DLAB Scientific MS-H-Pro+ Heated Magnetic Stirrer

Overview

The DLAB Scientific MS-H-Pro+ Heated Magnetic Stirrer is an engineered laboratory instrument designed for precise, reproducible mixing and temperature-controlled sample processing under unattended operation. Based on the Couette flow principle, it utilizes a rotating magnetic field generated by a brushless DC motor to drive magnetic stir bars within vessels—enabling homogeneous dispersion without mechanical shaft penetration. Its integrated ceramic-coated stainless steel heating plate delivers rapid thermal response and uniform heat distribution across the entire surface, while dual independent safety circuits and configurable overtemperature protection ensure compliance with fundamental lab safety requirements. The system supports both internal plate-sensor control and external PT1000 probe feedback, allowing users to maintain target temperatures with ±0.2 °C accuracy in closed-loop mode—critical for viscosity-sensitive reactions, dissolution studies, or controlled crystallization protocols.

Key Features

• Brushless DC motor architecture ensures low noise, extended service life, and high torque stability across the full speed range (100–1500 rpm), with ±1 rpm digital speed resolution displayed on an integrated LCD.
• Ceramic-coated stainless steel heating plate (φ135 mm) provides corrosion resistance, thermal uniformity, and mechanical durability; rated for continuous operation up to 340 °C with programmable 1 °C increments.
• Dual redundant safety systems: primary electronic overtemperature cutoff at 360 °C and secondary hardware-based thermal fuse—both independently monitored and fail-safe.
• Configurable external temperature control via optional PT1000 sensor, enabling direct sample-temperature regulation rather than plate-surface approximation.
• Post-operation residual heat warning display alerts users to elevated plate surface temperature after shutdown, reducing burn risk during vessel removal.
• RS232 serial interface enables integration into automated lab environments for remote parameter setting, real-time data logging, and audit-trail generation—supporting GLP/GMP-aligned workflows.

Sample Compatibility & Compliance

The MS-H-Pro+ accommodates standard glassware including beakers (up to 20 L capacity with appropriate stir bar geometry) and round-bottom flasks. Compatible stir bars range up to 80 mm in length and are selected based on fluid viscosity and vessel geometry. The device conforms to DIN EN 60529 for ingress protection (IP42 rating), ensuring operational reliability in typical laboratory environments with ambient temperatures between 5–40 °C and relative humidity ≤80%. While not certified to IEC 61000-6-3 or FDA 21 CFR Part 11 out-of-the-box, its RS232 interface and deterministic control logic support validation pathways required for regulated quality control laboratories adhering to ISO/IEC 17025 or USP .

Software & Data Management

The MS-H-Pro+ operates as a standalone unit with embedded firmware controlling all thermal and rotational parameters. Through its RS232 port, it interfaces with third-party laboratory information management systems (LIMS) or custom SCADA platforms using ASCII command protocol. Logged parameters—including setpoints, actual speed, plate temperature, external probe temperature, and runtime—can be timestamped and exported for traceability. Audit trail functionality (e.g., user-initiated changes, safety event logs) may be implemented at the host software level, facilitating compliance with ALCOA+ data integrity principles when deployed in QC/QA settings.

Applications

• Controlled heating and stirring of reagent solutions prior to titration or spectroscopic analysis.
• Dissolution testing of pharmaceutical tablets under USP Apparatus II conditions (with appropriate vessel adaptation).
• Polymer solution homogenization and solvent evaporation kinetics studies requiring stable thermal gradients.
• Preparation of calibration standards and buffer solutions where temperature-dependent pH or conductivity must be maintained.
• Cell culture media warming and gentle suspension of sensitive biological suspensions without shear-induced damage.

FAQ

Can the MS-H-Pro+ be used with corrosive solvents such as concentrated acids or halogenated organics?
Yes—provided appropriate chemical-resistant stir bars (e.g., PTFE- or ETFE-coated) and borosilicate glassware are used. The ceramic coating on the heating plate resists mild chemical exposure but should not be subjected to prolonged contact with strong oxidizers or molten alkalis.
Is the RS232 interface compatible with modern Windows/Linux-based lab automation software?
Yes—the device uses standard TTL-level RS232 signaling with configurable baud rates (default 9600 bps, 8N1). Drivers and command documentation are available from DLAB Scientific for integration with LabVIEW, Python (pySerial), or commercial LIMS platforms.
Does the unit meet electromagnetic compatibility (EMC) requirements for use in analytical instrument suites?
It complies with basic emission limits per CISPR 11 Group 1 Class B, suitable for laboratory use adjacent to HPLC or GC systems. For ultra-low-noise environments (e.g., near NMR spectrometers), physical separation and shielded cabling are recommended.
What is the warranty coverage and service support structure outside China?
DLAB Scientific offers a 24-month limited warranty on parts and labor. International technical support and certified calibration services are coordinated through authorized regional distributors, with firmware updates and compliance documentation accessible via secure customer portal.