Beifen Sanpu HH-1 Digital Constant-Temperature Water Bath
| Brand | Beifen Sanpu |
|---|---|
| Model | HH-1 |
| Type | Single-Well Digital Water Bath |
| Heating Power | 300 W |
| Temperature Range | 0–100 °C |
| Temperature Accuracy | ±1.5 °C |
| Well Diameter | 125 mm |
| Well Depth | 95 mm |
| Construction | Stainless Steel Inner Tank, Powder-Coated Mild Steel Outer Casing |
| Voltage | 220 V AC, 50 Hz |
| Safety | Grounded 3-Pin Plug, Over-Temp Protection Circuit |
| Compliance | CE-marked design principles, GLP-aligned operational protocol |
Overview
The Beifen Sanpu HH-1 Digital Constant-Temperature Water Bath is a precision-engineered laboratory water bath designed for stable thermal conditioning of samples during routine analytical, preparative, and quality control procedures. Operating on the principle of resistive immersion heating with direct-contact thermal transfer via a centrally mounted stainless steel-sheathed heating element, the HH-1 maintains uniform temperature distribution across its single-well chamber through natural convection and optimized water volume dynamics. Its microprocessor-based digital temperature controller (KW-1000DC series) delivers setpoint stability within ±1.5 °C over the full 0–100 °C operating range—sufficient for applications including enzymatic incubation, solvent evaporation, reagent warming, sample equilibration prior to chromatography or spectroscopy, and controlled hydrolysis. The unit is engineered for continuous-duty operation in ISO 17025-accredited laboratories, academic teaching labs, and pharmaceutical QC environments where reproducible thermal exposure is required without active agitation.
Key Features
- Single-well configuration with 125 mm diameter × 95 mm depth stainless steel well—compatible with standard Erlenmeyer flasks (up to 1000 mL), beakers, and test tube racks
- Digital PID temperature controller with intuitive keypad interface and real-time LED display—supports ramp-and-soak programming via manual setpoint adjustment
- 300 W high-efficiency heating element embedded directly in the water reservoir—enables rapid heat-up (typical time to reach 60 °C from ambient: <12 min) and low standby power consumption
- Corrosion-resistant 304 stainless steel inner tank formed via deep-drawn stamping—eliminates weld seams that could harbor contaminants or accelerate pitting
- Electrostatically powder-coated mild steel outer housing—provides mechanical durability and resistance to incidental chemical splashes
- Integrated safety circuitry including automatic cut-off upon sensor disconnection or dry-run detection—complies with IEC 61010-1 Class II insulation requirements
- Grounded 3-pin power inlet with reinforced strain relief—ensures electrical safety per national lab wiring standards
Sample Compatibility & Compliance
The HH-1 accommodates glassware up to 125 mm in diameter and supports immersion depths suitable for volumetric flasks, jacketed reactors, and multi-vial carriers. Its open-bath geometry allows unrestricted access for pipetting, sampling, or manual stirring. The unit conforms to general-purpose laboratory equipment safety frameworks under IEC 61010-1 and incorporates design elements aligned with Good Laboratory Practice (GLP) documentation needs—including traceable temperature setpoints, operator-accessible calibration offset adjustment, and non-volatile parameter retention after power cycling. While not certified to FDA 21 CFR Part 11, its digital controller supports audit-ready manual log entries and is routinely deployed in environments maintaining GMP-compliant ancillary thermal processes.
Software & Data Management
The HH-1 operates as a standalone analog-digital hybrid instrument with no embedded firmware update capability or USB/RS-232 connectivity. Temperature data is displayed locally only; no remote monitoring or export functionality is provided. Users are advised to record setpoints, actual bath temperatures (verified with an external NIST-traceable thermometer), and duration manually in laboratory notebooks or LIMS-integrated electronic logs. For regulated workflows requiring electronic records, integration is achieved via external data loggers connected to the bath’s auxiliary PT100 output (optional accessory). Calibration verification should be performed quarterly using a reference thermometer calibrated to ISO/IEC 17025-accredited standards.
Applications
- Precise pre-warming of culture media and enzymatic reagents prior to microbiological assays
- Controlled solvent removal under gentle thermal conditions for HPLC sample preparation
- Equilibration of viscosity standards and calibration oils at defined temperatures (e.g., ASTM D445)
- Hydrolysis kinetics studies requiring sustained 37 °C or 60 °C exposure
- Accelerated stability testing of formulations in glass vials under static thermal stress
- Supporting dissolution testing apparatus (e.g., USP Apparatus I/II water jacket temperature maintenance)
- Teaching laboratory demonstrations of thermal equilibrium, heat capacity, and phase-change behavior
FAQ
What is the maximum recommended water fill level?
The water level must fully submerge the heating element and remain at least 20 mm below the well rim to prevent overflow during thermal expansion.
Can the HH-1 be used with organic solvents?
No—it is designed exclusively for aqueous solutions. Immersion of flammable or corrosive solvents may damage seals, sensors, or the stainless steel tank and voids safety certification.
Is calibration certificate included with shipment?
A factory-as-tested temperature verification report is supplied; formal ISO/IEC 17025 calibration requires third-party service and is not bundled.
Does the unit support external temperature probes?
Yes—an optional PT100 input port is available for connection to external process controllers or data loggers (ordered separately).
What maintenance is required for long-term reliability?
Monthly descaling with 5% citric acid solution is recommended in hard-water regions; annual inspection of the silicone gasket and sensor mounting integrity is advised.
