DLAB MS-PA 3L Digital Magnetic Stirrer
| Brand | DLAB |
|---|---|
| Origin | Beijing, China |
| Model | MS-PA 3L |
| Maximum Stirring Volume | 3 L |
| Speed Range | 200–1500 rpm |
| Display | LED (set speed & actual speed) |
| Plate Diameter | 135 mm |
| Plate Material | Nylon + Glass Fiber Reinforced Plastic |
| Motor Type | DC Motor |
| Input Power | 5 W |
| Output Power | 3 W |
| Rated Power | 15 W |
| Voltage | 100–240 VAC |
| Frequency | 50/60 Hz |
| Protection Rating | IP42 |
| Dimensions (W×D×H) | 150 × 260 × 80 mm |
| Weight | 1.8 kg |
| Operating Temperature | 5–40 °C |
| Relative Humidity Limit | ≤80% RH |
| Max Stir Bar Length | 50 mm |
Overview
The DLAB MS-PA 3L Digital Magnetic Stirrer is a compact, single-position benchtop instrument engineered for precision mixing of low-to-medium viscosity aqueous and organic solutions in academic, quality control, and R&D laboratories. It operates on the principle of magnetic coupling: a rotating permanent magnet beneath the chemically inert polymer plate induces synchronous rotation of a magnetic stir bar immersed in the sample vessel. Unlike overhead mechanical stirrers, this design eliminates shaft seals, reduces contamination risk, and enables operation under sealed or inert-atmosphere conditions. The unit features microprocessor-based closed-loop speed control—continuously monitoring back-EMF from the DC motor to dynamically adjust drive current and maintain setpoint accuracy across load variations. Its all-enclosed flame-retardant housing (UL94 V-0 rated plastic) complies with IEC 61010-1 safety requirements for laboratory electrical equipment.
Key Features
- Dual LED display showing both set speed and real-time measured speed—enabling immediate verification of operational fidelity
- Stable speed regulation with ±3% repeatability over full 200–1500 rpm range, validated per ASTM E2500-17 guidelines for laboratory equipment performance qualification
- 135 mm diameter stirring plate fabricated from nylon-glass fiber composite—resistant to thermal deformation, chemical splashes (including dilute acids/bases), and mechanical abrasion
- Integrated thermal cut-off circuitry prevents overheating during extended operation; automatic restart inhibition until ambient temperature normalizes
- Universal AC input (100–240 VAC, 50/60 Hz) ensures compatibility with global power infrastructures without external transformers
- IP42-rated enclosure provides protection against solid objects ≥1 mm and vertically falling water droplets—suitable for standard wet-lab environments
Sample Compatibility & Compliance
The MS-PA accommodates standard glassware up to 3 L capacity—including beakers, Erlenmeyer flasks, and jacketed reactors—with optimal performance observed using PTFE- or glass-coated stir bars up to 50 mm in length. It is not intended for highly viscous media (>500 mPa·s), abrasive suspensions, or exothermic reactions exceeding 40 °C ambient. The device conforms to EN 60529 (IP42), IEC 61010-1 (Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use), and RoHS Directive 2011/65/EU. While not certified for GMP or GLP-regulated workflows, its consistent speed output and stable thermal profile support method transfer in non-critical preparatory steps compliant with ISO/IEC 17025:2017 clause 6.4.3 (Equipment Management).
Software & Data Management
This is a standalone analog-controlled instrument with no embedded firmware, network interface, or data logging capability. All operational parameters are adjusted manually via front-panel rotary encoder and confirmed visually on the dual-line LED display. No software installation, driver dependencies, or cybersecurity protocols apply. For laboratories requiring audit trails or electronic records, external USB-connected data loggers (e.g., Omega OM-DAQPRO-5300 series) may be interfaced via optional analog voltage output modules—not supplied with the base unit.
Applications
- Preparation of buffer solutions, culture media, and reagent dilutions in molecular biology and microbiology labs
- Homogenization of catalyst slurries prior to filtration in synthetic chemistry workflows
- pH adjustment and titrant mixing during standardized acid-base titration setups
- Supporting dissolution testing in pharmaceutical pre-formulation studies (non-GLP)
- Facilitating uniform temperature distribution in water baths when used with thermally conductive plates
- Low-risk solvent blending in analytical sample preparation where mechanical agitation introduces foam or volatilization concerns
FAQ
Does the MS-PA include temperature control or heating functionality?
No. This model is a non-heated magnetic stirrer only. DLAB offers separate heated stirrer variants (e.g., MS-H-Pro series) for applications requiring simultaneous mixing and thermal regulation.
Can it operate continuously for 24 hours?
Yes—under nominal load (≤2 L water, 20–25 °C ambient) and within specified humidity limits (≤80% RH). Continuous operation beyond 8 hours is not recommended without periodic cooling intervals.
Is calibration required or supported?
Speed calibration is not user-serviceable. DLAB recommends annual verification using a traceable optical tachometer per ISO/IEC 17025 clause 6.5.2; no internal calibration routine exists.
What stir bar size is optimal for maximum efficiency at 1500 rpm?
A 30 mm PTFE-coated stir bar provides best torque transfer and vortex stability at high speeds; longer bars (>40 mm) may induce wobble or uneven mixing above 1200 rpm.
Is the unit compatible with corrosive solvents like chloroform or acetone?
The plate surface resists brief exposure, but prolonged contact with strong organics may degrade the nylon-GF matrix. Use secondary containment and avoid direct spillage on the housing.
