SCILOGEX MS-PB Precision Heating Magnetic Stirrer

Overview

The SCILOGEX MS-PB Precision Heating Magnetic Stirrer is a compact, microprocessor-controlled laboratory instrument engineered for reliable, repeatable mixing of low- to medium-viscosity aqueous and organic solutions under ambient or elevated temperature conditions. Unlike basic stirrers relying on open-loop speed control, the MS-PB employs closed-loop feedback regulation—monitoring actual rotor speed via Hall-effect sensing and dynamically adjusting motor drive current to maintain setpoint accuracy across load variations. Its integrated heating plate delivers uniform thermal distribution over the Ø135 mm plastic work surface, enabling simultaneous stirring and temperature conditioning up to 150 °C (dependent on vessel geometry and heat transfer efficiency). Designed for routine benchtop use in QC labs, academic teaching facilities, and R&D environments, the unit complies with IEC/EN 61010-1 safety standards for electrical equipment used in laboratory settings and meets DIN EN 60529 IP42 ingress protection requirements for limited dust and drip resistance.

Key Features

• Microprocessor-based closed-loop speed control ensures ±3% speed stability across the full 0–1500 rpm range, even during viscosity transitions or volume changes.
• Flame-retardant thermoplastic housing (UL94 V-0 rated) provides electrical insulation, chemical resistance, and mechanical durability without metallic heat sink complications.
• Integrated heating plate with proportional temperature regulation supports gradual ramping and stable plateau maintenance; surface temperature uniformity is optimized via embedded resistive trace layout.
• Low-noise brushed DC motor (3 W output, 5 W input) delivers consistent torque at low speeds while minimizing electromagnetic interference with adjacent instrumentation.
• IP42-rated enclosure protects internal electronics from incidental splashes and particulate ingress during standard lab handling.
• Universal 100–240 VAC, 50/60 Hz power supply enables global deployment without voltage converters or frequency adapters.

Sample Compatibility & Compliance

The MS-PB accommodates standard glass, borosilicate, and polypropylene vessels up to 3 L capacity when paired with appropriately sized stir bars (up to 50 mm length). Its plastic plate surface eliminates galvanic corrosion risks associated with metal plates when used with acidic or saline media. The system supports GLP-compliant workflows through stable, documented operating parameters—though it does not include audit-trail logging or user-access controls required for FDA 21 CFR Part 11 environments. It conforms to EN 61010-1:2010+A1:2019 for laboratory electrical safety and carries CE marking per the EU Low Voltage Directive (2014/35/EU) and EMC Directive (2014/30/EU).

Software & Data Management

The MS-PB operates as a standalone analog-digital hybrid instrument with no embedded firmware update capability or PC connectivity. Speed and heating setpoints are adjusted manually via dual rotary dials with tactile feedback; real-time speed is indicated by a calibrated analog scale (0–1500 rpm), eliminating reliance on digital displays prone to calibration drift. No software installation, driver configuration, or data export functionality is provided—consistent with its design intent as a deterministic, low-maintenance utility device for non-regulated applications. For laboratories requiring traceable parameter recording, external USB data loggers interfaced with PT100 probes and tachometers may be deployed in parallel.

Applications

• Buffer and reagent preparation in molecular biology and immunoassay workflows.
• Dissolution testing of pharmaceutical excipients and active ingredients under controlled thermal conditions.
• Homogenization of catalyst suspensions in synthetic chemistry protocols.
• Standardization of calibration standards for spectrophotometry and titration.
• Pre-incubation mixing of cell culture media prior to sterile filtration.
• Teaching laboratory demonstrations of fluid dynamics, heat transfer, and rotational motion principles.

FAQ

Does the MS-PB support external temperature probe feedback for precise solution temperature control?
No—the built-in heating system regulates only the plate surface temperature. Solution temperature must be monitored independently using a separate calibrated probe.
Can the MS-PB be used with corrosive solvents such as concentrated HCl or NaOH solutions?
Yes, provided the vessel is chemically compatible and the stir bar is PTFE-coated; however, prolonged exposure of the plastic plate surface to aggressive vapors may affect long-term surface integrity.
Is the unit suitable for continuous 24/7 operation?
It is rated for intermittent duty cycles (duty cycle ≤ 60%); extended unattended operation is not recommended due to thermal accumulation in the motor and lack of overtemperature cut-off beyond plate surface limits.
What stir bar sizes are optimal for achieving laminar flow in a 1 L beaker?
A 25 mm × 8 mm PTFE-coated stir bar typically provides optimal torque transfer and vortex control for 1 L aqueous volumes at 400–800 rpm.
Does SCILOGEX provide NIST-traceable calibration documentation for the MS-PB?
No—calibration certificates are not supplied, as the device falls outside ISO/IEC 17025 scope for metrological verification; users should perform in-house verification using certified tachometers and surface thermometers.