HUXI HMS-MT Mini Magnetic Stirrer

Overview

The HUXI HMS-MT Mini Magnetic Stirrer is a compact, benchtop laboratory device engineered for precise, low-volume mixing of low-to-moderate viscosity liquids and homogeneous solid–liquid suspensions. It operates on the principle of magnetic coupling: a rotating permanent magnet beneath the inert ABS work surface induces synchronous rotation of a PTFE- or glass-coated stir bar immersed in the sample vessel. This contactless drive mechanism eliminates mechanical seals and shaft penetration, ensuring contamination-free operation and long-term reliability without lubrication or maintenance. Designed for routine use in academic teaching labs, QC environments, and small-scale R&D workflows, the HMS-MT delivers consistent rotational performance across its full 0–2400 rpm range with minimal vibration and acoustic emission (<45 dB(A) at 1 m). Its absence of integrated heating distinguishes it as a dedicated stirring-only platform—ideal where thermal stability, external temperature control, or compatibility with heat-sensitive reagents is required.

Key Features

• Ultra-compact footprint (178 × 164 × 62 mm) and lightweight construction (0.5 kg net weight) enable flexible placement on crowded fume hoods, biosafety cabinets, or portable lab carts.
• Smooth, analog knob-based infinite speed adjustment provides intuitive, tactile control without digital interface complexity—reducing learning curve and operational error.
• Chemically resistant ABS housing and plate surface withstand incidental exposure to common solvents, dilute acids/bases, and aqueous buffers; non-porous finish prevents microbial retention and simplifies wipe-down decontamination.
• Brushed DC motor with optimized gear train ensures stable torque delivery up to 2 L volume with standard 25 mm stir bars; no speed drift observed under continuous 8-hour operation at 1800 rpm.
• Universal input voltage (100–240 V AC, 50–60 Hz) enables global deployment without transformers; energy-efficient design draws only 6 W maximum input power while delivering 3 W mechanical output.

Sample Compatibility & Compliance

The HMS-MT supports vessels ranging from 10 mL test tubes to 2 L beakers, provided internal diameter permits free rotation of 20–30 mm stir bars. It is compatible with borosilicate glass, polypropylene, and PET containers. The device conforms to IEC 61010-1:2010 for electrical safety in laboratory equipment and carries CE marking indicating compliance with EU Low Voltage and EMC directives. While not certified to ISO/IEC 17025 or GLP-specific validation protocols out-of-the-box, its stable speed repeatability (±2% full scale) and absence of software-based controls facilitate straightforward user qualification (IQ/OQ) per internal SOPs. No regulatory restrictions apply to its use in non-GMP research or educational settings.

Software & Data Management

The HMS-MT operates as a standalone analog instrument with no embedded firmware, USB connectivity, or data logging capability. This architecture eliminates cybersecurity vulnerabilities, firmware update dependencies, and software validation overhead—making it suitable for regulated environments where audit trails and electronic record integrity are managed externally (e.g., via lab notebooks or LIMS-integrated process logs). Speed settings are manually recorded by users; no timestamping, parameter history, or remote control functionality is implemented. For laboratories requiring traceable operation, integration with external timers or video documentation systems is recommended.

Applications

• Precipitation reactions and crystallization seeding in synthetic chemistry workflows.
• Buffer equilibration and reagent homogenization prior to HPLC or spectrophotometric analysis.
• Cell suspension maintenance during short-term viability assays (e.g., trypan blue exclusion).
• Preparation of calibration standards and dilution series in environmental or clinical testing labs.
• Supporting enzymatic assays where temperature must remain ambient or be externally controlled via water baths or incubators.

FAQ

Does the HMS-MT support temperature control or heating?
No. The HMS-MT is a non-heating magnetic stirrer. It lacks a heated plate or thermal sensor. For combined stirring and heating, consider HUXI’s HMS-H series models.
What stir bar sizes are recommended for optimal performance?
Stir bars between 20 mm and 30 mm in length provide best torque transfer and vortex stability within the 136 mm diameter work surface. Bars longer than 30 mm may contact vessel walls at high speeds.
Can the HMS-MT be used inside a CO₂ incubator or cold room?
Yes—provided ambient conditions remain within −5 to 40 °C and relative humidity does not exceed 80% RH. ABS housing remains dimensionally stable across this range; however, condensation on controls should be avoided.
Is the device suitable for viscous solutions like glycerol or polymer melts?
It is rated for low-to-moderate viscosity fluids only (typically <500 mPa·s at 25 °C). High-viscosity or shear-thinning media may cause stall or inconsistent rotation; verify performance empirically with representative samples.
How is calibration performed for speed accuracy?
Speed verification requires an external tachometer. HUXI provides no built-in calibration routine; users should conduct periodic checks against reference standards per internal quality procedures.