CZGY HH-S8 Digital Display Constant Temperature Water Bath

Overview

The CZGY HH-S8 Digital Display Constant Temperature Water Bath is a precision-engineered, non-circulating thermal platform designed for stable, uniform heating of multiple samples simultaneously in research, quality control, and educational laboratories. Operating on the principle of direct conductive heat transfer via immersion in temperature-controlled water, the HH-S8 maintains consistent thermal conditions across all eight wells without forced convection—making it ideal for applications where gentle, non-turbulent heating is required. Its stainless steel inner tank ensures chemical resistance and long-term durability against repeated exposure to aqueous solutions, while the powder-coated cold-rolled steel exterior provides mechanical robustness and corrosion protection under routine lab handling. The unit is calibrated to maintain setpoint stability within ±0.5 °C across its full operating range (ambient to 100 °C), supporting reproducible experimental outcomes in protocols involving enzymatic reactions, sample incubation, dissolution testing, and preparative chemistry.

Key Features

• Dual-row 8-well configuration (640 × 310 × 120 mm tank volume) optimized for parallel processing of standard glassware including test tubes, flasks, and beakers
• Digital PID temperature controller with intuitive push-button interface (SET, ↑, ↓ keys) enabling precise setpoint adjustment and real-time display
• Stainless steel welded inner chamber resistant to oxidation, acid/base exposure, and thermal cycling fatigue
• Non-circulating design eliminates mechanical agitation—critical for sedimentation-sensitive or low-viscosity samples
• 1800 W high-efficiency heating element with overtemperature cutoff and grounded chassis for electrical safety compliance
• Front-panel LED display with clear digit visibility; no analog dials or parallax error
• Modular thermal insulation minimizes ambient heat loss and improves energy efficiency during extended operation

Sample Compatibility & Compliance

The HH-S8 accommodates standard laboratory vessels up to 120 mm in height and ≤100 mm in diameter per well. Its open-bath geometry allows unrestricted access for pipetting, sampling, and visual monitoring. While not certified to ISO/IEC 17025 or ASTM E2234 for metrological traceability, the device is engineered to support workflows aligned with Good Laboratory Practice (GLP) and basic GMP requirements—including documented temperature verification, user-accessible calibration offset adjustment, and audit-ready operational logs when integrated with external data loggers. It meets national electrical safety standards for Class I laboratory equipment (GB 4793.1–2019 equivalent) and requires proper grounding per IEC 61010-1.

Software & Data Management

The HH-S8 operates as a standalone analog-digital hybrid instrument with no embedded firmware-based data logging or USB/Ethernet connectivity. Temperature setpoints and real-time readings are displayed locally only. For regulatory-compliant environments requiring electronic records, integration with third-party validated data acquisition systems (e.g., LabVIEW-compatible thermocouple modules or wireless PT100 loggers) is recommended. All control parameters—including proportional band (P), cycle time (T), and hysteresis offset (E)—are accessible via the front-panel interface and may be tuned to match specific thermal load profiles. Default PID values (P = default, T = 20–60 s, I = 180 s, D = 45 s) comply with typical heating dynamics of water baths under variable vessel loading.

Applications

• Enzyme activity assays requiring stable sub-boiling temperatures (e.g., 37 °C, 60 °C)
• Chemical hydrolysis, esterification, and reflux preparation under controlled thermal conditions
• Cell culture media warming and reagent equilibration prior to use
• Dissolution testing of pharmaceutical dosage forms per USP
• Standardization of viscosity reference fluids before rotational rheometry
• Pre-heating of solvents and extraction matrices in analytical sample preparation workflows
• Calibration of liquid-in-glass thermometers and digital probes using fixed-point water baths

FAQ

What is the maximum recommended water level for safe operation?
The water level must fully submerge the heating element but remain at least 20 mm below the top rim to prevent overflow during boiling. Never operate with dry or partially exposed heaters.
Can this bath be used with oil or other heat-transfer fluids?
Yes—the HH-S8 is rated for both water and oil media; however, maximum operating temperature must not exceed the flash point of the selected fluid, and thermal stability of the stainless steel chamber remains optimal below 150 °C.
Is the temperature controller compliant with FDA 21 CFR Part 11?
No—the device lacks electronic signature capability, audit trail generation, or user-level access control; it is intended for non-GxP primary use but may serve as ancillary equipment in validated processes when paired with external compliant data systems.
How often should temperature calibration be performed?
Annual verification against a NIST-traceable reference thermometer is recommended for GLP labs; more frequent checks are advised after mechanical shock, prolonged continuous use, or observed drift exceeding ±0.3 °C.
Does the HH-S8 support external temperature probe input for chamber feedback?
No—it relies solely on internal sensor feedback; external probe integration requires aftermarket controllers or data loggers with relay output compatibility.