Hanuo HH-600 Triple-Function Constant-Temperature Water Bath

Overview

The Hanuo HH-600 Triple-Function Constant-Temperature Water Bath is a rigorously engineered laboratory thermal platform designed to deliver stable, repeatable temperature control across three distinct operational modes: precision water bath heating, constant-temperature sample incubation, and validated boiling disinfection of reusable laboratory tools and glassware. Unlike single-purpose units, the HH-600 integrates dual thermal pathways—conductive heating via submerged stainless steel sheathed elements and convective heat transfer through uniform water circulation—to maintain thermal homogeneity within ±0.3 °C across the entire tank volume at setpoints between ambient and 100 °C. Its architecture adheres to the fundamental thermodynamic requirements of ISO/IEC 17025-accredited laboratories, where traceable temperature stability directly impacts assay reproducibility in applications ranging from enzyme kinetics to media preparation and sterilization validation.

Key Features

• 304 austenitic stainless steel tank and lid—resistant to chloride-induced pitting and compatible with aqueous buffers, saline solutions, and mild disinfectants.
• Digital PID temperature controller with real-time LED display, adjustable setpoint resolution of 0.1 °C, and automatic ramp-to-setpoint functionality.
• Integrated over-temperature cutoff (105 °C mechanical limiter) and low-water level sensor to prevent heater element damage during unattended operation.
• Front-panel accessible calibration offset adjustment (±5.0 °C range), enabling field verification against NIST-traceable reference thermometers.
• Robust chassis with non-slip rubber feet, recessed power cord management, and IP20-rated electrical enclosure meeting IEC 61010-1 Clause 6.3.2 for laboratory use.

Sample Compatibility & Compliance

The HH-600 accommodates standard laboratory vessels—including Erlenmeyer flasks (up to 2 L), beakers (up to 1 L), test tube racks, and stainless steel instrument trays—within its 600 mm × 300 mm × 210 mm external footprint. The tank depth (150 mm nominal) ensures full submersion of most sterilization loads while minimizing evaporation rate (<25 mL/h at 100 °C under still-air conditions). The unit complies with EN 61000-6-3 (EMC emissions) and EN 61000-6-2 (immunity), and supports GLP/GMP documentation workflows via optional external data loggers interfaced through RS-232 or analog 0–5 V output (available on request). For boiling disinfection protocols, it meets the thermal exposure criteria specified in ISO 15883-1 for thermally assisted reprocessing of non-critical medical devices.

Software & Data Management

While the HH-600 operates as a standalone analog-digital hybrid system, its temperature controller includes a configurable analog voltage output (0–5 V = 0–100 °C) for integration with third-party data acquisition systems (e.g., LabVIEW, MATLAB, or custom SCADA platforms). Optional firmware upgrade enables time-stamped temperature logging at user-defined intervals (1–600 s), stored internally for up to 72 hours of continuous operation. All logged datasets export in CSV format via USB port, supporting audit-ready records compliant with FDA 21 CFR Part 11 when paired with validated electronic signature modules and secure network storage.

Applications

• Controlled-temperature solubilization of polymers and surfactants prior to rheological or spectroscopic analysis.
• Pre-incubation of microbial culture media (e.g., nutrient broth, LB agar) at 37 °C or 45 °C prior to pour plating.
• Boiling disinfection of forceps, scissors, and glass pipettes per WHO-recommended 10-minute exposure at ≥95 °C.
• Stabilization of enzymatic reaction mixtures during kinetic assays requiring strict thermal constancy (e.g., LDH, ALP, or amylase activity tests).
• Support of accelerated stability studies per ICH Q1A(R2) guidelines, where samples are held at elevated temperatures (40–60 °C) for defined durations.

FAQ

What is the maximum recommended water fill level for optimal thermal uniformity?
The tank should be filled to 20–180 mm depth—avoiding overflow during thermal expansion while ensuring full coverage of heater elements and sample vessels.
Can the HH-600 be used with corrosion-inhibiting additives or glycol-water mixtures?
No. Only deionized or distilled water is permitted; glycols, alcohols, or inhibitors may degrade seals, impair sensor accuracy, and void the warranty.
Is calibration certificate included with shipment?
A factory calibration report (traceable to national standards) is provided; on-site ISO/IEC 17025 calibration services are available upon request.
Does the unit support remote monitoring via Ethernet or Wi-Fi?
Not natively—but RS-232 or analog output enables connection to industrial gateways for cloud-based telemetry using Modbus RTU or custom MQTT firmware.
What maintenance schedule is recommended for long-term reliability?
Monthly descaling with 5% citric acid solution (at 60 °C, 30 min soak), quarterly inspection of gasket integrity, and annual verification of over-temperature cutoff function.