CZGY HH-YRC005 Precision Circulating Water Bath

Overview

The CZGY HH-YRC005 Precision Circulating Water Bath is an engineered thermal control system designed for laboratory applications requiring stable, uniform, and repeatable temperature environments. Based on the principle of forced internal convection, it employs a built-in circulation pump to continuously recirculate fluid within the stainless-steel bath chamber—ensuring minimal thermal gradient (<0.5 °C spatial variation across the working volume) and rapid thermal equilibration. Unlike passive water baths, this unit delivers active heat distribution ideal for applications such as solvent evaporation, sample pre-warming, enzymatic reaction incubation, dissolution testing, and calibration of temperature-sensitive probes. Its operational range—from ambient +5 °C up to 100 °C—covers standard aqueous-based protocols without requiring oil media, while its robust 304 stainless-steel inner tank resists corrosion from repeated exposure to buffers, saline solutions, and mild organic solvents.

Key Features

• 27-liter working capacity with optimized internal geometry (300 × 300 × 300 mm) for high-volume sample placement and efficient heat transfer
• High-stability PID temperature controller with 0.1 °C resolution and ±0.5 °C accuracy over full operating range
• LCD digital display with intuitive interface for real-time monitoring of setpoint, actual temperature, and timer status
• Internal circulation system with low-noise, maintenance-free centrifugal pump ensuring consistent thermal homogeneity
• Heating-only configuration with over-temperature protection circuitry compliant with IEC 61010-1 safety standards
• Double-layer insulation and cold-rolled steel exterior with epoxy powder coating for durability and thermal efficiency
• Timer function supporting 0–9999 minutes or hours in three selectable modes (continuous, countdown, interval), enabling unattended operation for extended procedures

Sample Compatibility & Compliance

The HH-YRC005 accommodates a wide range of sample containers—including glass beakers, flasks, test tubes, and immersion probes—without interference from external airflow or vibration. Its 304 stainless-steel bath chamber complies with material requirements for GLP-compliant laboratories handling pharmaceutical intermediates, clinical reagents, and environmental samples. While not certified to ISO/IEC 17025 or ASTM E2251 for metrological traceability, the unit meets general-purpose laboratory performance expectations per ISO 15195 (laboratory equipment calibration principles) and supports adherence to USP and EP 2.2.43 guidelines for temperature-controlled dissolution apparatus qualification. It is suitable for use in QC/QA labs operating under cGMP frameworks where documented thermal stability and reproducibility are required.

Software & Data Management

This model operates as a standalone analog-digital hybrid instrument with no embedded connectivity (e.g., USB, RS-232, or Ethernet). All parameter inputs and status feedback occur via front-panel LCD and tactile buttons. For laboratories requiring electronic recordkeeping, optional external data loggers (e.g., Omega OM-DAQPRO-5300 or Testo 176 T4) can be integrated using PT100-compatible probe inputs. The timer function supports audit-ready documentation when paired with lab notebook entries or LIMS-integrated SOPs. No firmware updates or software licensing apply; maintenance consists solely of periodic visual inspection, bath fluid replacement, and pump impeller cleaning per manufacturer-recommended intervals.

Applications

• Controlled-rate drying and concentration of biological extracts in rotary evaporation setups
• Pre-incubation of cell culture media, enzyme solutions, and agarose gels prior to electrophoresis
• Temperature conditioning of reference standards during analytical instrument calibration (e.g., HPLC column ovens, viscometers)
• Stability studies of pharmaceutical formulations under accelerated conditions (per ICH Q1A)
• Thermal equilibration of calorimetry cells and differential scanning calorimeter (DSC) sample holders
• Supporting ASTM D92 (flash point), D86 (distillation), and D129 (sulfur content) test methods requiring precise bath temperature control

FAQ

Does the HH-YRC005 support external temperature probe input for chamber monitoring?
No—it relies exclusively on its internal Pt100 sensor for closed-loop control and does not provide auxiliary sensor ports.
Can this unit be used with silicone oil or other heat-transfer fluids?
Yes, though prolonged operation above 80 °C with oils requires verification of pump seal compatibility; water remains the recommended medium for optimal longevity.
Is the timer function programmable for multi-stage heating profiles?
No—the timer operates in single-setpoint mode only and does not support ramp-soak sequences.
What maintenance is required to ensure long-term temperature stability?
Biannual descaling (with 5% citric acid solution), annual pump inspection, and quarterly verification of setpoint accuracy against a NIST-traceable thermometer are recommended.
Does CZGY offer validation documentation (IQ/OQ/PQ) for this model?
Standard units ship without formal validation packages; however, blank templates compliant with FDA 21 CFR Part 11 and EU Annex 11 are available upon request for customer-led qualification.