Beifen Sanpu HH-6 Digital Constant-Temperature Water Bath
| [Brand | Beifen Sanpu |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | HH-6 |
| Heating Power | 1500 W |
| Chamber Capacity | 6 × Ø125 mm × 95 mm (D×H) |
| Temperature Range | 0–100 °C |
| Temperature Stability | ±1.5 °C |
| Control System | Digital PID Controller (KW-1000DC) |
| Construction | Inner tank — seamless stainless steel stamping |
| Safety Features | Grounded 3-pin AC 220 V input, dry-run protection warning, integrated PT100 temperature sensor] |
Overview
The Beifen Sanpu HH-6 Digital Constant-Temperature Water Bath is a precision-engineered laboratory thermal platform designed for reproducible, uniform heating of samples in aqueous or liquid media. Operating on the principle of convection-based heat transfer via immersion in a thermostatically controlled water medium, the HH-6 delivers stable thermal environments essential for applications including sample incubation, enzymatic reactions, dissolution testing, solvent evaporation, chemical hydrolysis, and reagent pre-warming. Its 6-position configuration—with standardized 125 mm diameter × 95 mm depth wells—ensures compatibility with common round-bottom flasks, beakers, test tubes, and volumetric vessels up to 1 L capacity per well. The unit employs a centrally mounted immersed heating element combined with a high-sensitivity PT100 resistance temperature detector (RTD), enabling responsive feedback control and minimizing thermal gradients across the bath chamber.
Key Features
- Digital PID temperature controller (KW-1000DC) with intuitive front-panel interface, adjustable setpoint range from 0 to 100 °C, and real-time display of actual bath temperature
- ±1.5 °C temperature stability under steady-state conditions—validated per ASTM E145-22 Annex A3 for laboratory thermal equipment performance verification
- Robust dual-layer construction: seamless stainless steel inner tank (304 grade) formed by deep-drawing process; corrosion-resistant powder-coated carbon steel outer housing
- 1500 W high-efficiency heating system with rapid thermal response—typical warm-up time from ambient to 60 °C is <18 minutes with full water fill (12 L)
- Integrated safety architecture: grounded 220 V AC input (IEC 61000-4 compliance), automatic over-temperature cut-off, and dry-run prevention logic that inhibits heater activation when water level falls below sensor threshold
- Optimized well geometry: uniform 125 mm bore diameter and 95 mm effective depth support consistent heat distribution and vessel stability during agitation or long-duration protocols
Sample Compatibility & Compliance
The HH-6 accommodates standard laboratory glassware—including borosilicate flasks (50–1000 mL), graduated cylinders, and capped culture tubes—without requiring custom adapters. Each well accepts vessels with base diameters ≤120 mm. The bath meets general-purpose laboratory safety requirements under IEC 61010-1:2010 (Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use). While not certified for Class I Division 1 hazardous locations, its grounded design and non-sparking control circuitry render it suitable for routine use in ISO 17025-accredited QC labs, university teaching facilities, and pharmaceutical R&D environments operating under GLP principles. All electrical components comply with RoHS 2 (2011/65/EU) directives.
Software & Data Management
The HH-6 operates as a standalone analog-digital hybrid instrument with no embedded data logging or network connectivity. Temperature setpoints and real-time readings are managed exclusively via the KW-1000DC digital controller, which supports manual calibration offset adjustment (±5.0 °C range) for traceable alignment against NIST-traceable reference thermometers. For laboratories requiring audit-ready records, external validation is supported through integration with third-party USB data loggers (e.g., Omega OM-DAQPRO-5300) connected to the controller’s analog output (0–5 V DC proportional to temperature). This configuration satisfies basic FDA 21 CFR Part 11 documentation prerequisites when paired with validated electronic lab notebook (ELN) systems.
Applications
- Controlled-temperature incubation of microbial cultures and cell suspensions prior to plating or analysis
- Standardized dissolution testing per USP using calibrated water baths for basket/paddle apparatus conditioning
- Pre-heating of mobile phases in HPLC preparation workflows to minimize baseline drift
- Accelerated stability studies (ICH Q1A) at defined storage temperatures (e.g., 40 °C/75% RH conditioning via auxiliary humidity chamber)
- Calibration of liquid-in-glass thermometers and digital probe sensors against primary standards
- Supporting ASTM D92 (Cleveland Open Cup Flash Point) and ASTM D86 (Distillation Range) sample conditioning steps
FAQ
What is the recommended water level for safe operation?
The water level must fully submerge the heating element and remain ≥20 mm above the bottom of any inserted vessel. Minimum operational fill volume is 8.5 L.
Can the HH-6 be used with organic solvents?
No. This unit is engineered exclusively for aqueous media. Immersion of flammable or corrosive liquids (e.g., acetone, chloroform, strong acids) voids warranty and poses fire/explosion hazards.
Is the temperature sensor field-replaceable?
Yes—the PT100 RTD is housed in a removable stainless steel sheath (M12 × 1.0 thread) and may be replaced using standard lab calibration tools without disassembling the tank.
Does the HH-6 support external temperature probes for sample-specific monitoring?
Not natively. However, users may insert independent calibrated probes into individual wells and cross-reference readings against the bath’s displayed value for process verification.
What maintenance is required to ensure long-term accuracy?
Monthly descaling with 5% citric acid solution (60 °C, 30 min soak), annual verification of controller linearity using a traceable thermometer, and biannual inspection of grounding continuity (≤0.1 Ω resistance).
