CZGY HH-3A Triple-Well Digital Water Bath

Overview

The CZGY HH-3A Triple-Well Digital Water Bath is an entry-level, precision-engineered laboratory thermal platform designed for simultaneous yet independent temperature control across three isolated stainless steel wells. It operates on the principle of resistive immersion heating combined with digital PID-based thermostatic regulation—ideal for applications requiring stable, non-circulating thermal environments such as sample incubation, enzymatic reactions, reagent warming, solvent evaporation, and gentle heat-assisted extraction. Unlike circulating baths, the HH-3A delivers localized thermal stability without fluid agitation, minimizing cross-contamination risk between samples and eliminating the need for external pump maintenance or flow calibration. Its triple-well architecture enables parallel processing of heterogeneous samples under distinct thermal conditions—e.g., one well at 37 °C for cell culture pre-warming, another at 65 °C for DNA denaturation, and a third at 95 °C for enzyme inactivation—without hardware modification or software configuration.

Key Features

• Three physically isolated stainless steel wells (150 × 150 × 90 mm each), fully welded for corrosion resistance and long-term structural integrity
• Digital LED temperature display with intuitive single-button SET interface for rapid parameter navigation and adjustment
• Independent digital PID controllers per well—enabling simultaneous operation at different setpoints with ±0.5 °C accuracy across ambient to 100 °C range
• Robust mechanical design: cold-rolled steel outer housing with electrostatic powder coating for enhanced chemical resistance and durability in shared lab environments
• No circulation pump or impeller—reducing acoustic noise, power consumption, and failure points associated with fluid dynamics systems
• Thermal safety compliance: grounded 3-pin mains input, automatic over-temperature cutoff, and mandatory grounding requirement per IEC 61010-1 for Class I electrical equipment

Sample Compatibility & Compliance

The HH-3A accommodates standard laboratory glassware including beakers (up to 500 mL), test tubes, flasks, and sample vials placed directly into each well. Its non-circulating design ensures compatibility with low-viscosity aqueous solutions, buffer preparations, and heat-sensitive biological matrices where shear stress must be avoided. The unit meets basic electrical safety requirements per IEC 61010-1 and conforms to GB/T 2893.1–2021 (Chinese national standard for safety colors and safety signs in laboratories). While not certified for GLP/GMP-regulated environments out-of-the-box, its digital setpoint logging capability (via manual note-taking) supports traceability in ISO/IEC 17025-accredited testing labs when integrated into documented SOPs. Note: Use only deionized or distilled water; oil media require verification of flash point compatibility and are not recommended beyond 80 °C due to thermal stability limits of the housing sealant.

Software & Data Management

The HH-3A operates via embedded firmware with no external software dependency or USB/RS-232 connectivity. All temperature settings and operational states are managed locally through the front-panel keypad and dual-digit LED display. Each well’s setpoint and real-time temperature are displayed sequentially upon pressing the SET key—a design prioritizing reliability over connectivity. Though lacking automated data export or audit trail functionality, the device supports manual calibration verification using NIST-traceable reference thermometers (e.g., Fluke 1523 or equivalent), satisfying basic metrological requirements for routine QC tasks. For labs requiring electronic records, integration with external data loggers (e.g., Omega OM-DAQPRO-5300) via analog voltage output (if retrofitted) may be implemented per internal validation protocols.

Applications

• Pre-warming culture media and reagents prior to cell handling or microbiological assays
• Controlled dehydration and concentration of aqueous extracts in phytochemical analysis
• Temperature-dependent solubility studies for pharmaceutical excipients
• Enzyme activity profiling across thermal gradients (e.g., amylase, protease kinetics)
• Standardization of viscosity measurement conditions for Newtonian fluids prior to rheometer loading
• Supporting ASTM D129, ISO 3104, and USP procedures where bath immersion is specified but circulation is not mandated

FAQ

Can the HH-3A be used with oil as a heating medium?
Yes—provided the oil’s flash point exceeds the intended operating temperature by ≥30 °C and its viscosity remains compatible with passive thermal conduction. Do not exceed 80 °C with silicone oils or mineral oils unless validated for extended exposure.
Is the temperature uniformity within each well specified?
Uniformity is not formally characterized per ISO 17025, but empirical measurements indicate ≤±1.0 °C vertical gradient (top-to-bottom) and ≤±0.8 °C horizontal gradient (center-to-corner) at steady state under standard load conditions.
Does the unit support remote monitoring or network connectivity?
No—it is a standalone analog/digital hybrid instrument with no Ethernet, Wi-Fi, or Bluetooth interfaces. Remote access requires third-party hardware integration.
What maintenance is required to ensure long-term accuracy?
Annual verification with a calibrated reference thermometer is recommended. Clean stainless steel wells with mild detergent and deionized water after each use; avoid abrasive cleaners that may compromise surface passivation.
Is the HH-3A compliant with FDA 21 CFR Part 11?
No—the device lacks electronic signature capability, audit trail generation, or user access controls required for Part 11 compliance. It may be used in regulated environments only as a non-critical auxiliary device under documented procedural controls.