Unattended Operation

The Magnetic Hotplate Stirrer (DMS4-550) is a high-performance, programmable benchtop instrument engineered for reliable, precise, and safe simultaneous heating and stirring in clinical diagnostics, pharmaceutical quality control, analytical chemistry, trace element analysis, and life science research. Combining a maximum stirring capacity of 10 liters with a powerful heating capability up to 550°C on a 4-inch (100×100 mm) glass ceramic work plate, the DMS4-550 is the ideal choice for demanding laboratory applications including sample digestion with strong acids, culture media preparation, protein denaturation, and chemical synthesis.

Every Magnetic Hotplate Stirrer (DMS4-550) is equipped with a high-resolution LCD display that simultaneously shows the set and actual values for both temperature and speed, a maintenance-free spark-free brushless DC motor, and a PID temperature controller for stable, precise heating. The glass ceramic work plate provides exceptional chemical resistance against strong acids and strong alkalis, ensuring long-term durability even with aggressive reagents such as concentrated nitric acid for trace metal digestion. With an integrated PT1000 external temperature sensor port (±0.2°C accuracy), users can accurately control sample temperature, making it suitable for temperature-sensitive assays and enzyme kinetics.

Key user-focused features include three selectable heating modes—fast heating, standard heating, and stable heating—allowing users to choose the optimal thermal profile for their specific application. The programmable timer, ranging from 1 minute to 99 hours 59 minutes, enables unattended operation with automatic shutdown and audible alert. Safety is paramount with dual independent safety circuits providing redundant over-temperature protection, an independent residual heat warning ("HOT" indicator lights up at >50°C and stays on even after the unit is turned off), a safety lock to prevent accidental setting changes, and an RS232 data interface for remote PC control and data logging. The corrosion-resistant full-metal housing with waterproof edge design provides heat dissipation, fire protection, and spill containment.

For the clinical laboratory scientist, trace element analysis technologist, and pharmaceutical quality control analyst, the Magnetic Hotplate Stirrer (DMS4-550) delivers the programmable, precise, and safe heating and stirring required for clinical chemistry sample digestion, trace metal analysis sample preparation (blood lead, urine cadmium), culture media preparation, enzyme activity assays, and drug dissolution testing. For the patient, the reliable performance of this instrument ensures that diagnostic tests for heavy metal toxicity, nutritional deficiencies, infectious diseases, and pharmaceutical products are accurate and reproducible, directly supporting effective clinical decision-making, appropriate treatment selection, and patient safety.