HUXI HMS-6SG Six-Position Heated Magnetic Stirrer

Overview

The HUXI HMS-6SG is a precision-engineered six-position heated magnetic stirrer designed for high-throughput, reproducible mixing and temperature-controlled reaction support in regulated laboratory environments. Utilizing Couette flow principles—where rotational motion of a magnetic stir bar induces laminar fluid motion within a vessel—the HMS-6SG delivers consistent shear profiles across all six independent stations. Its integrated PT100 resistance temperature detector (RTD) sensor and digital PID temperature controller enable stable thermal regulation from ambient +5 °C up to 160 °C, with ±1 °C accuracy over the full operating range. The unit’s aluminum die-cast heating plate, coated with chemically inert ceramic, achieves surface temperatures up to 320 °C while maintaining uniform thermal distribution—critical for solvent evaporation, dissolution kinetics, or catalytic synthesis where localized hot spots must be avoided. Designed for continuous duty in QC labs, academic research facilities, and GLP-compliant testing centers, the HMS-6SG meets fundamental mechanical and electrical safety requirements per IEC 61010-1 and complies with RoHS directives.

Key Features

• Six fully independent stirring positions—each with dedicated speed and temperature control, enabling parallel processing of heterogeneous sample sets without cross-interference.
• Brushless DC motor per station ensures long-term operational stability, zero carbon brush wear, low acoustic emission (≤27 dB[A]), and torque consistency across the full 50–2000 rpm range.
• Ergonomic 30° tilted front panel with tactile rotary knobs and sealed membrane switches provides intuitive, glove-compatible operation under both seated and standing lab workflows.
• Ceramic-coated aluminum heating plate (Ø135 mm) offers exceptional corrosion resistance against organic solvents, acids, and alkalis—validated for repeated exposure to HCl (1 M), NaOH (1 M), and acetone at elevated temperatures.
• LCD display simultaneously shows real-time setpoints and actual values for both speed (rpm) and temperature (°C), supporting immediate verification during method execution.
• PID auto-tuning function eliminates manual parameter optimization; reduces thermal overshoot (<2 °C) and stabilizes setpoint acquisition within <3 minutes under standard 1 L aqueous load conditions.
• Mechanically robust enclosure: cold-rolled steel chassis with heat-resistant polymer overmolding ensures structural integrity, electrical insulation (IEC Class II), and resistance to incidental chemical splashes.

Sample Compatibility & Compliance

The HMS-6SG accommodates standard laboratory glassware—including beakers (50–1000 mL), Erlenmeyer flasks (125–2000 mL), and cylindrical reaction vessels—when used with appropriately sized magnetic stir bars (supplied A- and C-series types cover common viscosity ranges from 1 to 5000 mPa·s). Its 175 mm center-to-center spacing supports simultaneous use of 1 L containers without physical interference. The instrument conforms to ISO/IEC 17025 documentation expectations for equipment qualification: built-in timer (0–9999 min) enables unattended endpoint-triggered shutdown, and non-volatile parameter storage retains last-used settings after power cycle. While not inherently 21 CFR Part 11 compliant, audit-ready usage logs can be generated externally via serial output (RS-232 optional) when integrated into validated LIMS or ELN platforms.

Software & Data Management

The HMS-6SG operates as a standalone analog-digital hybrid system with no embedded firmware-based data logging. However, its RS-232 interface (available as factory-installed option) supports ASCII command protocol for remote parameter setting, real-time status polling (speed, temp, timer), and event-triggered alerts—enabling integration with LabVIEW, Python-controlled automation scripts, or centralized monitoring dashboards. All local settings are retained in EEPROM memory. For GxP environments, users may implement procedural controls—such as pre-run calibration checks using NIST-traceable thermometers and tachometers—and document parameter verification per SOP-defined intervals.

Applications

• Pharmaceutical formulation development: buffer preparation, API solubility screening, and excipient compatibility studies requiring precise thermal and agitation control across multiple concentrations.
• Environmental analysis: digestion of soil/water samples per EPA Method 3015A, where uniform heating and mixing minimize analyte loss during acid reflux.
• Materials science: nanoparticle dispersion in polymer matrices, precursor solution homogenization for sol-gel synthesis, and rheological preconditioning of colloidal suspensions.
• Clinical & diagnostic labs: reagent batch preparation, ELISA plate coating solutions, and culture media conditioning prior to sterility filtration.
• Academic teaching labs: kinetic experiments (e.g., iodine clock reaction), Arrhenius parameter determination, and multi-variable DoE setups leveraging independent station programming.

FAQ

Can the HMS-6SG be used with corrosive solvents such as concentrated sulfuric acid?
The ceramic-coated heating surface resists short-term contact with common lab acids and bases, but prolonged exposure to >70% H₂SO₄ at >100 °C is not recommended. Always verify compatibility with material safety data sheets and conduct bench-scale validation.
Is individual station calibration traceable to national standards?
The unit does not include factory calibration certificates, but PT100 sensors and speed encoders are calibrated at production against reference standards traceable to CNAS-accredited laboratories. End-users may perform field verification using ISO/IEC 17025-accredited equipment.
Does the timer function retain elapsed time during power interruption?
No—the timer resets upon power loss. For critical timed protocols, uninterruptible power supply (UPS) integration is advised.
What maintenance is required for long-term reliability?
Annual inspection of stir bar alignment, cleaning of heating surface residue with ethanol or mild detergent, and visual check of panel seals constitute routine maintenance. No lubrication or internal servicing is required due to brushless motor architecture.
Can the HMS-6SG operate continuously for 72+ hours?
Yes—designed for uninterrupted operation under rated load (≤10 L water per position at 120 °C, 800 rpm), provided ambient conditions remain within 5–40 °C and relative humidity ≤80%. Thermal cut-off protection activates at 350 °C surface temperature.