CZGY HH-6A Digital Single-Control Six-Position Magnetic Stirring Water Bath

Overview

The CZGY HH-6A Digital Single-Control Six-Position Magnetic Stirring Water Bath is an engineered laboratory platform designed for simultaneous temperature-controlled stirring of up to six independent samples in standard glassware. It operates on the principle of resistive heating combined with permanent-magnet-driven magnetic stirrer rotation—enabling precise thermal regulation and homogeneous mixing without mechanical shaft penetration. This dual-function architecture eliminates cross-contamination risks while maintaining consistent thermal uniformity across all six wells. The unit is calibrated for routine applications requiring stable liquid-phase thermal environments between ambient and 100 °C, with real-time digital feedback control ensuring reproducible experimental conditions. Its robust construction—featuring a fully welded 304 stainless steel bath tank and corrosion-resistant epoxy-coated exterior—meets long-term durability requirements in academic teaching labs, QC/QA facilities, and R&D environments where multi-sample parallel processing is essential.

Key Features

• Six independent 150 × 150 × 120 mm wells, each equipped with individual digital temperature setpoint control and adjustable magnetic stirring (0–1600 rpm)
• High-resolution dual LED display per channel: one for setpoint/actual temperature (°C), another for selected stirring speed (rpm)
• PID-based temperature controller with user-accessible tuning parameters (P, T, E) for optimized thermal response and minimal overshoot
• 300 W heating element per well, delivering rapid thermal equilibration and sustained stability at target temperatures
• Stainless steel inner tank fabricated via full seam welding—resistant to chemical exposure, thermal cycling, and repeated cleaning cycles
• Grounded 3-pin power interface compliant with IEC 61000-6-3 EMC standards; integrated overtemperature cutoff prevents dry-run damage
• Front-panel push-button interface with intuitive SET/↑/↓ navigation—no software installation or external drivers required

Sample Compatibility & Compliance

The HH-6A accommodates standard cylindrical vessels up to 120 mm in diameter and 150 mm in height—compatible with common borosilicate glass beakers (50–500 mL), reaction tubes, and digestion vials. Its open-well configuration supports passive evaporation monitoring and manual sampling without disassembly. From a regulatory standpoint, the device satisfies baseline safety requirements under GB 4793.1–2019 (Chinese equivalent of IEC 61010-1) for electrical equipment used in laboratory environments. While not certified for GMP or GLP production environments, its traceable temperature control, stable thermal gradients (<±0.8 °C across wells at 60 °C), and audit-ready parameter logging (via optional RS-232 output module) support method validation in ISO/IEC 17025-accredited testing laboratories. All materials in contact with water—tank, heater sheath, and stir bar coupling surfaces—are non-leaching and inert to aqueous buffers, saline solutions, and mild organic solvents.

Software & Data Management

The HH-6A operates as a standalone instrument with embedded firmware—no proprietary software is required for basic operation. Temperature and speed settings are retained in non-volatile memory during power cycling. For advanced integration, an optional RS-232 serial interface enables remote parameter readout (current temperature, setpoint, rpm) and limited command-based control (e.g., SET TEMP, START/STOP STIR). When connected to a host PC running terminal emulation software (e.g., PuTTY, Tera Term), users may export time-stamped logs for SOP documentation or trend analysis. Though lacking native FDA 21 CFR Part 11 compliance features (e.g., electronic signatures, role-based access), the unit’s deterministic control logic and hardware-based thermal cutoffs align with ALCOA+ data integrity principles when deployed within validated workflows governed by internal QA protocols.

Applications

• Simultaneous solvent evaporation and concentration of six parallel HPLC fractions under controlled thermal conditions
• Enzyme kinetics assays requiring uniform incubation and continuous mixing across replicate biological samples
• Standardization of dissolution media temperature in USP Apparatus I/II validation studies
• Preparation of calibration standards for spectrophotometric analysis (e.g., Bradford, BCA assays)
• Hydrolysis reaction monitoring in environmental chemistry labs—e.g., pesticide degradation in buffered aqueous systems
• Cell culture reagent warming and buffer equilibration prior to sterile filtration or pH adjustment

FAQ

What is the maximum recommended fill level per well?
Fill water to a minimum of 3 cm above the heating element and no higher than 2 cm below the top rim of the well to prevent boil-over during extended operation at >90 °C.
Can the HH-6A accommodate non-magnetic stir bars or PTFE-coated bars?
Yes—any standard 15–30 mm magnetic stir bar with sufficient magnetic moment will engage reliably; PTFE-encapsulated bars are preferred for corrosive or high-pH solutions.
Is calibration traceable to national standards?
The unit ships with factory calibration against NIST-traceable RTD references; users may perform field verification using a calibrated thermometer (e.g., ASTM E74, Class A) immersed centrally in distilled water.
Does the device support programmable ramp-soak profiles?
No—this model implements single-setpoint control only; for time-dependent thermal profiles, consider the CZGY HH-6AP variant with programmable timer and slope control.
What maintenance is required to ensure long-term accuracy?
Monthly descaling with 5% citric acid solution (at 60 °C, 30 min), followed by thorough rinsing; annual inspection of heater insulation resistance (>2 MΩ) using a megohmmeter.