Brookfield HH-4 Single-Row Digital Constant-Temperature Water Bath
| Origin | Jiangsu, China |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Product Origin | Domestic (China) |
| Model | HH-4 (Single-Row) |
| Temperature Range | Ambient to 100°C |
| Heating Power | 1000 W |
| Working Chamber Dimensions | 610 × 160 × 130 mm |
| Display | Digital LED Controller |
| Construction | Stainless Steel Inner Tank & Powder-Coated Steel Exterior |
Overview
The Brookfield HH-4 Single-Row Digital Constant-Temperature Water Bath is a precision-engineered thermal stabilization system designed for consistent, uniform heat transfer in laboratory applications requiring stable liquid-phase temperature control. Operating on the principle of convective heat exchange via immersion in a thermostatically regulated water medium, this unit maintains setpoint accuracy within ±0.5°C across its full operating range (ambient to 100°C), making it suitable for enzymatic assays, cell culture incubation, sample warming prior to analysis, and reagent equilibration. Its robust stainless steel inner tank ensures long-term corrosion resistance against aqueous solutions, while the insulated chamber minimizes thermal loss and improves energy efficiency during extended operation.
Key Features
- Digital LED controller with intuitive push-button interface for precise setpoint entry and real-time temperature monitoring
- High-reliability 1000 W heating element engineered for rapid thermal recovery after sample loading or ambient fluctuations
- Single-row configuration optimized for standard test tube racks (12–16 mm diameter) and low-profile beakers up to 500 mL capacity
- Stainless steel inner bath (610 × 160 × 130 mm) with seamless welds and rounded corners for easy cleaning and reduced microbial retention
- Over-temperature safety cutoff with automatic power disengagement to prevent dry-run damage or sample degradation
- Powder-coated carbon steel exterior housing providing mechanical durability and chemical splash resistance in shared lab environments
Sample Compatibility & Compliance
The HH-4 accommodates a wide range of common laboratory vessels including glass test tubes, polypropylene centrifuge tubes, volumetric flasks, and shallow crystallizing dishes. Its uniform temperature distribution—verified per ASTM E2776-21 (Standard Practice for Calibration of Liquid-In-Glass Thermometers)—ensures reproducible thermal conditioning across all positions in the bath chamber. The device complies with IEC 61010-1:2010 for electrical safety in laboratory equipment and meets CE marking requirements for electromagnetic compatibility (EMC Directive 2014/30/EU). While not certified for GMP or GLP environments out-of-the-box, its stable thermal performance supports adherence to USP guidelines for temperature-controlled sample preparation in pharmaceutical quality control labs.
Software & Data Management
This analog-digital hybrid instrument operates without proprietary software or PC connectivity. All operational parameters—including current temperature, setpoint, and heater status—are displayed locally via a high-contrast 4-digit LED screen. For laboratories requiring audit-ready records, optional external data loggers (e.g., Omega OM-DAQPRO-5300 series) may be integrated using the built-in PT100 sensor output port (available upon request as an accessory upgrade). The absence of embedded firmware eliminates validation overhead under FDA 21 CFR Part 11, enabling straightforward use in regulated workflows where manual logging suffices.
Applications
- Pre-incubation of biological samples prior to PCR, ELISA, or spectrophotometric analysis
- Controlled dissolution testing of solid dosage forms in pharmacopeial methods (USP )
- Calibration of thermocouples and liquid-in-glass thermometers using fixed-point reference baths
- Temperature equilibration of viscosity standards before rheological measurement
- Accelerated stability studies at elevated temperatures for polymer solution characterization
- Warming of agarose gels and electrophoresis buffers in molecular biology workflows
FAQ
What is the temperature stability specification of the HH-4 water bath?
The unit maintains ±0.5°C stability at setpoints between 30°C and 95°C under static load conditions (per internal factory calibration report). Stability degrades slightly near extremes (±1.0°C at ambient and 100°C).
Can the HH-4 be used with non-aqueous media such as silicone oil?
No. The stainless steel tank and heating system are validated only for water and aqueous salt solutions. Use of oils or organic solvents voids warranty and poses fire risk due to uncontrolled surface temperatures.
Is the temperature sensor user-replaceable?
Yes—the integrated PT100 RTD probe is field-serviceable using standard M12 connectors; replacement kits (P/N HH-RTD-KIT) are available through authorized distributors.
Does the HH-4 support external temperature probes for remote monitoring?
Not natively. However, the optional analog output module (HH-ANALOG-OPT) provides 0–5 V DC signal proportional to bath temperature, compatible with most third-party SCADA or DAQ systems.
What maintenance is required to ensure long-term accuracy?
Monthly descaling with 10% citric acid solution is recommended for hard-water regions. Annual verification against NIST-traceable reference thermometer is advised for ISO/IEC 17025-compliant labs.
