Zhengzhou Great Wall HX-1005 Precision Circulating Chiller/Heater

Overview

The Zhengzhou Great Wall HX-1005 Precision Circulating Chiller/Heater is a dual-mode thermal management system engineered for laboratory-scale temperature control applications requiring high stability, rapid thermal response, and long-term operational reliability. It operates on a closed-loop liquid circulation principle, utilizing a hermetically sealed air-cooled compressor and R134a refrigerant to deliver precise cooling across a wide operating range (–5 to 99 °C), while integrated resistive heating enables seamless transition between cooling and heating modes. Its core function is to maintain uniform thermal conditions in external equipment—such as electrophoresis units, electron probe microanalyzers, viscometers, or reaction jackets—by circulating temperature-controlled fluid through external tubing interfaces. The system’s ±0.05 °C temperature stability, achieved via digital PID feedback control and high-resolution thermistor sensing, meets the stringent thermal consistency requirements of analytical method validation, kinetic studies, and calibration procedures in regulated environments.

Key Features

• High-precision PID temperature control with real-time digital LED display for both setpoint and actual bath temperature.
• Dual-impeller circulation pump with self-priming capability, delivering consistent 10 L/min flow at elevated head pressure—optimized for resistance-prone external loops including coiled jackets and capillary manifolds.
• Robust 304 stainless steel reservoir (5 L capacity) resistant to corrosion from water, glycol/water mixtures, and common organic heat-transfer fluids.
• Imported hermetic air-cooled compressor (U.S./French origin) ensures low vibration, extended service life, and compliance with international safety standards for refrigerant handling (ISO 5149, EN 378).
• Thermally optimized internal flow path design promotes laminar, uniformly dispersed circulation—minimizing localized thermal gradients and enhancing heat exchange efficiency.
• Integrated over-temperature, low-level, and dry-run protection circuits aligned with IEC 61010-1 safety requirements for laboratory electrical equipment.

Sample Compatibility & Compliance

The HX-1005 is compatible with a broad spectrum of external instrumentation requiring stable thermal input, including but not limited to: gel electrophoresis systems, differential scanning calorimeters (DSC), UV-Vis spectrophotometer Peltier cells, rotary evaporator condensers, and material testing environmental chambers. Its 304 stainless steel bath and chemically inert wetted surfaces support use with aqueous buffers, 30% ethylene glycol solutions, and other non-aggressive heat-transfer media. While not certified for GMP manufacturing environments, the unit supports GLP-compliant workflows when paired with external audit-trail-capable data loggers. Its temperature stability specification (±0.05 °C) aligns with ASTM E2877-21 (Standard Guide for Validation of Thermal Stability in Laboratory Equipment) and supports method transfer per USP and ISO/IEC 17025:2017 clause 7.2.2 (Method Validation).

Software & Data Management

The HX-1005 operates as a standalone analog/digital hybrid controller without proprietary software dependency. All operational parameters—including setpoint, real-time temperature, pump status, and fault codes—are accessible via front-panel interface. For integration into automated lab networks, the unit provides analog 0–5 V or 4–20 mA output signals (optional configuration) compatible with SCADA systems, PLCs, or third-party data acquisition platforms (e.g., LabVIEW, MATLAB Data Acquisition Toolbox). When used in regulated settings requiring electronic record integrity, users may deploy external FDA 21 CFR Part 11–compliant logging hardware to capture timestamped temperature traces, alarm events, and operator actions.

Applications

• Temperature stabilization of electrophoretic separation apparatus to prevent band distortion during high-voltage runs.
• Cooling of electron beam sources and detector housings in SEM/EDS systems to reduce thermal drift and improve signal-to-noise ratio.
• Controlled exothermic reaction management in small-scale catalytic screening reactors (≤500 mL volume).
• Calibration of platinum resistance thermometers (PRTs) and thermocouples across sub-zero to near-boiling ranges.
• Support of accelerated stability testing protocols (ICH Q1A) in pharmaceutical QC labs where thermal chamber correlation requires traceable cold/hot source reference.
• Heat sink provision for laser diode modules and optical alignment benches in photonics R&D.

FAQ

What types of heat-transfer fluids are recommended for use with the HX-1005?

Deionized water is suitable for operation between 5–80 °C. For sub-zero applications, a mixture of 30% ethylene glycol and 70% deionized water is recommended; avoid methanol-based fluids due to compatibility risks with seals and pump components.
Can the HX-1005 be integrated into a building’s BMS or central lab monitoring system?

Yes—via optional analog voltage/current output signals, enabling remote setpoint adjustment and real-time temperature telemetry when interfaced with compatible industrial controllers.
Is the unit suitable for continuous 24/7 operation in a production QC environment?

It is rated for unattended operation up to 16 hours/day under standard ambient conditions (15–30 °C); extended duty cycles require periodic inspection of compressor oil level and condenser coil cleanliness.
Does the HX-1005 include factory calibration documentation?

Each unit ships with a manufacturer’s temperature verification report (at three points: 0 °C, 25 °C, and 60 °C), traceable to NIST-certified reference standards.
What maintenance intervals are recommended for optimal performance?

Inspect and clean the air-cooled condenser every 3 months; replace the circulation filter (if installed) every 6 months; verify PID tuning parameters annually using a calibrated reference thermometer.