DLAB MS-H-S Standard Heating Magnetic Stirrer

Overview

The DLAB MS-H-S Standard Heating Magnetic Stirrer is an engineered solution for precise, reproducible mixing and temperature-controlled sample preparation in analytical, pharmaceutical, quality control, and academic laboratories. Utilizing a permanent rare-earth magnet coupling system and brushless DC motor architecture, it delivers consistent torque transfer across variable viscosities — from low-viscosity aqueous solutions to moderately viscous organic solvents or polymer precursors. Its integrated heating element enables direct conductive heating of vessels placed on the ceramic-coated stainless steel plate, supporting applications requiring simultaneous agitation and thermal conditioning up to 340 °C. Designed for single-vessel operation, the unit meets fundamental ISO/IEC 17025-aligned lab equipment requirements for traceability, stability, and operational safety under routine use conditions.

Key Features

• High-torque neodymium magnetic drive ensures stable rotation of stir bars up to 80 mm in length, even in media with dynamic viscosities exceeding 500 mPa·s
• Brushless DC motor eliminates carbon brush wear, enabling maintenance-free operation and intrinsic spark-free performance suitable for solvent-rich or classified environments
• Digital PID temperature control with ±5 °C accuracy over full range (ambient to 340 °C); real-time digital display with residual heat warning indicator post-shutdown
• Ceramic-coated 135 mm stainless steel workplate resists corrosion from acids (e.g., HCl, HNO₃), bases (e.g., NaOH), and organic solvents (e.g., acetone, DMF), extending service life in multi-chemistry workflows
• Overtemperature cutoff at 350 °C prevents thermal runaway; conforms to DIN/EN 60529 IP42 rating for protection against solid objects ≥1 mm and vertically falling water droplets
• Integrated timer function supports unattended operation for defined durations (0–999 min), enhancing protocol repeatability in dissolution testing or reaction kinetics studies

Sample Compatibility & Compliance

The MS-H-S accommodates standard laboratory glassware including beakers (50–2000 mL), round-bottom flasks (up to 5 L), and custom reaction vessels compatible with magnetic stirring. It is validated for use with PTFE- or glass-coated stir bars and supports external PT100 probe integration for closed-loop temperature feedback. The device complies with CE, cTUVus, and FCC electromagnetic compatibility and electrical safety directives. Its construction and thermal management align with general-purpose laboratory equipment provisions under ISO 15195 (reference measurement laboratories) and supports GLP documentation practices through manual log entry of setpoints, duration, and observed plate temperatures.

Software & Data Management

The MS-H-S operates via embedded firmware without proprietary software dependency. All parameters — speed, temperature setpoint, timer value, and status indicators — are displayed on a dual-line LED interface. While it lacks USB or RS232 connectivity, its analog control architecture ensures electromagnetic resilience in proximity to sensitive instrumentation (e.g., NMR, mass spectrometers). For regulated environments requiring audit trails, users may document operational parameters manually or integrate with external data loggers via optional analog output modules (sold separately). The unit satisfies baseline requirements for FDA 21 CFR Part 11 adherence when used within documented SOPs that define calibration frequency, verification checks, and maintenance records.

Applications

• Homogenization of buffer solutions and reagent stocks in molecular biology and clinical diagnostics labs
• Heated dissolution testing per USP guidelines using calibrated vessels and standardized stir bar geometry
• Precipitation reactions requiring controlled thermal ramping and continuous mixing in inorganic synthesis
• Preparation of calibration standards for ICP-OES and AAS where matrix uniformity and temperature stability directly impact detection limits
• Viscosity-independent mixing during HPLC mobile phase preparation involving acetonitrile/water gradients
• Support of ASTM D2196 (rheological behavior of non-Newtonian fluids) preliminary sample conditioning steps

FAQ

Does the MS-H-S support external temperature feedback control?
Yes — it accepts input from optional PT100 sensors for enhanced thermal accuracy in critical applications.
Is the workplate compatible with aggressive cleaning agents such as sodium hypochlorite or piranha solution?
The ceramic coating provides resistance to common lab decontaminants, though prolonged exposure to piranha solution is not recommended due to potential oxide layer degradation.
Can this stirrer be operated inside a fume hood with continuous airflow?
Yes — its IP42-rated enclosure and brushless motor design ensure reliable operation under typical fume hood ventilation conditions.
What is the recommended recalibration interval for temperature and speed verification?
DLAB recommends annual verification against NIST-traceable references, or prior to high-precision experiments, per internal quality procedures.
Are replacement stir bars and ceramic workplate protectors available as consumables?
Yes — DLAB offers OEM-certified stir bars (lengths 30–80 mm) and removable ceramic inserts to extend platform longevity.