Hanuo HHW600-2B Triple-Function Precision Digital Water Bath

Overview

The Hanuo HHW600-2B Triple-Function Precision Digital Water Bath is an engineered laboratory thermal platform designed for stable, repeatable temperature control across three primary operational modes: standard water bath immersion, constant-temperature incubation of samples or reagents, and boiling-based sterilization of glassware and instruments. It operates on the principle of convective heat transfer through a precisely regulated water medium, delivering uniform thermal energy distribution via optimized heater placement and forced convection-free natural circulation. Its microprocessor-based PID temperature controller ensures high reproducibility in routine applications such as enzymatic assays, sample thawing, cell culture preparation, solvent evaporation, and low-temperature chemical reaction maintenance. The unit complies with general safety requirements outlined in IEC 61010-1 for laboratory electrical equipment and is constructed to support long-term operation under GLP-aligned lab environments.

Key Features

• Stainless steel interior chamber (AISI 304 grade) offering superior corrosion resistance against aqueous solutions, buffers, and mild alkaline/acidic media commonly used in life science and analytical labs.
• Powder-coated cold-rolled steel exterior providing mechanical durability, scratch resistance, and enhanced thermal insulation.
• High-brightness backlit LCD display showing real-time setpoint, actual temperature, elapsed time, and system status indicators.
• Programmable digital timer with up to 99 hours 59 minutes countdown capability; auto-shutdown upon completion enhances experimental repeatability and energy efficiency.
• Over-temperature protection circuit independently monitors chamber temperature and triggers audible/visual alarm + power cutoff if deviation exceeds preset safety threshold.
• PID-controlled heating system delivers ±0.5°C temperature fluctuation and ±1.0°C spatial uniformity across the full working volume — validated per ASTM E1112 for liquid bath performance.
• Front-accessible water level indicator and drain valve facilitate maintenance and cleaning without disassembly.

Sample Compatibility & Compliance

The HHW600-2B accommodates a wide range of sample containers including beakers (up to 1000 mL), test tubes, flasks, Petri dishes, and sterilization trays. Its open-bath configuration supports both direct immersion and rack-mounted positioning. The unit meets general conformity requirements for Class II laboratory equipment under GB/T 28974–2012 (Chinese national standard equivalent to IEC 61010-1). While not certified for medical device sterilization under ISO 17665, it satisfies routine boiling disinfection protocols referenced in CLSI M29-A4 and USP for non-critical instrument decontamination. For GMP-regulated environments, optional calibration documentation and traceable NIST-traceable thermometer verification kits are available upon request.

Software & Data Management

This model operates as a standalone analog-digital hybrid system with no embedded data logging or PC connectivity. All operational parameters—including setpoint, timer value, and current temperature—are displayed locally on the LCD interface. For laboratories requiring audit trails or electronic records, external USB data loggers (e.g., Omega OM-DAQPRO-5300 series) can be integrated using calibrated PT100 probes placed within the bath medium. The device supports periodic calibration verification per ISO/IEC 17025 guidelines when used in accredited testing facilities. Firmware updates are not applicable; hardware stability is ensured through fixed-function microcontroller architecture.

Applications

• Controlled-rate thawing of cryopreserved biological samples (e.g., cell lines, serum, enzymes).
• Temperature-dependent solubility studies and dissolution testing of pharmaceutical excipients.
• Pre-incubation of agarose gels, restriction enzyme digests, and ELISA plates prior to assay initiation.
• Moisture removal from hygroscopic reagents and gentle drying of filter papers or chromatography plates.
• Boiling sterilization of pipette tips, glass slides, inoculation loops, and reusable labware in teaching and QC labs.
• Supporting distillation setups where precise coolant temperature regulation improves condensation efficiency.

FAQ

What is the maximum recommended fill volume for the HHW600-2B chamber?

The internal chamber volume is approximately 37.8 L; however, optimal thermal uniformity and safety require maintaining water level between 30–35 L (i.e., 80–90% capacity), ensuring adequate circulation space above the heater elements.
Can this unit maintain temperatures below ambient?

No — the HHW600-2B is a heating-only system with a minimum operating temperature of ambient +10°C. Refrigerated or circulating chillers must be used for sub-ambient applications.
Is the stainless steel interior electropolished or passivated?

The chamber uses standard mill-finish AISI 304 stainless steel. Electropolishing is not included but may be specified as a custom option for enhanced cleanability in high-purity applications.
Does the timer function interrupt heating during countdown?

No — the timer operates independently of temperature control. Heating continues uninterrupted until either the timer expires (triggering shutdown) or manual deactivation occurs.
How often should calibration verification be performed?

Per ISO/IEC 17025 and internal lab SOPs, verification using a traceable reference thermometer is recommended before each critical experiment series or at least daily in high-throughput settings.