CZGY HH Series Castor-Mounted Circulating Digital Constant-Temperature Water Bath

Overview

The CZGY HH Series Castor-Mounted Circulating Digital Constant-Temperature Water Bath is an engineered thermal platform designed for precise, stable, and reproducible temperature control in laboratory environments. Operating on the principle of forced convection via an integrated internal circulation pump, this water bath maintains uniform thermal distribution throughout the working chamber—critical for applications requiring minimal spatial temperature gradients. Unlike static water baths, its recirculation system ensures rapid thermal equilibration and high repeatability across repeated experimental runs. The unit is optimized for continuous operation in academic research labs, quality control laboratories, pharmaceutical development facilities, and industrial R&D settings where consistent thermal conditioning of samples—such as enzymatic reactions, solubility testing, cell culture incubation support, or solvent evaporation—is essential.

Key Features

• Stainless steel inner tank (304 grade) fabricated by full TIG welding—resistant to corrosion from aqueous reagents, mild acids, and alkaline solutions; seamless construction prevents leakage and facilitates cleaning.
• Robust cold-rolled steel outer housing with electrostatic powder coating—enhances mechanical durability and long-term resistance to abrasion and chemical splashes.
• Digital LED display with segmented LCD interface—provides real-time monitoring of setpoint, actual bath temperature, and timer status.
• Fuzzy PID temperature controller—delivers adaptive thermal regulation with minimized overshoot and stabilized dwell time, achieving ±0.5 °C accuracy over the operational range (typically ambient +5 °C to 100 °C).
• Integrated 200 W magnetic-drive circulation pump—ensures quiet, maintenance-free operation with no shaft seals to degrade; flow rate optimized for homogeneous heat transfer without inducing excessive turbulence.
• Four swivel castors with locking brakes—enables safe, ergonomic relocation between workstations, fume hoods, or storage cabinets while maintaining stability during active use.
• Programmable digital timer (0–9999 minutes)—supports unattended operation for extended protocols including overnight hydrolysis, controlled cooling ramping, or timed extraction cycles.

Sample Compatibility & Compliance

The HH Series accommodates standard laboratory glassware—including beakers (up to 2 L), Erlenmeyer flasks, test tube racks, and immersion probes—within its 800 × 450 × 350 mm tank volume. Its design conforms to general safety requirements outlined in IEC 61010-1:2010 for electrical equipment used in laboratory environments. While not certified for explosion-proof or sterile processing use, the unit meets baseline GLP documentation expectations when paired with validated calibration logs and routine preventive maintenance records. It supports traceable temperature verification per ISO/IEC 17025 guidelines when operated with NIST-traceable reference thermometers.

Software & Data Management

This model operates as a standalone analog-digital hybrid instrument without embedded data logging or network connectivity. Temperature and timer parameters are configured locally via front-panel membrane keys. For regulated environments requiring audit trails (e.g., FDA 21 CFR Part 11 compliance), external validation-grade data loggers—such as those compliant with ASTM E2877-22 for thermal mapping—can be deployed alongside the unit. Users are advised to maintain manual calibration logs documenting probe verification frequency, drift assessment, and corrective actions—practices aligned with ISO 9001 and GMP Annex 15 requirements for equipment qualification.

Applications

• Controlled-rate heating of reaction mixtures prior to GC or HPLC injection.
• Temperature-dependent solubility profiling of APIs and excipients in early-phase formulation studies.
• Enzyme kinetic assays requiring strict thermal consistency across multi-well plate formats.
• Pre-incubation of microbiological media and agarose gels in molecular biology workflows.
• Accelerated stability testing under isothermal conditions per ICH Q1A(R3) guidance.
• Support of distillation assemblies, rotary evaporators, and cold-finger condensers through auxiliary thermal coupling.

FAQ

What is the maximum operating temperature of the HH Series water bath?
The unit is rated for continuous operation up to 100 °C at atmospheric pressure, with thermal cut-off protection activated at 105 °C.
Can external temperature probes be connected for independent monitoring?
Yes—the bath includes a dedicated PT100 sensor port compatible with third-party calibrated probes for parallel validation.
Is deionized water required for operation?
While tap water may be used initially, prolonged operation with hard water necessitates periodic descaling; deionized or distilled water is recommended for extended service life and consistent thermal response.
How often should the circulation pump be serviced?
The brushless magnetic-drive pump requires no scheduled maintenance; however, visual inspection of impeller integrity and flow continuity is advised every 6 months in high-usage environments.
Does the unit support RS232 or USB communication?
No—this is a manually operated analog-digital instrument without serial or digital interface capabilities.