Hanuo BD-0506 High-Precision Standard Circulating Bath
| Brand | Hanuo |
|---|---|
| Origin | Shanghai, China |
| Model | BD-0506 |
| Type | Circulating Bath (Refrigerated & Heated) |
| Capacity | 6 L |
| Temperature Range | −5 to 100 °C |
| Temperature Stability | ±0.01 °C |
| Temperature Uniformity (Horizontal/Vertical) | ±0.005 to ±0.01 °C |
| Display Resolution | 0.001 °C |
| Cooling System | Hermetically Sealed Compressor |
| Safety Features | Adjustable Over-Temperature Cut-off, Dual Thermal Protection |
Overview
The Hanuo BD-0506 High-Precision Standard Circulating Bath is an engineered thermal control platform designed for laboratory and industrial applications requiring tight temperature regulation, high spatial uniformity, and long-term stability. Operating on a dual-mode refrigeration/heating principle—utilizing a hermetically sealed compressor for active cooling and a precision-resistive heating element for controlled warming—the BD-0506 maintains setpoint accuracy across its full operational range of −5 °C to 100 °C. Its core function is to serve as a stable, homogeneous thermal environment for calibration, material testing, sensor validation, and sample conditioning. The unit employs a closed-loop internal circulation system to ensure consistent heat transfer throughout the 6-liter working bath, minimizing thermal gradients and enabling reproducible experimental conditions essential for metrology-grade applications.
Key Features
- High-resolution temperature control with ±0.01 °C stability and ±0.005–±0.01 °C uniformity (horizontal and vertical), validated per ISO/IEC 17025-compliant procedures
- PT100 Class A platinum resistance thermometer integrated with digital signal processing for real-time feedback and adaptive PID tuning
- Intelligent software-assisted calibration: users may apply offset corrections to reconcile displayed vs. traceable reference probe readings
- Dual-stage thermal protection architecture—including programmable over-temperature limit and hardware-level thermal cutoff—ensures compliance with IEC 61010-1 safety requirements
- Digitally lockable control interface prevents inadvertent parameter changes during extended unattended operation
- Energy-efficient, low-vibration compressor system with over-current and over-heat safeguards, optimized for continuous 24/7 duty cycles
- Stainless steel bath chamber (304 grade) with corrosion-resistant finish, compatible with water, ethanol, glycol/water mixtures, and silicone oils up to 100 °C
Sample Compatibility & Compliance
The BD-0506 supports immersion of probes, sensors, viscometers, density meters, refractometers, and other metrological instruments requiring thermal equilibration. Its 180 × 150 mm bath opening and 150 mm depth accommodate standard calibration fixtures and multi-sensor arrays. The unit meets key international standards for laboratory equipment: design conforms to EN 61010-1 (safety), EN 61326-1 (EMC), and supports GLP/GMP workflows through auditable temperature logging (when paired with optional RS232/USB data export). While not FDA 21 CFR Part 11–certified out-of-the-box, its deterministic control logic and non-volatile parameter storage enable qualification for regulated environments under user-defined validation protocols.
Software & Data Management
The embedded firmware provides intuitive menu navigation via a high-contrast LCD display with tactile keypad. All critical parameters—including setpoint, actual bath temperature, PID coefficients, alarm thresholds, and runtime hours—are stored in non-volatile memory. Optional PC connectivity (RS232 or USB) enables time-stamped temperature logging at user-selectable intervals (1 s to 60 min), compatible with third-party data acquisition platforms (e.g., LabVIEW, MATLAB, Excel via CSV export). Firmware supports firmware updates via USB stick, ensuring long-term maintainability without hardware replacement. Audit trails—though not cryptographically signed—record all parameter modifications with timestamps, supporting ISO 17025 documentation requirements.
Applications
- Calibration of thermometers, RTDs, thermocouples, and infrared sensors against NIST-traceable references
- Thermal characterization of polymers, lubricants, and pharmaceutical excipients under controlled isothermal conditions
- Viscosity measurement support for rotational and capillary viscometers requiring precise thermal preconditioning
- Stability testing of reagents, standards, and reference materials per USP and guidelines
- Temperature-dependent electrochemical cell conditioning in battery R&D and corrosion studies
- Supporting ASTM D1550 (thermal conductivity of solids), ASTM D2196 (rheology of non-Newtonian fluids), and ISO 291 (standard atmospheres for conditioning plastics)
FAQ
What temperature media are compatible with the BD-0506?
Water, 30–50% aqueous glycol solutions, ethanol, and silicone oils (up to 100 °C viscosity grade) are suitable. Avoid halogenated solvents or highly volatile organics.
Does the BD-0506 support external temperature sensing?
No—it relies exclusively on its internal PT100 sensor. For sample-specific control, users must integrate an external controller or use the bath as a stable thermal source.
Is remote monitoring possible?
Yes—via optional RS232 or USB interface with ASCII command protocol; no proprietary software required.
Can the unit operate continuously at −5 °C?
Yes—its compressor and insulation system are rated for sustained sub-zero operation with ambient temperatures ≤30 °C and relative humidity ≤80% non-condensing.
What maintenance is required?
Annual verification of temperature uniformity/stability using a calibrated reference probe; biannual inspection of coolant levels and condenser coil cleanliness.
