HH-4Q Single-Control Four-Well Water Bath
| Brand | CZGY |
|---|---|
| Origin | Jiangsu, China |
| Manufacturer Type | Direct Manufacturer |
| Model | HH-4Q |
| Power Supply | 220 V AC, 50 Hz |
| Chamber Dimensions (per well) | Ø16 cm × 10 cm depth (4 wells) |
| Heating Power | 300 W × 4 independent heating zones |
| Temperature Range | Ambient to 100 °C |
| Temperature Control Accuracy | ±0.5 °C |
| Timer Range | 0–999 minutes |
| Construction | Stainless steel inner tank, cold-rolled steel outer shell with epoxy powder coating |
| Display | Three independent LCD panels for real-time monitoring |
Overview
The HH-4Q Single-Control Four-Well Water Bath is a precision-engineered constant-temperature immersion system designed for simultaneous thermal equilibration of up to four independent sample vessels under identical setpoint conditions. Unlike multi-zone programmable baths, the HH-4Q employs a single centralized PID temperature controller that regulates all four wells in unison—ensuring uniform thermal distribution while minimizing inter-well drift. Its operation relies on resistive heating elements embedded beneath each stainless steel well, coupled with a high-efficiency water circulation path optimized for rapid heat transfer and minimal thermal lag. This architecture makes it especially suitable for applications requiring batch consistency across parallel assays—such as enzyme incubation, serological testing, dissolution pre-conditioning, and standard curve preparation in clinical and pharmaceutical QC labs.
Key Features
- Four independent 16 cm diameter × 10 cm deep wells constructed from seamless 304 stainless steel—resistant to corrosion, easy to clean, and compliant with ISO 15190:2020 laboratory safety requirements for wet bench equipment.
- Three dedicated LCD displays: one master control panel showing setpoint/actual temperature and timer status; two auxiliary panels providing redundant readouts for operational verification—supporting GLP-compliant record-keeping when paired with external logging systems.
- Individual 300 W heating circuits per well, delivering rapid thermal recovery (<8 min from 25 °C to 95 °C at full load) without cross-contamination risk from shared heating elements.
- Precision ±0.5 °C temperature stability across the full 20–100 °C operating range (verified per ASTM E1112-21 Annex A2 calibration protocol), maintained via dual-sensor feedback (PT100 reference + thermistor working sensor).
- 0–999 minute digital timer with audible end-of-cycle alert and auto-shutdown—configurable for unattended overnight operation in accordance with ICH Q5C stability testing guidelines.
- Epoxy-coated cold-rolled steel chassis provides mechanical rigidity and electrical insulation, meeting EN 61010-1:2010 safety standards for laboratory electrical equipment.
Sample Compatibility & Compliance
The HH-4Q accommodates standard laboratory glassware including 16 mm test tubes, 15 mL conical centrifuge tubes, and small-volume beakers (up to 250 mL per well). Its open-well design allows direct insertion of probes, stir bars, or temperature sensors for in-situ monitoring. The unit is CE-marked and conforms to RoHS Directive 2011/65/EU. While not certified for use in explosion-proof environments, its non-sparking heater design and grounded chassis meet general-purpose biosafety level 1 (BSL-1) facility requirements. Documentation includes factory calibration certificate traceable to NIM (National Institute of Metrology, China), supporting internal audit readiness under ISO/IEC 17025:2017 Clause 6.4.10.
Software & Data Management
The HH-4Q operates as a standalone analog-digital hybrid instrument with no built-in data export or USB connectivity. However, its three LCD outputs are compatible with third-party analog-to-digital loggers (e.g., Omega OM-DAQPRO-5300) via 0–5 V DC analog output ports (optional add-on). When integrated into validated workflows, the device supports 21 CFR Part 11 compliance through external electronic lab notebook (ELN) systems that capture timestamped screen images or relay-triggered event logs. All parameter settings—including temperature setpoint, timer value, and power-on state—are retained after power interruption, satisfying basic ALCOA+ data integrity principles for non-critical thermal conditioning steps.
Applications
- Pre-incubation of PCR reagents and restriction enzyme buffers prior to molecular biology workflows.
- Controlled thawing of cryopreserved cell lines and serum batches in biobanking operations.
- Standardized temperature conditioning of viscosity reference oils during rotational rheometer calibration.
- Simultaneous equilibration of quadruplicate samples in ELISA plate washing protocols.
- Stability assessment of liquid dosage forms per USP environmental conditioning requirements.
- Heat activation of agarose gels and electrophoresis running buffers in teaching laboratories.
FAQ
Is the HH-4Q suitable for use with organic solvents?
No. The bath is designed exclusively for aqueous media. Use of flammable or corrosive solvents may damage the stainless steel interior or compromise sensor accuracy.
Can individual wells be operated at different temperatures?
No. The HH-4Q features single-point control only. For independent multi-zone temperature management, consider the HH-4S dual-control variant.
What maintenance is required to ensure long-term accuracy?
Annual verification using a NIST-traceable thermometer (e.g., Fluke 1523) is recommended. Clean the water reservoir weekly with deionized water and inspect heater surfaces for scale accumulation.
Does the unit include over-temperature protection?
Yes. A redundant bimetallic thermal cutoff switch disables power if internal temperature exceeds 110 °C, complying with IEC 60335-1 Annex BB requirements.
Is technical support available outside mainland China?
CZGY provides English-language documentation and remote troubleshooting assistance via email. Local service partners are available in Southeast Asia and the Middle East upon request.
