DLAB MS-PB Digital Magnetic Stirrer

Overview

The DLAB MS-PB Digital Magnetic Stirrer is a compact, single-position laboratory stirrer engineered for precision mixing of low-viscosity aqueous and organic solutions in routine benchtop applications. Utilizing a permanent magnet rotor driven by a brushless DC motor, the MS-PB generates a rotating magnetic field beneath a chemically inert nylon+glass fiber (GF) plate to induce controlled rotation of standard PTFE- or glass-coated magnetic stir bars. Its design emphasizes operational stability, electrical safety, and compatibility with standard laboratory glassware—particularly beakers and flasks up to 3 L capacity. Unlike hotplate stirrers, the MS-PB provides purely mechanical agitation without integrated heating, making it ideal for temperature-sensitive protocols where thermal drift must be avoided. The device complies with international safety standards including CE, cTUVus, and FCC, and meets the mechanical ingress protection requirements of IP42 per DIN/EN 60529—ensuring resistance to limited dust ingress and vertically falling water droplets.

Key Features

• Digital speed control with analog scale readout enabling precise adjustment across a continuous 0–1500 rpm range
• Chemically resistant working surface composed of reinforced nylon with 20% glass fiber (GF), offering high dimensional stability and abrasion resistance under repeated chemical exposure
• Low-power DC motor architecture delivering consistent torque at low speeds while minimizing electromagnetic interference (EMI) and thermal load
• Compact footprint (260 × 150 × 80 mm) and lightweight construction (1.8 kg) optimized for crowded fume hoods and shared lab benches
• Universal dual-voltage input (100–120 V / 200–240 V, 50/60 Hz) supporting global deployment without external transformers
• Single-stirring-position configuration with support for stir bars up to 50 mm in length, ensuring optimal coupling efficiency for volumes from 50 mL to 3 L (water-equivalent)

Sample Compatibility & Compliance

The MS-PB accommodates standard cylindrical and oval stir bars (e.g., 20–50 mm length, 6–10 mm diameter) within borosilicate glass, polypropylene, or PTFE-lined vessels. It is validated for use with aqueous buffers, saline solutions, ethanol/water mixtures, and dilute organic solvents under ambient conditions. The device does not support viscous media (>100 mPa·s) or heterogeneous suspensions requiring high shear. All electrical and mechanical safety assessments conform to EN 61010-1:2010 for laboratory equipment, and its certification portfolio includes CE (EU Machinery Directive 2006/42/EC), cTUVus (UL 61010-1, CSA C22.2 No. 61010-1), and FCC Part 15 Subpart B for electromagnetic compatibility. The IP42 rating confirms suitability for general-purpose labs operating within ISO 14644 Class 8 cleanroom-adjacent environments.

Software & Data Management

The MS-PB operates as a standalone analog-controlled instrument with no embedded microprocessor, firmware, or digital interface. Consequently, it does not feature data logging, remote control, or software integration capabilities. This architecture eliminates cybersecurity risks associated with networked lab devices and ensures long-term reliability without dependency on proprietary drivers or OS-specific utilities. Speed settings are manually selected and retained via mechanical potentiometer positioning; no calibration certificate or audit trail is generated. As such, the unit meets minimal regulatory requirements for non-GxP environments but is not compliant with FDA 21 CFR Part 11 or EU Annex 11 for electronic records and signatures.

Applications

• Homogenization of reagent solutions prior to pH measurement or titration
• Preparation of buffer stocks and cell culture media in microbiology and molecular biology workflows
• Stirring during dissolution testing of pharmaceutical excipients (non-heated protocols)
• Supporting gravimetric analysis procedures requiring uniform suspension of precipitates
• Use in educational laboratories for teaching fundamental fluid dynamics and mass transfer principles
• Integration into automated liquid handling systems where external trigger-based start/stop is managed via dry-contact relay signals (optional accessory)

FAQ

Does the MS-PB include a heating function?
No. The MS-PB is a magnetic stirrer only and does not incorporate any heating element or temperature control capability.
What is the maximum viscosity this stirrer can handle effectively?
It is optimized for low-viscosity liquids (≤50 mPa·s). Performance degrades significantly above 100 mPa·s due to reduced magnetic coupling efficiency and motor torque limitations.
Is the stirrer compatible with corrosive solvents like concentrated acids or bases?
The nylon+GF plate offers good resistance to mild acids and alkalis, but prolonged exposure to strong oxidizers (e.g., HNO₃, H₂O₂) or halogenated solvents is not recommended.
Can multiple MS-PB units be daisy-chained or synchronized?
No. Each unit operates independently with no communication interface or synchronization circuitry.
What documentation is provided for quality assurance purposes?
A Declaration of Conformity (DoC) covering CE, cTUVus, and FCC certifications is supplied. Factory calibration reports and traceable metrology certificates are not included but may be requested as optional services.