LCD Digital Heating Magnetic Stirrer with Timer (MS‑H‑ProT)

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The LCD Digital Heating Magnetic Stirrer with Timer (MS‑H‑ProT) is a high‑performance, programmable benchtop instrument engineered for accurate, safe, and efficient simultaneous heating and stirring in clinical diagnostics, pharmaceutical quality control, analytical chemistry, and industrial research laboratories. Featuring a 5‑inch (φ135 mm) ceramic‑coated stainless steel work plate, this PID‑controlled hotplate stirrer delivers a heating range from room temperature to 340 °C (±1 °C accuracy in 1 °C increments) and a digital stirring range of 100 to 1500 rpm (±1 rpm resolution), with a maximum stirring capacity of 20 litres of water.

Every LCD Digital Heating Magnetic Stirrer with Timer (MS‑H‑ProT) is individually factory‑calibrated and supplied with a calibration certificate traceable to international standards. The high‑resolution backlit LCD display simultaneously shows set and actual values for temperature, speed, and timer, providing complete operational visibility at a glance. The ceramic‑coated stainless steel work plate resists strong acids, strong alkalis, and organic solvents, providing rapid, uniform heat distribution without localised hot spots, while the maintenance‑free DC brushless motor (spark‑free) ensures ultra‑quiet, vibration‑free, long‑term reliability across the full 20‑litre capacity.

Key user‑focused safety features include dual independent safety circuits (redundant safety) for over‑temperature protection (user‑settable safety temperature cut‑out, 360 °C hardware cut‑off recommended), an independent residual heat warning indicator (“HOT” flashes on the display at >50 °C and continues even after the unit is turned off, if still connected to mains, until the plate is safe to touch), and IP21/IP42‑rated housing (check specification) offering basic to advanced splash and dust protection. An optional PT1000 external temperature sensor (±0.2 °C accuracy) provides precise closed‑loop control of the actual sample liquid temperature. An RS232 data interface enables remote PC control and full GLP‑compliant experiment documentation. A programmable timer (1 min‑99 h 59 min) enables fully unattended operation for extended‑duration stability studies and QC protocols, with the ability to stop heating at the end of a timed run while continuing stirring to protect heat‑sensitive samples.

With a compact footprint (160 × 280 mm), moderate weight (2.8 kg), and a universal power supply (100‑240 V, 50/60 Hz), the MS‑H‑ProT occupies minimal bench space while delivering exceptional performance suitable for demanding clinical and research workflows. The instrument is manufactured under ISO 13485 and ISO 9001 quality management systems, meets international safety standards (TÜV‑certified), and is backed by a 2‑year manufacturer’s warranty.

For the clinical laboratory scientist, pharmaceutical QC chemist, and research scientist, the MS‑H‑ProT delivers the modular versatility, large‑batch processing capacity, and true regulatory‑grade safety required for sample digestion for trace element analysis (blood lead, urine cadmium), bulk gel melting, and large‑scale dissolution testing. For the patient, the reliable, accurate, and safe thermal processing of this TÜV‑certified instrument ensures that life‑saving diagnostic tests and pharmaceutical therapies remain consistently reliable and reproducible, directly supporting effective clinical decision‑making, appropriate treatment selection, and patient safety.

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Description

LCD Digital Heating Magnetic Stirrer with Timer (MS-H-ProT)

PRIMARY CLINICAL & DIAGNOSTIC USES

1. High-Precision Heating and Stirring for Molecular Diagnostics and Clinical Research
Primary Use: Provides a programmable, high‑performance LCD digital heating magnetic stirrer with a 5‑inch (φ135 mm) ceramic‑coated stainless steel work plate, a maintenance‑free DC brushless motor, and a full PID temperature control system. It is designed for the precise, uniform heating and simultaneous mixing of clinical samples, reagents, buffers, nucleic acid extracts, and biological specimens in clinical chemistry, molecular diagnostics, biopharmaceutical development, and quality‑control laboratories. The system features a maximum stirring capacity of 20 litres (water), a digital stepless speed range of 100 to 1500 rpm (±1 rpm resolution), and a heating temperature range from room temperature up to 340 °C in 1 °C increments. A high‑resolution backlit LCD display simultaneously shows set and actual values for temperature, speed, and time (timer) in one screen, while an RS232 data interface enables remote PC control and full GLP‑compliant data logging.

How it helps: For the clinical laboratory scientist and molecular biologist, the MS‑H‑ProT’s PID temperature control technology and durable ceramic‑coated stainless steel work plate (strong acid‑resistant, strong alkali‑resistant) ensure consistent thermal conditions, prevent reagent contamination from surface corrosion and keep the work plate easy to clean. The large 20‑litre stirring capacity supports bulk buffer and QC preparation, and the high‑resolution backlit LCD display simultaneously shows set and actual values for temperature, speed, and time (timer), providing complete operational visibility at a glance. An optional external PT1000 temperature sensor (sold separately) can be connected through the dedicated port for closed‑loop control of the actual sample liquid temperature with ±0.2 °C accuracy, supporting the most sensitive diagnostic and research applications. For the patient, this precise and reproducible heating and mixing directly supports accurate diagnostic test results in areas such as infectious disease testing, genetic screening, oncology biomarker detection, and effective pharmaceutical research. The DC brushless motor is maintenance‑free, spark‑free and explosion‑proof, making the instrument exceptionally safe for use in environments where flammable solvents may be present.

2. Programmable Timer for Unattended, Extended‑Duration QC and Stability Protocols
Primary Use: The MS‑H‑ProT features a fully integrated programmable electronic timer (1 minute to 99 hours 59 minutes) that can be set to automatically stop heating (configured via the control panel) at the end of a timed run while optionally continuing to stir. This independent timer function, combined with the instrument’s dual independent safety circuits, user‑settable safety temperature limit (360 °C hardware cutoff), and RS232 data‑logging interface, enables safe, unattended operation for extended‑duration stability studies, overnight digestions, large‑scale dissolution testing, and other time‑critical QC protocols.

How it helps: For the pharmaceutical QC supervisor and laboratory manager, the programmable timer can be set to automatically stop heating at the end of a timed run while continuing stirring, allowing the sample to cool safely under agitation and preventing thermal degradation of heat‑sensitive materials. The integrated user‑settable safety temperature cut‑out (hardware cut‑off at 360 °C) provides an extra layer of protection for expensive or hazardous samples during unattended operation. The RS232 interface supports remote PC control and logging of temperature and speed data via computer software (e.g., StirPC), enabling full experiment documentation and integration into automated laboratory workflows. Data logs can be exported for permanent storage, process validation, and failure analysis, meeting the documentation requirements of ISO 9001 and ISO 13485 quality management systems. This automated, fully documented workflow dramatically improves laboratory productivity while maintaining stringent quality control standards, ensuring safer pharmaceutical products and reliable diagnostic test results.

3. Controlled Sample Digestion and Trace‑Element Analysis for Clinical Toxicology
Primary Use: Enables the controlled heating, digestion and ashing of patient serum, whole blood, urine, and tissue homogenates in strong acids at temperatures up to 340 °C, prior to trace‑element analysis by atomic absorption spectroscopy (AAS) or inductively coupled plasma mass spectrometry (ICP‑MS). The built‑in PT1000 external temperature sensor port (PT1000 accuracy ±0.2 °C) enables closed‑loop control of the actual sample temperature, and the programmable timer can be set to automatically stop heating when the digestion finishes (while continuing to stir), allowing samples to cool safely without operator supervision.

How it helps: For the trace element analyst processing multiple patient samples in toxicology and occupational health screening, the 340 °C maximum temperature capability and external PT1000 sensor (accuracy ±0.2 °C) ensure complete, uniform oxidation of organic matrices, eliminating matrix interference that could compromise heavy metal detection (e.g., lead, mercury, cadmium). The user‑settable safety temperature cut‑out (360 °C hardware cutoff) provides essential protection during high‑temperature acid digestions, and the programmable timer can be used for fully unattended, overnight digestion protocols, dramatically improving laboratory productivity. For the patient undergoing heavy metal screening or nutritional deficiency monitoring as part of occupational health or environmental exposure assessment, the accurate, controlled ashing and digestion ensures precise and reliable clinical measurements, free from matrix interference, directly supporting correct diagnosis and appropriate treatment.

4. Benchtop Gel Melting, Culture Media Preparation and Clinical Microbiology QC
Primary Use: Used for the safe, uniform heating, melting and homogenisation of large volumes of solid or semi‑solid culture media, nutrient agars, and agarose gels, as well as the preparation of temperature‑sensitive standard solutions, buffers and quality control reagents for high‑throughput molecular diagnostics and clinical microbiology workflows. The 5‑inch oversize ceramic‑coated plate (φ135mm) can accommodate multiple vessels (beakers, flasks, test‑tube racks) or a single large container up to 5‑20 L.

How it helps: For the clinical molecular biologist and microbiology technologist, the 20‑litre capacity supports the preparation of up to 200‑250 culture plates or 100‑150 standard electrophoresis gels in a single batch, dramatically improving laboratory efficiency for high‑volume testing facilities. The ceramic‑coated stainless steel work plate provides uniform heat distribution and is extremely resistant to corrosion and chemical attack, allowing solid media to melt evenly without localised scorching that could degrade nutrients. The independent timer function can be programmed to stop heating exactly at the endpoint of a melting protocol while continuing to stir, allowing the media to cool gently under agitation and preventing thermal degradation of heat‑sensitive components. The “HOT” indicator warning remains active even after the unit has been switched off (if still connected to mains), protecting laboratory personnel from delayed‑onset burns. For the patient, correctly prepared, homogeneous media in sufficient batch volume ensures that bacterial identification and molecular diagnostic testing are accurate, timely, and reproducible across large numbers of patient specimens.

SECONDARY & SUPPORTIVE USES

1. Chemical synthesis and reflux for pharmaceutical process development: Provides stable, uniform heating for distillation, reflux, and digestion of organic compounds, supporting fine chemical, pharmaceutical, and industrial research – with the ability to reach 340 °C for high‑boiling‑point solvents and numerous synthetic routes. The instrument is suitable for scientific research, industrial and mining applications, food processing, biochemistry, agriculture, petrochemistry, and pharmaceutical industries. Three selectable heating modes (A, B, C) give the user flexibility to choose the optimal thermal profile for their specific synthesis protocol.

2. Bulk solvent evaporation and concentration for analytical chemistry: Gently heats large‑volume organic solvents 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 monitoring, food safety testing (e.g., pesticide residue analysis), and pharmaceutical formulation development – ideal for processing multi‑litre extracts where smaller evaporators would be inefficient.

3. Dissolution testing for large‑scale drug development and QC: Provides precise heating to simulate dissolution and stability test conditions for solid oral dosage forms (tablets, capsules) using beakers or vessels containing heated buffer solutions; the large 20‑litre capacity can accommodate full‑size dissolution apparatus setups and the programmable timer supports automated, extended‑duration dissolution studies.

4. Heating metal blocks for high‑throughput nucleic acid and immunoassay workflows: The 5‑inch work plate can accommodate a variety of metal heating blocks for 0.2 mL PCR tubes, 1.5 mL microcentrifuge tubes, 96‑well plates, and other common vessels, supporting bead‑based DNA extraction, DNA denaturation (95‑100 °C), ELISA plate incubation, and metal‑bead incubations across 96‑384 samples simultaneously. Three‑mode heating (fast, standard, steady) can be used to optimise the thermal profile for different molecular biology applications.

5. Geochemical, mining and environmental large‑batch sample preparation: Prepares solid environmental and mining samples – such as soils, sediments, rocks, and ores – by acid‑digesting or ashing them in batches of up to 20 L in preparation for analysis of mineral content and elemental pollutants, with the high‑temperature‑capable plate (340 °C) handling heavy crucibles and aggressive acids while enabling processing of representative bulk samples with high throughput. The dual‑circuit safety system and user‑settable safety temperature provide essential protection during extended‑duration hot acid digestions.

6. Protein denaturation and enzyme inactivation for industrial biochemistry: Heats protein solutions in beakers or flasks 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, with the programmable timer allowing automated, reproducible denaturation protocols.

7. General‑purpose teaching and advanced research laboratory heating: Serves as a versatile, user‑friendly teaching tool for demonstrating the principles of high‑temperature chemistry, distillation, reflux, and solution preparation in university chemistry, clinical laboratory science, and pharmaceutical laboratory courses, with a large, clear 5‑inch plate suitable for student‑accessible workstations and group demonstrations.

KEY PRODUCT FEATURES

1. BASIC IDENTIFICATION ATTRIBUTES

Device Type: A programmable, high‑precision LCD digital heating magnetic stirrer (hotplate stirrer) with a 5‑inch round ceramic‑coated work plate and full PID temperature control.
Designation: LCD Digital Heating Magnetic Stirrer with Timer (MS‑H‑ProT); DLAB MS‑H‑ProT; Scilogex MS‑H‑ProT.
Catalogue Numbers: 8030201110 (standard instrument); 8130231110 (Package 1, includes PT1000‑A and stand); 8130231110+18902044 (Package 2, includes PT1000‑A sensor and support clamp).
Key Components:
- 5‑inch (φ135 mm) stainless steel work plate with durable ceramic coating – strong acid‑resistant, strong alkali‑resistant, easy to clean, uniform heat distribution.
- Maintenance‑free, spark‑free, explosion‑proof DC brushless motor (18 W input, 10 W output).
- High‑resolution backlit LCD display – simultaneously shows set and actual values for temperature, speed, and timer status.
- PID temperature controller (microprocessor‑controlled) with 340 °C maximum heating limit and 1 °C setpoint increments.
- External PT1000 temperature sensor port (PT1000 accuracy ±0.2 °C) for closed‑loop sample temperature control.
- Programmable electronic timer (1 min to 99 h 59 min) – stops heating at the end of a timed run (can be set to continue stirring).
- RS232 data interface – remote PC control, real‑time monitoring, and data logging for GLP compliance.
- Three selectable heating modes (A: fast heating, B: standard heating, C: steady heating, depending on model/firmware).
- Independent residual heat warning (“HOT” flashes on display when plate >50 °C, continues even after unit is turned off if still connected to mains).
- Dual independent safety circuits – over‑temperature protection (360 °C / 420 °C hardware cut‑off depending on model/source).
- Safety lock – prevents accidental changes to operating status once parameters are set.
- IP21 or IP42‑rated die‑cast aluminium or metal housing (depending on specification) – protection against solid foreign objects >12.5 mm and vertically falling water drops or splashing water.
- Universal power supply (100‑120 V, 60 Hz / 200‑240 V, 50 Hz).

2. TECHNICAL & PERFORMANCE PROPERTIES

Work plate dimensions: φ135 mm (5 inches).
Work plate material: Stainless steel with ceramic coating – strong acid‑resistant, strong alkali‑resistant, durable, easy to clean, uniform heat distribution.
Motor type: Maintenance‑free, spark‑free, explosion‑proof DC brushless motor.
Motor rating input: 18 W.
Motor rating output: 10 W.
Maximum stirring capacity (H₂O): 20 litres.
Speed range: 100 to 1500 rpm (adjustable in 1 rpm increments).
Speed display: LCD digital display (actual speed).
Heating temperature range: Room temperature to 340 °C (adjustable in 1 °C increments).
Temperature control accuracy (plate surface): ±1 °C (<100 °C) / ±1 % (>100 °C).
Temperature display accuracy: ±0.1 °C.
External temperature sensor (PT1000) accuracy: ±0.2 °C.
Timer range: 1 minute to 99 hours 59 minutes (programmable via digital control panel).
Timer behaviour: When countdown finishes, unit stops heating (if heating was configured) but can be set to continue stirring to prevent thermal degradation of heat‑sensitive samples.
Heating output (resistance element): 500 W.
Total power consumption (heating + motor + electronics): 550 W (sources give 550 W to 720 W depending on model/spec – 550 W appears more common).
Hardware safety cut‑off temperature: 360 °C (or 420 °C depending on model/source) – two independent safety circuits; if this temperature is exceeded, the instrument automatically stops heating.
Residual heat warning: Activates above 50 °C; “HOT” flashes on display and continues even after unit is powered off (if still connected to mains) until plate cools below 50 °C.
Number of stirring positions: 1.
Maximum stir bar length: 80 mm.
Data interface: RS232 (remote PC control and data logging).
Protection class (IP rating): IP21 or IP42 (depending on specification – IP42 appears common in newer documentation) – protection against solid objects >12.5 mm and (for IP42) splashing water from any direction.
Power requirements: Universal input – 100‑120 V, 60 Hz / 200‑240 V, 50 Hz.
Dimensions (W × D × H): 160 × 280 × 100 mm (some sources give 280 × 160 × 85 mm) – the 160 × 280 × 100 mm dimension appears most consistent on DLAB‑branded materials.
Weight: 2.8 kg.
Operating conditions: Ambient temperature 5‑40 °C, ≤80 % relative humidity.
Certifications: TÜV‑certified safety (CE, cTUVus, FCC, RoHS, WEEE) – certified by TÜV‑Rheinland at the highest international certification levels; meets DIN/EN 60529 (IP code), IEC/EN 61010‑1 safety requirements for laboratory electrical equipment.

3. PHYSICAL & OPERATIONAL PROPERTIES

Construction: Durable die‑cast aluminium or metal housing with a powder‑coated finish for excellent chemical resistance, good heat dissipation, and reliable protection against corrosion. The IP21/IP42‑rated housing provides protection against solid foreign objects (>12.5 mm) and either vertically falling water drops (IP21) or splashing water from any direction (IP42). The housing is flame‑retardant and protects the internal electronics from chemical spills.
Work plate: 5‑inch (φ135 mm) stainless steel disc with durable ceramic coating – strong acid‑resistant, strong alkali‑resistant, high temperature‑resistant, with excellent thermal conductivity and chemical durability. Provides rapid, uniform heat distribution across the entire work plate surface.
Display: High‑contrast backlit LCD digital display simultaneously shows set temperature, actual temperature, stirring speed, actual time, and timer countdown status, providing complete operational visibility without toggling between parameters.
Operation: Simple, intuitive tactile button controls plus front‑panel label indicators. The user can set stirring speed (100‑1500 rpm), temperature (RT‑340 °C), timer value (1 min‑99 h 59 min), and also select the heating mode (A, B, or C) depending on the exact firmware/configuration. The instrument can be configured as a combined heating/stirring unit, a stirring‑only unit, or a heating‑only unit.
Heating technology: PID temperature controller (microprocessor‑controlled) provides stable, overshoot‑free temperature regulation, with or without the external PT1000 sensor. Three selectable heating modes (A: fast heating, B: standard heating, C: steady heating, depending on model/firmware) allow the operator to tailor the thermal profile to the sample’s specific requirements. Two independent safety circuits (dual‑independent design) continuously monitor the device; a separate, user‑settable safety temperature cut‑out (hardware cut‑off at 360 °C) provides redundant over‑temperature protection.
Stirring system: Maintenance‑free, spark‑free, explosion‑proof DC brushless motor drives strong rare‑earth magnets, providing powerful magnetic coupling and preventing stir bar decoupling even with viscous liquids or at high speeds across the 20‑litre capacity. The motor operates ultra‑quietly with minimal vibration and provides constant torque under all loads.
Programmable Timer: Integrated electronic timer from 1 minute to 99 hours 59 minutes. When the timer reaches zero, the unit stops heating (if heating was configured) but can be set to continue stirring (if stirring was enabled), allowing the sample to cool gently while remaining under agitation and preventing thermal degradation of heat‑sensitive samples. An audible buzzer (on some firmware versions) may sound at the end of the timer cycle.
Safety Functions:
- Dual independent safety circuits (redundant safety): Two separate safety circuits continuously monitor the device. When overheating is detected (user‑settable safety temperature, e.g., 360 °C cut‑off) or a built‑in sensor malfunctions, the unit 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.
- Adjustable safety temperature (user‑settable): The user can set a safety temperature (e.g., 360 °C). If the set safety temperature is exceeded, the system automatically stops heating, providing an extra layer of protection for sensitive samples and unattended operation.
- Residual “HOT” Heat Warning: The “HOT” safety indicator activates when the work plate temperature exceeds 50 °C and continues flashing on the LCD display even after the unit is turned off (if still connected to mains). This critical safety feature alerts users to a dangerously hot surface until the plate is safe to touch (temperature drops below 50 °C), protecting against delayed‑onset burns.
- Safety lock (front‑panel lock): The instrument incorporates a safety lock that prevents accidental changes to operating status once parameters are set, making it suitable for unattended operation.
- Multiple hardware protections: Includes overcurrent protection, ground fault protection, and (depending on the exact model) dry‑burning protection, ensuring failsafe operation even under adverse conditions.
- IP21/IP42 protection class: The IP‑rated housing provides protection against solid foreign objects >12.5 mm and either vertically falling water drops (IP21) or splashing water from any direction (IP42), ensuring reliable service in busy laboratory environments.
External Sensor Integration: PT1000 external temperature sensor port. When the optional PT1000 sensor (e.g., PT1000‑A, PT1000‑B, or PT1000‑C) is connected, the controller can regulate the heater based on the actual temperature of the liquid sample rather than just the plate surface temperature, providing higher precision (±0.2 °C) for sensitive applications. 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.
Remote Control and Data Logging (RS232): RS232 interface allows remote PC control and logging of temperature and speed data via computer software (e.g., DLAB StirPC), enabling full experiment documentation, GLP compliance, and integration into automated laboratory workflows.
Three‑Mode Heating (Optional Feature, depending on firmware): The instrument may feature three selectable heating modes: A (fast heating, rapid ramp‑up with some overshoot) – ideal for applications requiring quick temperature attainment; B (standard heating, balanced ramp‑up and overshoot) – suitable for most general‑purpose heating applications; C (steady heating, slow, precise ramp‑up with minimal overshoot) – designed for applications where the sample is extremely sensitive to temperature fluctuations and overshoot (e.g., protein studies, enzyme reactions, cell culture media preparation). Select the appropriate mode using the dedicated mode selection button on the control panel.
Maintenance: The DC brushless motor is maintenance‑free, requiring no routine brush replacement or lubrication. The ceramic‑coated stainless steel work plate is easy to clean with a mild detergent and soft, damp cloth, and resists both chemical attack and staining. The housing is corrosion‑resistant and easy to clean.

4. 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 has stopped flashing) before storage. Keep the work plate covered to prevent dust accumulation and protect against scratching.
Installation: Place the instrument on a stable, level, non‑flammable, heat‑resistant laboratory benchtop away from flammable materials, volatile solvents, combustible gases, and paper products. Allow at least 10 cm clearance on all sides for proper heat dissipation and ventilation. Do not use near water baths or sinks where splashing may occur. Do not place near strong magnetic fields (e.g., large magnets, NMR equipment).
Cleaning: Unplug the unit before cleaning. Allow the work plate to cool completely (verify “HOT” indicator has stopped flashing) before cleaning. Wipe the ceramic‑coated stainless steel work plate and the housing with a soft, damp cloth using a mild laboratory detergent or 70 % isopropyl alcohol. For stubborn residues, use a non‑abrasive cleaner suitable for ceramic coatings. Do not immerse the unit in liquid. Do not use abrasive cleaners, metal scouring pads, or sharp objects that could scratch the ceramic coating.
Pre‑use inspection: Before each use, inspect the power cord and plug for any damage. Ensure the work plate is clean, dry, and free of chemical residues. Verify that the area is clear of flammable materials and that the instrument has adequate clearance (at least 10 cm) for heat dissipation. Check that the magnetic stir bar is in good condition without chips or cracks and is appropriate for the vessel size (maximum length 80 mm). Verify that the PT1000 external sensor (if used) is fully functional and free of insulation damage.
Operation – Standard Stirring: Turn on the main power. Place the stirring vessel (e.g., a beaker or up to 20 L flask) centrally on the work plate and add the magnetic stir bar (maximum length 80 mm). Set the desired stirring speed (100‑1500 rpm) via the instrument’s digital control panel. The LCD display will show the actual speed. Always start stirring at a low speed (100‑200 rpm) to allow the stir bar to couple correctly before gradually increasing to the target speed. The instrument can be used in stirring‑only mode by setting the heating knob to “0”.
Operation – Heating‑Only or Combined Heating/Stirring: Turn on the main power. Set the desired temperature (room temperature‑340 °C, 1 °C increments) via the digital control panel. The LCD display shows both the set and actual temperature. The instrument can be used as a hotplate‑only (stirring speed at “0”) or as a combined hotplate stirrer. The heating function is independently controlled; when heating is turned on, an indicator light stays bright to prevent misoperation.
Setting the safety temperature: The user can set a safety temperature (e.g., 360 °C). Adjust the safety temperature via the control panel according to the manufacturer’s instructions. If the set safety temperature is exceeded, the instrument will automatically stop heating to protect the sample and ensure operator safety.
Operation with external sensor (PT1000, optional accessory): If using the optional PT1000 external temperature sensor, insert the sensor probe into the sample vessel and secure it with a suitable stand and clamp (e.g., PT1000 temperature probe support stand). 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.
Timer operation: Program the timer using the dedicated panel controls to set the desired heating and stirring duration. When the timer reaches zero, the unit stops heating but continues stirring (if stirring was enabled), and a buzzer may sound (depending on firmware). The stir bar remains engaged, allowing the sample to cool gently while remaining under agitation. This prevents thermal degradation of heat‑sensitive samples and eliminates the risk of sample damage due to sudden stoppage. Press any button to silence the buzzer. The timer can also be deactivated if not needed.
RS232 remote operation: For remote operation and data logging, connect the stirrer to a computer using a standard RS232 cable. Download and install the appropriate PC software according to the manufacturer’s instructions. The software interface allows full remote control of temperature, speed, and timer, as well as real‑time logging of operational parameters for GLP‑compliant documentation.
Cooling down: After use, turn off the main power and allow the work plate to cool completely. Cooling time may take 30‑60 minutes, depending on the operating temperature. Do not attempt to move, clean, or store the instrument until the “HOT” residual heat warning indicator has stopped flashing and the plate has cooled to a safe temperature (below 50 °C).
Periodic verification: Verify the temperature accuracy periodically using a calibrated external thermometer or thermocouple. If deviation from the setpoint exceeds the specified tolerance (±1 °C (<100 °C) or ±1 % (>100 °C)), consult the manufacturer’s service guidelines for recalibration.

SAFETY HANDLING PRECAUTIONS

1. SAFETY PRECAUTIONS

Burn Hazard — Hot Plate Surface: The ceramic‑coated stainless steel work plate can reach 340 °C and remains dangerously hot for an extended period after the power is turned off. Do not touch the work plate for at least 30‑60 minutes after use, or until the residual heat “HOT” indicator has stopped 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 is independent of the main power switch and alerts users to a 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.
Fire Hazard — Avoid Flammable Materials: Do not operate the hotplate stirrer 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 (user‑settable safety temperature cut‑off) 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 the user‑set safety temperature (typically 360 °C hardware cut‑off) or a built‑in sensor malfunctions, the unit 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.
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 IP‑rated housing offers protection against solid objects and vertically falling water drops/splashing water, but does not protect against immersion or significant liquid spills.
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.
Vessel and Stir Bar Selection: Use only flat‑bottomed vessels (beakers, Erlenmeyer flasks, crystallising dishes) that sit flush on the ceramic‑coated work plate. Ensure the magnetic stir bar is in good condition without chips, cracks, or deformities and is properly centered in the vessel before starting. Do not exceed the maximum stir bar length of 80 mm for the 20‑litre capacity.
Start Slowly (Smooth Start): Always start stirring at a low speed (100‑200 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.
Chemical Compatibility — Ceramic Coating Surface: The ceramic‑coated stainless steel 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 sulfuric acid) or aggressive reagents may degrade the surface. 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.
Spill Management — Prevent Liquids Entering Housing: If a liquid spill occurs on the work plate 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 IP‑rated housing 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 optional PT1000 external temperature sensor, insert the sensor probe into the sample vessel and secure it with a suitable stand and clamp. 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.
RS232 Remote Operation — Safe Connection: When using the RS232 interface for remote PC control, use a properly shielded RS232 cable to prevent electromagnetic interference. Ensure the PC is properly grounded. Do not leave the instrument unattended with remote control enabled without appropriate safety protocols.
Cleaning and Maintenance — Safe Cleaning Protocols: Unplug the unit and allow the work plate to cool completely (verify “HOT” indicator has stopped flashing) before cleaning. Wipe the ceramic‑coated work plate and the 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, metal scouring pads, or sharp objects that could scratch the ceramic coating. 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 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, handling large‑volume reactions, and the specific safety considerations for heating and stirring hazardous materials at high temperatures.

2. FIRST AID MEASURES

Burn from Hot Surface: If skin contacts the hot work plate 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 fire‑resistant housing is non‑flammable, but the power cord, internal wiring, electronic components, and plastic control elements are combustible. The ceramic‑coated work plate is non‑flammable. The primary fire hazard is the flammable chemicals, solvents, or materials being heated 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 with Timer (MS‑H‑ProT)

LCD Digital Heating Magnetic Stirrer with Timer (MS-H-ProT)

PRIMARY CLINICAL & DIAGNOSTIC USES

SECONDARY & SUPPORTIVE USES

1. BASIC IDENTIFICATION ATTRIBUTES

Device Type: A programmable, high‑precision LCD digital heating magnetic stirrer (hotplate stirrer) with a 5‑inch round ceramic‑coated work plate and full PID temperature control.

Designation: LCD Digital Heating Magnetic Stirrer with Timer (MS‑H‑ProT); DLAB MS‑H‑ProT; Scilogex MS‑H‑ProT.

Catalogue Numbers: 8030201110 (standard instrument); 8130231110 (Package 1, includes PT1000‑A and stand); 8130231110+18902044 (Package 2, includes PT1000‑A sensor and support clamp).

Key Components:

5‑inch (φ135 mm) stainless steel work plate with durable ceramic coating – strong acid‑resistant, strong alkali‑resistant, easy to clean, uniform heat distribution.

Maintenance‑free, spark‑free, explosion‑proof DC brushless motor (18 W input, 10 W output).

High‑resolution backlit LCD display – simultaneously shows set and actual values for temperature, speed, and timer status.

PID temperature controller (microprocessor‑controlled) with 340 °C maximum heating limit and 1 °C setpoint increments.

External PT1000 temperature sensor port (PT1000 accuracy ±0.2 °C) for closed‑loop sample temperature control.

Programmable electronic timer (1 min to 99 h 59 min) – stops heating at the end of a timed run (can be set to continue stirring).

RS232 data interface – remote PC control, real‑time monitoring, and data logging for GLP compliance.

Three selectable heating modes (A: fast heating, B: standard heating, C: steady heating, depending on model/firmware).

Independent residual heat warning (“HOT” flashes on display when plate >50 °C, continues even after unit is turned off if still connected to mains).

Dual independent safety circuits – over‑temperature protection (360 °C / 420 °C hardware cut‑off depending on model/source).

Safety lock – prevents accidental changes to operating status once parameters are set.

IP21 or IP42‑rated die‑cast aluminium or metal housing (depending on specification) – protection against solid foreign objects >12.5 mm and vertically falling water drops or splashing water.

Universal power supply (100‑120 V, 60 Hz / 200‑240 V, 50 Hz).

2. TECHNICAL & PERFORMANCE PROPERTIES

Work plate dimensions: φ135 mm (5 inches).

Work plate material: Stainless steel with ceramic coating – strong acid‑resistant, strong alkali‑resistant, durable, easy to clean, uniform heat distribution.

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

Motor rating input: 18 W.

Motor rating output: 10 W.

Maximum stirring capacity (H₂O): 20 litres.

Speed range: 100 to 1500 rpm (adjustable in 1 rpm increments).

Speed display: LCD digital display (actual speed).

Heating temperature range: Room temperature to 340 °C (adjustable in 1 °C increments).

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

Temperature display accuracy: ±0.1 °C.

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

Timer range: 1 minute to 99 hours 59 minutes (programmable via digital control panel).

Timer behaviour: When countdown finishes, unit stops heating (if heating was configured) but can be set to continue stirring to prevent thermal degradation of heat‑sensitive samples.

Heating output (resistance element): 500 W.

Total power consumption (heating + motor + electronics): 550 W (sources give 550 W to 720 W depending on model/spec – 550 W appears more common).

Hardware safety cut‑off temperature: 360 °C (or 420 °C depending on model/source) – two independent safety circuits; if this temperature is exceeded, the instrument automatically stops heating.

Residual heat warning: Activates above 50 °C; “HOT” flashes on display and continues even after unit is powered off (if still connected to mains) until plate cools below 50 °C.

Number of stirring positions: 1.

Maximum stir bar length: 80 mm.

Data interface: RS232 (remote PC control and data logging).

Protection class (IP rating): IP21 or IP42 (depending on specification – IP42 appears common in newer documentation) – protection against solid objects >12.5 mm and (for IP42) splashing water from any direction.

Power requirements: Universal input – 100‑120 V, 60 Hz / 200‑240 V, 50 Hz.

Dimensions (W × D × H): 160 × 280 × 100 mm (some sources give 280 × 160 × 85 mm) – the 160 × 280 × 100 mm dimension appears most consistent on DLAB‑branded materials.

Weight: 2.8 kg.

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

Certifications: TÜV‑certified safety (CE, cTUVus, FCC, RoHS, WEEE) – certified by TÜV‑Rheinland at the highest international certification levels; meets DIN/EN 60529 (IP code), IEC/EN 61010‑1 safety requirements for laboratory electrical equipment.

3. PHYSICAL & OPERATIONAL PROPERTIES

Display: High‑contrast backlit LCD digital display simultaneously shows set temperature, actual temperature, stirring speed, actual time, and timer countdown status, providing complete operational visibility without toggling between parameters.

Safety Functions:

Adjustable safety temperature (user‑settable): The user can set a safety temperature (e.g., 360 °C). If the set safety temperature is exceeded, the system automatically stops heating, providing an extra layer of protection for sensitive samples and unattended operation.

Safety lock (front‑panel lock): The instrument incorporates a safety lock that prevents accidental changes to operating status once parameters are set, making it suitable for unattended operation.

Multiple hardware protections: Includes overcurrent protection, ground fault protection, and (depending on the exact model) dry‑burning protection, ensuring failsafe operation even under adverse conditions.

IP21/IP42 protection class: The IP‑rated housing provides protection against solid foreign objects >12.5 mm and either vertically falling water drops (IP21) or splashing water from any direction (IP42), ensuring reliable service in busy laboratory environments.

Remote Control and Data Logging (RS232): RS232 interface allows remote PC control and logging of temperature and speed data via computer software (e.g., DLAB StirPC), enabling full experiment documentation, GLP compliance, and integration into automated laboratory workflows.

4. STORAGE & HANDLING ATTRIBUTES

Periodic verification: Verify the temperature accuracy periodically using a calibrated external thermometer or thermocouple. If deviation from the setpoint exceeds the specified tolerance (±1 °C (<100 °C) or ±1 % (>100 °C)), consult the manufacturer’s service guidelines for recalibration.

1. SAFETY PRECAUTIONS

Start Slowly (Smooth Start): Always start stirring at a low speed (100‑200 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.

2. FIRST AID MEASURES

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.

3. FIRE FIGHTING MEASURES

Related products

BRANDS

Catalogue Numbers: 8030201110 (standard instrument); 8130231110 (Package 1, includes PT1000‑A and stand); 8130231110+18902044 (Package 2, includes PT1000‑A sensor and support clamp).

5‑inch (φ135 mm) stainless steel work plate with durable ceramic coating – strong acid‑resistant, strong alkali‑resistant, easy to clean, uniform heat distribution.

Maintenance‑free, spark‑free, explosion‑proof DC brushless motor (18 W input, 10 W output).

PID temperature controller (microprocessor‑controlled) with 340 °C maximum heating limit and 1 °C setpoint increments.

External PT1000 temperature sensor port (PT1000 accuracy ±0.2 °C) for closed‑loop sample temperature control.

Programmable electronic timer (1 min to 99 h 59 min) – stops heating at the end of a timed run (can be set to continue stirring).

Independent residual heat warning (“HOT” flashes on display when plate >50 °C, continues even after unit is turned off if still connected to mains).

Dual independent safety circuits – over‑temperature protection (360 °C / 420 °C hardware cut‑off depending on model/source).

IP21 or IP42‑rated die‑cast aluminium or metal housing (depending on specification) – protection against solid foreign objects >12.5 mm and vertically falling water drops or splashing water.

Universal power supply (100‑120 V, 60 Hz / 200‑240 V, 50 Hz).

Work plate dimensions: φ135 mm (5 inches).

Motor rating input: 18 W.

Motor rating output: 10 W.

Maximum stirring capacity (H₂O): 20 litres.

Speed range: 100 to 1500 rpm (adjustable in 1 rpm increments).

Heating temperature range: Room temperature to 340 °C (adjustable in 1 °C increments).

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

Temperature display accuracy: ±0.1 °C.

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

Timer range: 1 minute to 99 hours 59 minutes (programmable via digital control panel).

Heating output (resistance element): 500 W.

Total power consumption (heating + motor + electronics): 550 W (sources give 550 W to 720 W depending on model/spec – 550 W appears more common).

Hardware safety cut‑off temperature: 360 °C (or 420 °C depending on model/source) – two independent safety circuits; if this temperature is exceeded, the instrument automatically stops heating.

Residual heat warning: Activates above 50 °C; “HOT” flashes on display and continues even after unit is powered off (if still connected to mains) until plate cools below 50 °C.

Maximum stir bar length: 80 mm.

Protection class (IP rating): IP21 or IP42 (depending on specification – IP42 appears common in newer documentation) – protection against solid objects >12.5 mm and (for IP42) splashing water from any direction.

Power requirements: Universal input – 100‑120 V, 60 Hz / 200‑240 V, 50 Hz.

Dimensions (W × D × H): 160 × 280 × 100 mm (some sources give 280 × 160 × 85 mm) – the 160 × 280 × 100 mm dimension appears most consistent on DLAB‑branded materials.

Weight: 2.8 kg.

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

Certifications: TÜV‑certified safety (CE, cTUVus, FCC, RoHS, WEEE) – certified by TÜV‑Rheinland at the highest international certification levels; meets DIN/EN 60529 (IP code), IEC/EN 61010‑1 safety requirements for laboratory electrical equipment.

Adjustable safety temperature (user‑settable): The user can set a safety temperature (e.g., 360 °C). If the set safety temperature is exceeded, the system automatically stops heating, providing an extra layer of protection for sensitive samples and unattended operation.

IP21/IP42 protection class: The IP‑rated housing provides protection against solid foreign objects >12.5 mm and either vertically falling water drops (IP21) or splashing water from any direction (IP42), ensuring reliable service in busy laboratory environments.

Start Slowly (Smooth Start): Always start stirring at a low speed (100‑200 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.