HH-3B Digital Single-Row Water Bath by CZGY

Overview

The HH-3B Digital Single-Row Water Bath is a precision-engineered constant-temperature immersion system designed for routine thermal stabilization of samples in life science, clinical, and quality control laboratories. Operating on the principle of convective heat transfer through a thermally uniform water medium, the unit maintains stable temperature conditions across four independently controlled wells—each equipped with dedicated digital PID temperature regulation and real-time LCD feedback. Its architecture supports applications requiring reproducible thermal equilibration without direct contact heating, minimizing thermal shock and ensuring sample integrity during enzymatic reactions, cell culture incubation, reagent warming, or dissolution testing. The device complies with fundamental safety and electromagnetic compatibility requirements outlined in IEC 61010-1 for laboratory electrical equipment.

Key Features

• Four independent heating wells with individual digital PID controllers—enabling simultaneous operation at different setpoints within the ambient-to-100 °C range.
• High-visibility triple-LCD display interface: one central master panel plus two auxiliary panels for intuitive cross-well monitoring and parameter verification.
• Corrosion-resistant 304 stainless steel bath interior ensures long-term resistance to aqueous degradation and simplifies cleaning validation under GLP-compliant workflows.
• Epoxy-powder-coated cold-rolled steel housing provides mechanical robustness and thermal insulation while meeting standard lab furniture finish specifications.
• Precision temperature control with ±0.5 °C accuracy (at 37 °C and 60 °C reference points), verified per ASTM E1112 methodology for liquid bath uniformity and stability assessment.
• Programmable mechanical timer (0–999 minutes) with audible end-of-cycle alert—supporting unattended operation in batch-processing environments.
• Over-temperature cut-off protection and dry-run prevention circuitry integrated into each heating channel to mitigate risk of heater element failure or bath evaporation damage.

Sample Compatibility & Compliance

The HH-3B accommodates standard laboratory glassware including test tubes (up to 25 mm OD), centrifuge tubes, beakers, and small-volume flasks placed directly into the water-filled wells. Its open-bath design allows unrestricted access for pipetting, sampling, or probe insertion. The unit is suitable for use in ISO/IEC 17025-accredited testing laboratories where documented temperature traceability and operational consistency are required. While not certified to FDA 21 CFR Part 11 out-of-the-box, its analog timer and non-networked digital controls align with basic GMP Annex 11 data integrity expectations for low-risk thermal support equipment. Calibration certificates (NIST-traceable reference thermometer) may be generated using external standards per ISO/IEC 17025 Clause 6.5.

Software & Data Management

The HH-3B operates as a standalone hardware platform with no embedded software, cloud connectivity, or data logging capability. All operational parameters—including setpoint, actual temperature, and remaining time—are displayed locally via three independent LCD modules. For laboratories requiring electronic record retention, integration with external data acquisition systems (e.g., LabVIEW, SCADA, or custom Python-based serial polling) is feasible via optional RS-232 or 4–20 mA analog output modules (sold separately). Audit trails must be maintained manually or through connected peripheral devices compliant with ALCOA+ principles.

Applications

• Enzyme kinetics assays requiring precise thermal activation at 37 °C or 60 °C.
• Pre-warming of culture media, sera, or molecular biology reagents prior to sterile handling.
• Dissolution testing support in pharmaceutical QC labs (aligned with USP <711> auxiliary thermal conditioning).
• Controlled thawing of frozen biological specimens to minimize cryo-damage.
• Calibration of temperature-sensitive sensors and probes using stable liquid baths.
• Long-duration incubation of low-heat-demand biochemical reactions (e.g., antibody labeling, ligand binding).

FAQ

Is the HH-3B compatible with circulating water systems?
No—the HH-3B is a still-water bath without inlet/outlet ports or pump integration. Circulation requires an external recirculating chiller or a dedicated circulating water bath model.
Can the four wells operate at different temperatures simultaneously?
Yes—each well has an independent PID controller and dedicated LCD readout, allowing discrete setpoints across the full 0–100 °C range.
What is the maximum recommended fill level for each well?
Water should be filled to approximately 1 cm below the top rim (i.e., ~9 cm depth) to ensure optimal thermal uniformity and prevent overflow during sample insertion.
Does the unit include a calibration certificate?
Factory calibration is performed using NIST-traceable reference thermometers; however, a formal calibration certificate is not included by default and must be requested separately at time of order.
How often should preventive maintenance be performed?
Biannual inspection of heating elements, thermal fuses, and LCD functionality is recommended; annual descaling with 5% citric acid solution is advised in hard-water environments.