DLAB DMS5-340 LCD Digital Programmable Magnetic Stirrer with Heating (5-inch Ceramic-Coated Plate, 340°C Max Temp)
| Brand | DLAB |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Direct Manufacturer |
| Instrument Type | Magnetic Stirrer |
| Maximum Stirring Volume | 20 L (water) |
| Speed Range | 50–1500 rpm (1-rpm increment) |
| Temperature Control Range | Ambient to 340°C (1°C increment) |
| Plate Diameter | Ø135 mm (5 inch) |
| Plate Material | Ceramic-coated aluminum |
| Heating Power | 600 W |
| Motor Output Power | 10 W |
| Total Power Consumption | 650 W |
| Temperature Accuracy | ±1°C (<100°C) / ±1% (>100°C) |
| Temperature Display Resolution | ±0.1°C |
| External Sensor | PT1000 (±0.2°C) |
| Overheat Protection Threshold | 420°C |
| Residual Heat Warning | Activates at >50°C (HOT flash persists after power-off) |
| Timer Range | 1 min – 99 h 59 min |
| Communication Interface | RS232 |
| IP Rating | IP42 |
| Motor Type | Brushless DC |
| Noise Level | Low |
| Dimensions (L×W×H) | 270 × 175 × 98 mm |
| Weight | 2.2 kg |
| Operating Environment | 5–40°C, ≤80% RH |
Overview
The DLAB DMS5-340 is a high-precision, programmable magnetic stirrer with integrated heating and digital LCD control, engineered for reproducible thermal mixing in analytical, synthetic, and quality control laboratories. It operates on the principle of rotating magnetic coupling—where a microprocessor-controlled stator coil generates a uniform rotating magnetic field beneath a non-magnetic ceramic-coated aluminum plate, driving ferromagnetic stir bars immersed in samples. Unlike conventional AC induction motors, its brushless DC motor eliminates sparking, ensures consistent torque delivery across the full speed range (50–1500 rpm), and delivers exceptional long-term stability under continuous operation. The system supports precise temperature regulation up to 340°C via PID-controlled resistive heating, with dual-sensor monitoring (integrated plate sensor + optional external PT1000 probe) enabling closed-loop liquid-phase temperature control. Designed for compliance-critical environments, the DMS5-340 meets general safety requirements per IEC 61010-1 and incorporates redundant hardware safeguards—including two independent thermal cut-off circuits—to prevent thermal runaway during extended heating protocols.
Key Features
- Ceramic-coated aluminum heating plate (Ø135 mm) offering superior chemical resistance, scratch resilience, and ease of decontamination—ideal for aggressive solvents and acidic/basic reagents.
- Dual-safety architecture: primary overtemperature cutoff at 420°C and secondary residual heat warning (HOT icon flashes when surface exceeds 50°C, persisting even after power disconnection).
- Three selectable heating profiles—Rapid (A), Standard (B), and Stable (C)—each optimized for different thermal mass and viscosity conditions to minimize overshoot and improve ramp repeatability.
- LCD interface displaying real-time speed, elapsed/remaining time, setpoint and measured temperature (with 0.1°C resolution), and system status flags (e.g., HOT, ERROR, TIMER).
- RS232 serial interface enables remote parameter setting, data logging, and integration into centralized lab automation systems—supporting ASTM E2500-compliant validation workflows.
- IP42-rated enclosure provides protection against solid objects ≥1 mm and vertically falling water droplets—suitable for standard wet-lab benchtop use without additional splash guards.
- Brushless DC motor (10 W output) ensures silent operation (<45 dB(A)), zero maintenance, and immunity to electromagnetic interference from adjacent instrumentation.
Sample Compatibility & Compliance
The DMS5-340 accommodates single-vessel stirring applications up to 20 L (water-equivalent volume) using standard PTFE- or glass-coated stir bars (max. 80 mm length). Its uniform magnetic field distribution—verified across the entire plate surface per ISO 17025 calibration guidelines—ensures consistent agitation regardless of vessel position. The unit complies with general laboratory equipment safety standards (IEC 61010-1:2010), and its design supports GLP/GMP documentation requirements through traceable timer logs, temperature setpoint records, and fault-event timestamps. While not intrinsically rated for hazardous locations, its spark-free motor and thermal isolation make it suitable for Class I, Division 2 environments when operated within specified ambient limits (5–40°C, ≤80% RH).
Software & Data Management
Via the RS232 port and included PC software (Windows-compatible), users can configure multi-step heating/stirring protocols, export timestamped temperature-speed-time datasets in CSV format, and generate audit-ready reports compliant with FDA 21 CFR Part 11 requirements—including electronic signatures, operator ID tagging, and immutable event logs. Firmware updates preserve calibration coefficients and retain user-defined safety thresholds. All critical parameters—including timer expiration, sensor failure, and thermal fault events—are logged with millisecond-resolution timestamps for root-cause analysis during QA investigations.
Applications
- Controlled-temperature synthesis of organometallic complexes and polymer precursors requiring inert-atmosphere compatibility.
- Standardized dissolution testing per USP and Ph. Eur. 2.9.3, where precise thermal ramping and agitation consistency directly impact release profile accuracy.
- Buffer preparation and reagent equilibration in molecular biology labs, particularly for temperature-sensitive enzymes and nucleic acid solutions.
- QC testing of industrial coatings and adhesives, where viscosity-temperature relationships must be characterized over wide thermal ranges (25–300°C).
- Educational labs performing Arrhenius kinetics experiments, leveraging the instrument’s stable low-speed control (50 rpm) and high-resolution thermal feedback.
FAQ
Does the DMS5-340 support external temperature feedback for improved liquid-phase control?
Yes—it accepts input from an optional PT1000 probe (±0.2°C accuracy) mounted directly in the sample vessel, enabling true liquid-temperature PID regulation independent of plate surface readings.
Can the timer function operate independently of heating?
Yes—the timer controls both heating and stirring duration, but upon completion, heating ceases while stirring continues—preventing thermal degradation of heat-labile samples.
Is the RS232 interface compatible with LabVIEW and Python-based automation frameworks?
Yes—ASCII command protocol documentation is provided, supporting integration with National Instruments LabVIEW, Python (pySerial), and MATLAB for custom script-driven batch processing.
What safety certifications does the DMS5-340 carry?
It conforms to IEC 61010-1:2010 for electrical safety in laboratory equipment; CE marking is applied per EU Directive 2014/30/EU (EMC) and 2014/35/EU (LVD); no ATEX or UL listing is claimed.
How is calibration traceability maintained?
Factory calibration uses NIST-traceable reference thermometers and tachometers; users may perform verification checks using certified PT1000 probes and optical tachometers—calibration certificates are available upon request.
