus, FCC.
Dual Independent Safety Circuits: Two independent safety circuits continuously monitor the device. In case of overheating, sensor failure, or an electrical fault, the device stops heating, displays an error message, and cuts off power, protecting the operator and preventing equipment damage.
Residual Heat Warning: The “HOT” safety indicator activates when the work plate exceeds 50 °C and continues flashing on the display even after the unit is turned off (including unplugged). This critical safety feature alerts users to the dangerously hot surface until the plate/mantle is safe to touch (temperature drops below 50 °C).
Over‑temperature Protection (Hardware): 420 °C hardware cutoff prevents runaway heating and fire hazards, even if the primary control system fails.
Flask‑Position Detection Safety: The heating controller can detect when a flask is out of position and automatically stops heating, preventing unsafe “dry” heating of the mantle.
Chemical Safety: The ceramic‑coated aluminium work plate and the fire‑resistant metal outer housing are resistant to strong acids, strong alkalis and organic solvents. The alumina‑fibre inner sleeve of the heating mantle is chemically resistant and will absorb small chemical spills without short‑circuiting the heating element.
Fire Safety: Fire‑resistant metal housing, glass‑fibre insulation, and a non‑flammable ceramic‑coated work plate provide excellent fire protection.
Electrical Safety: Designed with a brushless, spark‑free DC motor (explosion‑proof), making it safe for use in environments where flammable solvents may be present. The IP21‑rated housing offers protection against solid foreign objects >12.5 mm and vertically falling water drops.
Quality Assurance: Each instrument is factory‑calibrated, and the built‑in temperature self‑calibration function may be used by the customer to adjust the internal offset for improved precision. The unit is supplied with a calibration certificate and is backed by a manufacturer’s warranty.

5. STORAGE & HANDLING ATTRIBUTES

Storage: Store the instrument in a clean, dry, dust‑free environment at room temperature (15–30 °C) when not in use. Allow the unit to cool completely (verify “HOT” indicator is off) before storage. The heating mantle should be stored in a dry, clean environment to prevent moisture ingress into the fibre insulation.
Installation: Place the instrument on a stable, level, non‑flammable, heat‑resistant laboratory benchtop away from flammable materials, volatile solvents, combustible gases, or paper products. Allow at least 10 cm clearance on all sides for heat dissipation. Do not use near water baths or sinks where splashing may occur.
Cleaning: Unplug the unit and allow it to cool completely before cleaning. Wipe the ceramic‑coated work plate, the fire‑resistant metal housing, and the outer surface of the heating mantle with a soft, damp cloth using a mild laboratory detergent or 70 % isopropyl alcohol. For stubborn residues inside the heating mantle, use a non‑abrasive cleaner suitable for glass‑fibre surfaces. Do not immerse the unit in liquid. Do not use abrasive cleaners or metal‑scouring pads. Do not saturate the fibre insulation inside the heating mantle with liquid.
Pre‑use inspection: Before each use, inspect the power cord and plug for any damage. Ensure the heating mantle is free of cracks and foreign objects. Verify that the correct heating mantle size (250 mL) is fitted for the round‑bottom flask being used. Check that the flask is dry, free of cracks, and properly seated in the mantle for maximum surface contact.
Round‑bottom flask selection for heating mantle: Use only standard 250 mL round‑bottom flasks made of borosilicate glass (e.g., Pyrex or Kimax) designed to withstand the operating temperature up to 280 °C. Do not use cracked, damaged, or non‑borosilicate glassware. The inner diameter of the 250 mL round‑bottom flask mantle (89.75 mm) is specifically designed for a snug, secure fit.
Operation with external sensor (PT1000): Insert the PT1000 temperature sensor probe into the sample vessel and secure it with the support clamp. Do not allow the sensor wire to contact the hot heating mantle, as this may melt the insulation and cause sensor failure or an electrical hazard.
Attaching and removing heating mantles: Ensure the driving unit is turned off and cool. The interchangeable mantle attaches via a dedicated connector. Fit the mantle firmly onto the work plate and lock it according to the manufacturer’s instructions. To remove after use, allow the mantle to cool completely (“HOT” indicator off) before disconnecting.
Independent dual‑purpose operation (“two‑in‑one mode”): To run the instrument as two separate devices (one heating on the mantle, one stirring on the base work plate), follow the manufacturer’s configuration instructions in the user manual. This dual‑mode functionality dramatically increases laboratory productivity.
Temperature self‑calibration: To perform a self‑calibration, follow the manufacturer’s procedure using a calibrated external thermometer. This adjusts the internal offset to correct for minor temperature deviations and maintain measurement accuracy over time.
Timer operation: Program the timer for the desired heating and stirring duration. When the timer reaches zero, the unit stops heating but continues stirring (if stirring was enabled), and the buzzer sounds. Press any button to silence the buzzer. The timer can also be deactivated if not needed.
Cooling down: After use, turn off the power and allow the heating mantle to cool completely until the “HOT” indicator stops flashing (typically 30–60 minutes, depending on operating temperature) before cleaning, moving, storing, or changing the mantle.
Periodic verification: Verify temperature accuracy periodically using a calibrated external thermometer. If deviation exceeds specifications (±1 °C <100 °C or ±1 % >100 °C), perform a temperature self‑calibration routine or consult the manufacturer’s service guidelines for recalibration.

6. LABORATORY & CLINICAL APPLICATIONS

Primary Application: General‑purpose, medium‑volume heating and stirring for clinical diagnostics (trace element digestion for heavy metal testing – blood lead, urine cadmium, heavy metals), pharmaceutical quality control, analytical chemistry (reflux, distillation, solvent evaporation), mining and geochemistry sample preparation, and academic research laboratories where the ability to heat both round‑bottom flasks and flat‑bottom beakers on a single versatile platform is required.

Clinical Role: A versatile and essential benchtop instrument for hospital and clinical chemistry laboratories, toxicology departments, pharmaceutical R&D and quality control, analytical chemistry departments, environmental testing stations, mining laboratories, and research institutions. Critical for medium‑batch sample digestion for trace element analysis, agarose gel preparation (40–50 gels per batch), bulk culture media preparation (100–150 plates per batch), and dissolution testing where precise, safe, and versatile heating with stirring is mandatory for diagnostic accuracy and patient safety.

SAFETY HANDLING PRECAUTIONS

1. SAFETY PRECAUTIONS

Burn Hazard — High Plate and Mantle Temperature: The work plate can reach 280 °C, and the heating mantle remains dangerously hot for an extended period after the power is turned off. Do not touch the work plate or heating mantle for at least 30‑60 minutes after use, or until the residual heat “HOT” indicator stops flashing. Use appropriate heat‑resistant gloves or tools when handling vessels on the hot plate. Severe burns can occur upon contact.
Residual Heat Warning — Continues Even When Off: The “HOT” safety indicator activates when the work plate exceeds 50 °C and continues flashing on the display even after the unit is turned off (if still connected to mains). This critical safety feature alerts users to the dangerously hot surface until the plate is safe to touch (temperature drops below 50 °C). Always verify that the “HOT” indicator has stopped flashing before touching the plate or mantle.
Fire Hazard — Avoid Flammable Materials: Do not operate the instrument near flammable materials, volatile solvents, combustible gases, or paper products. Keep the work area clear of flammable substances. The heating temperature must be set at least 50 °C lower than the ignition point of the chemicals being used. Do not leave the instrument unattended while operating at high temperatures without appropriate safety protocols. The independent safety circuit (420 °C cutoff) provides backup protection but should not replace operator vigilance.
Over‑Temperature Protection — Dual Independent Safety Circuits: The instrument has dual independent safety circuits that continuously monitor the device. If the work plate exceeds 420 °C or a built‑in sensor malfunctions, the machine stops heating, displays an error message and may sound an audible alarm. If the first safety circuit fails and a short‑circuit is detected, the second safety circuit cuts off the power supply to ensure operator safety.
Interchangeable Heating Mantle — Correct Attachment and Removal: Ensure the driving unit is turned off and cool before attaching or removing heating mantles. The interchangeable mantle attaches via a dedicated connector. Fit the mantle firmly onto the work plate and lock it according to the manufacturer’s instructions. To remove after use, allow the mantle to cool completely (verify “HOT” indicator is off) before disconnecting. Only use mantles specifically designed for this model.
Vessel Selection — Proper Flask Fit: Use only standard 250 mL round‑bottom flasks made of borosilicate glass (e.g., Pyrex or Kimax) designed to withstand the operating temperature up to 280 °C. Do not use cracked, damaged, or non‑borosilicate glassware. The inner diameter of the 250 mL round‑bottom flask mantle (89.75 mm) is specifically designed for a snug, secure fit. A loose‑fitting flask can cause uneven heating and create a fire hazard.
Thermal Shock — Gradual Heating Only: Do not place a cold flask directly into a pre‑heated heating mantle, as thermal shock may cause the glass to crack or shatter. Allow the flask and heating mantle to heat up together gradually. The high‑temperature glass‑fibre liner reaches temperature quickly; allow the flask to warm slowly. Sudden temperature changes can cause dangerous glass fragmentation.
Magnetic Field Interference — Medical Devices: The stirrer contains strong permanent magnets. People with implanted medical devices (e.g., pacemakers, implantable cardioverter‑defibrillators, neurostimulators) should keep a safe distance of at least 30 cm from the operating stirrer. Do not place the instrument near credit cards, hard drives, computer monitors, or other magnetic‑sensitive equipment.
Electrical Safety — Proper Grounding: Do not operate the instrument with wet hands. Ensure the mains power cable does not come into contact with liquids or sharp edges that could damage the insulation. Use only the supplied grounded power cord and ensure the outlet provides proper grounding. Disconnect the power cord before cleaning, servicing, or moving the unit. Do not operate if the power cord is damaged. The IP21 rating offers protection against vertically falling water drops, but does not protect against immersion or significant liquid spills.
Starting Stirring — Smooth Acceleration: Always start stirring at a low speed (200‑300 rpm) and gradually increase to the desired level. A sudden high‑speed start may cause the stir bar to decouple, spin erratically, or strike the vessel wall, leading to splashing, spillage or vessel breakage. The brushless DC motor provides smooth acceleration, but operator caution is still required.
Chemical Compatibility — Ceramic Coating Limits: The ceramic‑coated aluminium work plate is resistant to strong acids, strong alkalis and organic solvents. However, prolonged exposure to some concentrated mineral acids (e.g., hydrofluoric acid, concentrated sulphuric acid) or aggressive organic solvents may degrade the coating. Clean spills promptly. Refer to the Safety Data Sheet (SDS) for specific chemicals. Never heat sealed vessels or containers that cannot vent pressure, as explosion may result.
Heating Mantle Contamination: If the inner glass‑fibre chamber of the heating mantle becomes contaminated with chemical spills, do not attempt to clean it. Once the insulation is saturated, the contamination cannot be removed, and the whole mantle may need replacement. Avoid heating substances that may produce corrosive vapours that can attack the fibre insulation.
Spill Management — Prevent Liquids Entering Housing: If a liquid spill occurs on the work plate or heating mantle during operation, turn off the heating and stirring functions immediately. Unplug the unit, allow the plate to cool (if heated) and wipe the spill clean with a soft, damp cloth. Do not let liquids seep under the work plate or into the housing. The IP21 rating does not protect against pooling liquids or immersion.
Operating Environment — Clean, Stable Benchtop: Use the instrument indoors only, on a stable, level, non‑flammable laboratory benchtop. Do not use in explosive atmospheres or in the presence of flammable gases or vapours. The permissible ambient temperature range is 5‑40 °C with relative humidity not exceeding 80 %. Allow at least 10 cm clearance on all sides for proper heat dissipation and ventilation. Do not cover the instrument during operation.
External PT1000 Sensor Safety — Secure Placement: When using the PT1000 external temperature sensor (included), insert the sensor probe into the sample vessel and secure it with a suitable stand and clamp (included). Do not allow the sensor cable to contact the hot work plate, as this may melt the wire insulation and cause sensor failure, electrical hazard or burns. If any abnormal situation is detected (e.g., sensor failure or disconnection, indicated by an error code on the display), the heating mode will automatically shut down as a safety precaution. Always inspect the sensor cable for damage before use.
Cleaning and Maintenance — Safe Cleaning Protocols: Unplug the unit and allow the work plate and heating mantle to cool completely before cleaning. Wipe the ceramic‑coated work plate and the metal housing with a soft, damp cloth using a mild laboratory detergent or 70 % isopropyl alcohol. Do not immerse the unit in liquid. Do not use abrasive cleaners or metal‑scouring pads that could scratch the ceramic coating. Do not saturate the fibre insulation inside the heating mantle with liquid; if contaminated, replace the mantle. The brushless DC motor requires no routine maintenance, but periodically inspect the power cord for signs of wear or damage.
Training Requirement — Qualified Users Only: Only trained laboratory personnel with appropriate technical background in hotplate stirrer and heating mantle operation should operate this instrument for clinical diagnostic or research applications. Users must read and understand the operator’s manual before first use. Laboratory managers should ensure all operators are aware of the proper procedure for starting and stopping stir bars, changing heating mantles, and the specific safety considerations for heating and stirring hazardous materials.

2. FIRST AID MEASURES

Burn from Hot Surface: If skin contacts the hot work plate, heating mantle, or a hot vessel, immediately cool the burn area with cool (not cold) running water for at least 15 minutes. Do not apply ice directly. Remove any jewellery or constrictive items from the affected area. Cover the burn with a sterile, non‑adhesive dressing. Seek medical attention for large‑area burns (larger than the palm of the hand), deep burns (white or charred appearance), or burns causing blistering. For burns on the face, hands, feet, or genitals, seek immediate medical attention.
Fire: If a fire occurs on or near the instrument, immediately turn off the power if safe to do so. Use a class ABC dry chemical fire extinguisher or carbon dioxide (CO₂) extinguisher. Do not use water on electrical fires. Evacuate the immediate area if the fire cannot be immediately controlled. Call emergency services.
Chemical Splash to Eyes: If a heated chemical sample or reagent splashes into the eyes, immediately flush the eyes with copious amounts of cool water or sterile saline for at least 15 minutes. Hold the eyelids open to ensure thorough rinsing. Remove contact lenses if present and easily removable. Seek immediate medical attention. Do not attempt to neutralise the chemical in the eye.
Chemical Splash to Skin: Remove contaminated clothing immediately. Flush the affected skin area with cool running water for at least 15 minutes. Do not rub or scrub. Seek medical evaluation for chemical burns or if irritation persists. Refer to the Safety Data Sheet (SDS) for the specific chemical involved.
Inhalation of Fumes: If fumes from heated chemicals are inhaled, move the affected person to fresh air immediately. Keep the person warm and at rest. If breathing is difficult, administer oxygen if trained. If breathing stops, perform CPR. Seek immediate medical attention.
Electrical Shock: If an electrical shock incident occurs, disconnect power at the circuit breaker before attempting to assist the victim. Do not touch the victim until the power is disconnected. Once safe, assess the victim for responsiveness and breathing. Call emergency medical services immediately. Perform CPR if trained and necessary. Seek medical evaluation for all electrical shock victims, even if symptoms appear mild.

3. FIRE FIGHTING MEASURES

Flammability — Primary Fire Hazard is Heated Chemicals: The instrument’s metal housing is non‑flammable, but the power cord, internal wiring, electronic components, and plastic control elements are combustible. The glass‑fibre inner sleeve and ceramic‑coated work plate are non‑flammable. The primary fire hazard is the flammable chemicals, solvents, or materials being heated in the flask or stirred on the work plate.
Extinguishing Media — Electrical Fires Require CO₂ or Dry Chemical: Use carbon dioxide (CO₂), dry chemical (ABC class), or alcohol‑resistant foam extinguishers for fires involving the electrical components or nearby flammable materials. Do not use water on electrical fires, as water conducts electricity and can cause electrical shock or damage the instrument.
Fire Response — Isolate Power and Evacuate: Immediately disconnect power to the instrument at the circuit breaker if safe to do so. Evacuate the immediate area. Use an appropriate fire extinguisher for small, contained fires. For larger fires, evacuate the laboratory and call emergency services. Do not attempt to extinguish a fire if not trained or if the fire is spreading rapidly.
Special Protective Equipment for Firefighters: Firefighters should wear self‑contained breathing apparatus (SCBA) and full structural firefighting gear (including gloves, boots, helmet, and turnout coat) when fighting fires in laboratory settings, as combustion products may include toxic fumes from burning plastics, chemicals, and electrical components.

LCD Digital Heating Magnetic Stirrer (MS‑H280‑F250)

LCD Digital Heating Magnetic Stirrer (MS-H280-F250)

PRIMARY CLINICAL & DIAGNOSTIC USES

SECONDARY & SUPPORTIVE USES

1. BASIC IDENTIFICATION ATTRIBUTES

Device Type: A modular, programmable LCD digital heating magnetic stirrer with an interchangeable 250 mL round‑bottom flask heating mantle.

Designation: MS‑H280‑F250 LCD Digital Heating Magnetic Stirrer; LCD Digital Magnetic Stirrer with Electric Heating Mantle; DLAB MS‑H280‑F250.

Catalogue Number: 8017383100.

Key Components:

Interchangeable 250 mL round‑bottom flask heating mantle with inner diameter 89.75 mm

Glass‑fibre and high‑quality aluminium‑silicate (ceramic) wool inner liner for uniform thermal distribution

Aluminium‑structure heating mantle outer shell with powder‑coated, corrosion‑resistant finish

Fire‑resistant (metal) outer housing

Ø135 mm ceramic‑coated aluminium work plate (when mantle is detached)

Maintenance‑free, spark‑free brushless DC motor (explosion‑proof)

High‑resolution LCD display showing set and actual values for speed, temperature and timer

PT1000 external temperature sensor port with sensor, support rod and clamp included with the package

Built‑in temperature self‑calibration function (customer‑accessible)

Programmable timer (1 minute to 99 hours 59 minutes)

Safety lock to prevent accidental changes to operating status

Independent “HOT” residual heat indicator (flashes when work plate temperature >50 °C, even after power off)

Dual independent safety circuits with over‑temperature protection (420 °C hardware cutoff)

IP21‑rated housing (protection against solids >12.5 mm and vertically falling water drops)

2. TECHNICAL & PERFORMANCE PROPERTIES

Heating mantle capacity (F250 variant): 250 mL round‑bottom flasks.

Heating mantle inner diameter (F250): 89.75 mm, precision‑contoured for optimal thermal contact with standard 250 mL round‑bottom flasks.

Mantle insulation material: High‑quality aluminium‑silicate (ceramic) wool / alumina fiber sleeve, providing uniform heating, durability and corrosion resistance.

Work plate material (when mantle detached): Ceramic‑coated aluminium (strong acid‑resistant, strong alkali‑resistant, durable, easy to clean).

Work plate dimensions (when mantle detached): Ø135 mm (5 inches).

Maximum stirring capacity (H₂O) on work plate: 20 L.

Speed range: 200–1500 rpm, adjustable.

Speed setting resolution: 1 rpm.

Speed accuracy: ±10 rpm.

Heating temperature range: Room temperature to 280 °C, adjustable in 1 °C increments.

Temperature control accuracy (plate surface): ±1 °C (<100 °C), ±1 % (>100 °C).

External temperature sensor (PT1000) accuracy: ±0.2 °C.

Temperature display accuracy: ±0.1 °C.

Timer range: 1 minute to 99 hours 59 minutes.

Number of stirring positions: 1.

Maximum stir bar length: 80 mm.

Motor type: Maintenance‑free, spark‑free brushless DC motor.

Motor input power: 1.8 W.

Heating output (mantle power): 240 W.

Total power consumption: 650 W (heating + stirring).

Over‑temperature protection: 420 °C hardware cutoff (dual independent safety circuits).

Residual heat warning: Activates above 50 °C; “HOT” flashes on screen and continues even after unit is powered off (including unplugged) until the plate cools below 50 °C.

Protection class: IP21.

Power requirements: 100–120 V / 200‑240 V, 50/60 Hz (universal input, user‑selectable by region).

Dimensions (L × W × H): 295 × 160 × 160 mm.

Weight: 3.7 kg.

Operating conditions: Ambient temperature 5–40 °C, ≤80 % relative humidity.

Certifications: TÜV‑certified (CE, cTUVus, FCC), meeting international product safety standards.

3. PHYSICAL & OPERATIONAL PROPERTIES

Dual‑mode operation (“Two‑in‑One Mode”): The instrument can be used in three independent configurations:

Mode 1 (Heating + Stirring on Mantle): The mantle provides simultaneous heating and stirring of the contents of the 250 mL round‑bottom flask.

Mode 2 (Stirring‑Only): The mantle can be detached, and the instrument functions as a standard 20‑litre magnetic stirrer on its Ø135 mm ceramic‑coated work plate.

Display: High‑contrast LCD digital display simultaneously shows set and actual values for temperature and speed, as well as timer status, providing complete operational visibility at a glance without toggling options.

Operation: Simple, intuitive digital controls with tactile buttons for temperature, speed and timer programming. Incremental 1 °C temperature adjustment and 1 rpm speed resolution allow precise setting of experimental parameters.

Stirring system: Powerful rare‑earth magnets provide strong magnetic coupling, preventing stir bar decoupling even with viscous liquids or at high speeds. The brushless DC motor provides stable torque and ultra‑quiet, vibration‑free operation.

Safety functions:

Safety lock: Prevents accidental changes to operating status once parameters are set.

Dual independent safety circuits: Two independent safety circuits continuously monitor system status; if sensor failure, over‑temperature (>420 °C), or short circuit is detected, heating stops automatically, an error message is displayed, and power is cut.

420 °C over‑temperature protection (hardware cutoff): A separate thermal cut‑off sensor shuts down heating if the work plate exceeds 420 °C, preventing runaway heating, fire hazards, and sample destruction even if the primary control system fails.

Flask‑position detection safety: The heating controller will detect when a flask is not correctly seated and will stop heating, preventing unsafe “dry” heating of the mantle.

Spill protection: IP21‑rated metal housing offers protection against solid foreign objects >12.5 mm and vertically falling water drops. The fire‑resistant metal housing also provides protection against chemical spills and is easy to clean.

Portability: Compact benchtop design with a small footprint of 295 × 160 mm and weight 3.7 kg, easily moved between workstations.

Maintenance: The brushless DC motor is maintenance‑free, requiring no routine brush replacement or lubrication. The ceramic‑coated work plate and metal housing are easy to clean with a mild detergent and soft, damp cloth.

Included accessories: The package typically includes the PT1000 external temperature sensor, support rod, support clamp and magnetic stirring bar.

4. SAFETY & COMPLIANCE ATTRIBUTES

Regulatory Status: General laboratory equipment for in vitro diagnostic (IVD) use; manufactured under ISO 9001 and ISO 13485 quality management systems. TÜV‑certified safety: CE, cTUVus, FCC.

Dual Independent Safety Circuits: Two independent safety circuits continuously monitor the device. In case of overheating, sensor failure, or an electrical fault, the device stops heating, displays an error message, and cuts off power, protecting the operator and preventing equipment damage.

Over‑temperature Protection (Hardware): 420 °C hardware cutoff prevents runaway heating and fire hazards, even if the primary control system fails.

Flask‑Position Detection Safety: The heating controller can detect when a flask is out of position and automatically stops heating, preventing unsafe “dry” heating of the mantle.

Fire Safety: Fire‑resistant metal housing, glass‑fibre insulation, and a non‑flammable ceramic‑coated work plate provide excellent fire protection.

Electrical Safety: Designed with a brushless, spark‑free DC motor (explosion‑proof), making it safe for use in environments where flammable solvents may be present. The IP21‑rated housing offers protection against solid foreign objects >12.5 mm and vertically falling water drops.

Quality Assurance: Each instrument is factory‑calibrated, and the built‑in temperature self‑calibration function may be used by the customer to adjust the internal offset for improved precision. The unit is supplied with a calibration certificate and is backed by a manufacturer’s warranty.

5. STORAGE & HANDLING ATTRIBUTES

Operation with external sensor (PT1000): Insert the PT1000 temperature sensor probe into the sample vessel and secure it with the support clamp. Do not allow the sensor wire to contact the hot heating mantle, as this may melt the insulation and cause sensor failure or an electrical hazard.

Temperature self‑calibration: To perform a self‑calibration, follow the manufacturer’s procedure using a calibrated external thermometer. This adjusts the internal offset to correct for minor temperature deviations and maintain measurement accuracy over time.

Timer operation: Program the timer for the desired heating and stirring duration. When the timer reaches zero, the unit stops heating but continues stirring (if stirring was enabled), and the buzzer sounds. Press any button to silence the buzzer. The timer can also be deactivated if not needed.

Device Type: A modular, programmable LCD digital heating magnetic stirrer with an interchangeable 250 mL round‑bottom flask heating mantle.

Interchangeable 250 mL round‑bottom flask heating mantle with inner diameter 89.75 mm

Ø135 mm ceramic‑coated aluminium work plate (when mantle is detached)

Programmable timer (1 minute to 99 hours 59 minutes)

Independent “HOT” residual heat indicator (flashes when work plate temperature >50 °C, even after power off)

Dual independent safety circuits with over‑temperature protection (420 °C hardware cutoff)

IP21‑rated housing (protection against solids >12.5 mm and vertically falling water drops)

Heating mantle capacity (F250 variant): 250 mL round‑bottom flasks.

Heating mantle inner diameter (F250): 89.75 mm, precision‑contoured for optimal thermal contact with standard 250 mL round‑bottom flasks.

Work plate dimensions (when mantle detached): Ø135 mm (5 inches).

Maximum stirring capacity (H₂O) on work plate: 20 L.

Speed range: 200–1500 rpm, adjustable.

Speed setting resolution: 1 rpm.

Speed accuracy: ±10 rpm.

Heating temperature range: Room temperature to 280 °C, adjustable in 1 °C increments.

Temperature control accuracy (plate surface): ±1 °C (<100 °C), ±1 % (>100 °C).

External temperature sensor (PT1000) accuracy: ±0.2 °C.

Temperature display accuracy: ±0.1 °C.

Timer range: 1 minute to 99 hours 59 minutes.

Maximum stir bar length: 80 mm.

Motor input power: 1.8 W.

Heating output (mantle power): 240 W.

Total power consumption: 650 W (heating + stirring).

Over‑temperature protection: 420 °C hardware cutoff (dual independent safety circuits).

Residual heat warning: Activates above 50 °C; “HOT” flashes on screen and continues even after unit is powered off (including unplugged) until the plate cools below 50 °C.

Power requirements: 100–120 V / 200‑240 V, 50/60 Hz (universal input, user‑selectable by region).

Dimensions (L × W × H): 295 × 160 × 160 mm.

Weight: 3.7 kg.

Operating conditions: Ambient temperature 5–40 °C, ≤80 % relative humidity.

Mode 1 (Heating + Stirring on Mantle): The mantle provides simultaneous heating and stirring of the contents of the 250 mL round‑bottom flask.

Mode 2 (Stirring‑Only): The mantle can be detached, and the instrument functions as a standard 20‑litre magnetic stirrer on its Ø135 mm ceramic‑coated work plate.

Operation: Simple, intuitive digital controls with tactile buttons for temperature, speed and timer programming. Incremental 1 °C temperature adjustment and 1 rpm speed resolution allow precise setting of experimental parameters.

Dual independent safety circuits: Two independent safety circuits continuously monitor system status; if sensor failure, over‑temperature (>420 °C), or short circuit is detected, heating stops automatically, an error message is displayed, and power is cut.

420 °C over‑temperature protection (hardware cutoff): A separate thermal cut‑off sensor shuts down heating if the work plate exceeds 420 °C, preventing runaway heating, fire hazards, and sample destruction even if the primary control system fails.

Spill protection: IP21‑rated metal housing offers protection against solid foreign objects >12.5 mm and vertically falling water drops. The fire‑resistant metal housing also provides protection against chemical spills and is easy to clean.

Portability: Compact benchtop design with a small footprint of 295 × 160 mm and weight 3.7 kg, easily moved between workstations.

Regulatory Status: General laboratory equipment for in vitro diagnostic (IVD) use; manufactured under ISO 9001 and ISO 13485 quality management systems. TÜV‑certified safety: CE, cTUVus, FCC.

Over‑temperature Protection (Hardware): 420 °C hardware cutoff prevents runaway heating and fire hazards, even if the primary control system fails.

Electrical Safety: Designed with a brushless, spark‑free DC motor (explosion‑proof), making it safe for use in environments where flammable solvents may be present. The IP21‑rated housing offers protection against solid foreign objects >12.5 mm and vertically falling water drops.

Cooling down: After use, turn off the power and allow the heating mantle to cool completely until the “HOT” indicator stops flashing (typically 30–60 minutes, depending on operating temperature) before cleaning, moving, storing, or changing the mantle.