DLAB MS-M-S4 / MS-M-S6 Multi-Channel LCD Digital Magnetic Stirrer

Overview

The DLAB MS-M-S4 and MS-M-S6 are precision-engineered multi-channel digital magnetic stirrers designed for high-throughput laboratory workflows requiring parallel thermal and mechanical control. Unlike conventional single-station units, these instruments integrate four or six independently operated stirring positions on a single compact chassis—each equipped with dedicated speed regulation, temperature control, real-time LCD feedback, and autonomous safety monitoring. The system operates on the principle of rotating magnetic fields generated beneath a thermally conductive ceramic-coated aluminum plate, which couples with PTFE- or glass-coated magnetic stir bars immersed in vessels. This architecture enables simultaneous, non-contact agitation and precise conductive heating of up to six samples—ideal for reaction screening, dissolution testing, buffer equilibration, and kinetic studies where inter-sample consistency and temporal alignment are critical.

Key Features

• Independent channel control: Each of the 4 (MS-M-S4) or 6 (MS-M-S6) positions features discrete adjustment of speed (200–1500 rpm) and heating setpoint, with ±20 rpm speed accuracy and real-time LCD readout per channel.
• Ceramic-coated aluminum heating plate: Offers rapid thermal response, uniform heat distribution, and resistance to chemical corrosion from common solvents and aqueous reagents.
• Brushless DC motor design: Eliminates carbon brush wear, arcing, and electromagnetic interference—ensuring long service life, silent operation, and intrinsic safety in flammable environments.
• Dual-redundant safety architecture: Two independent thermal monitoring circuits continuously verify plate temperature and sensor integrity; automatic power cutoff occurs upon overtemperature detection, sensor failure, or internal short circuit.
• HOT residual heat warning: Persistent “HOT” LED indication remains active on the display—even after main power disconnection—when surface temperature exceeds 50 °C, preventing accidental contact burns.
• Compact footprint and modular compatibility: Optimized layout supports standard round-bottom flasks, beakers, and custom reaction blocks; both models meet IP21 ingress protection requirements for lab bench use.

Sample Compatibility & Compliance

The MS-M-S4/S6 accommodates vessels ranging from 10 mL test tubes to 3 L beakers per position, provided magnetic stir bars (up to 40 mm length) are appropriately sized and centered. The ceramic plate surface is compatible with borosilicate glass, stainless steel, and polypropylene containers. No moving parts contact samples, eliminating cross-contamination risk and enabling sterile or anaerobic applications when paired with sealed vessel lids. From a regulatory standpoint, the dual-circuit thermal protection, fail-safe shutdown logic, and stable PID temperature regulation align with general laboratory equipment safety expectations under IEC 61010-1 (Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use). While not certified for GMP manufacturing environments out-of-the-box, its deterministic behavior, non-volatile error logging, and absence of user-serviceable high-voltage components support validation protocols required for GLP-compliant research settings.

Software & Data Management

These units operate as standalone hardware with no embedded firmware-based data logging or PC connectivity. All operational parameters—including setpoints, actual speed/temperature values, and fault codes—are displayed locally via integrated LCD modules. For traceability in regulated workflows, users may implement external recording solutions (e.g., USB-connected thermocouple loggers or camera-based screen capture) to document time-stamped performance. The consistent repeatability of PID-controlled heating (±1 °C typical stability at 80 °C in water) and fixed-speed rotor dynamics ensures high inter-run reproducibility without software dependency—making it suitable for SOP-driven environments where simplicity and reliability supersede digital integration.

Applications

• Parallel synthesis optimization across solvent systems or catalyst loadings
• Dissolution rate profiling per USP using multiple USP Apparatus 2 vessels
• pH buffer preparation and equilibration across calibration standards
• Cell culture media warming and homogenization prior to sterile filtration
• Enzyme kinetics assays requiring synchronized initiation across replicates
• Quality control testing of viscosity modifiers or dispersants under controlled thermal conditions

FAQ

Can the MS-M-S6 accommodate different-sized stir bars simultaneously across channels?

Yes—each channel operates independently, allowing distinct stir bar geometries and materials (e.g., PTFE-coated, elliptical, or micro-size) to be used based on vessel dimensions and viscosity requirements.
Is an external temperature probe required for accurate liquid temperature control?

The unit uses surface-sensing only; for precise bulk liquid temperature regulation—especially above 60 °C or with low-thermal-conductivity solvents—an optional external PT100 probe (sold separately) can be connected to enable feedback-controlled immersion sensing.
Does the device support continuous unattended operation overnight?

Yes—its dual thermal protection, spark-free motor, and stable PID algorithm make it suitable for extended无人值守 operation, provided ambient conditions remain within 5–40 °C and relative humidity does not exceed 80%.
What maintenance is required for long-term reliability?

No routine maintenance is needed—the brushless motor contains no consumables, and the ceramic plate requires only periodic wipe-down with isopropyl alcohol to remove residue; no lubrication or recalibration is specified by the manufacturer.
Are replacement heating plates available as spare parts?

Yes—DLAB supplies certified replacement ceramic-coated aluminum plates (part numbers MS-PLATE-S4 and MS-PLATE-S6) with full electrical and thermal certification matching original equipment specifications.