The Great Wall HX-1005 Precision Circulating Chiller/Heater

Overview

The Great Wall HX-1005 Precision Circulating Chiller/Heater is a dual-mode thermal management system engineered for laboratory-scale temperature control of external equipment and reaction vessels. It operates on a closed-loop thermodynamic principle—integrating a hermetically sealed air-cooled compressor, PID-driven digital temperature regulation, and a high-efficiency dual-impeller circulation pump—to deliver stable, uniform thermal energy transfer across internal bath media (water or silicone oil) and externally connected instrumentation. Designed for integration into analytical workflows requiring precise thermal conditioning—including electrophoresis systems, probe-based sensors, viscometers, calorimeters, and spectroscopic sample holders—the HX-1005 maintains setpoint accuracy within ±0.05 °C over its full operational range of −5 °C to 99 °C. Its stainless steel 304 bath vessel ensures chemical resistance and long-term structural integrity under repeated thermal cycling, while the dual-loop architecture supports both self-contained bath stabilization and active heat exchange with external devices via dedicated inlet/outlet ports.

Key Features

• PID-based digital temperature controller with 0.01 °C resolution and adaptive tuning for minimal overshoot and rapid equilibration
• Air-cooled, sealed refrigeration unit enabling continuous operation without external water supply or drainage infrastructure
• Dual-impeller centrifugal circulation pump with self-priming capability, delivering enhanced flow rate and head pressure for reliable external loop performance
• 304 stainless steel bath tank resistant to corrosion from aqueous and organic heat-transfer fluids
• Simultaneous internal bath temperature maintenance and external device thermal coupling via dual-port fluid interface
• Integrated safety protections including over-temperature cutoff, low-level fluid alarm, and compressor thermal overload shutdown

Sample Compatibility & Compliance

The HX-1005 accommodates standard laboratory heat-transfer media including deionized water, ethylene glycol–water mixtures, and silicone oils (viscosity ≤ 50 cSt), supporting applications requiring cryogenic cooling or near-boiling thermal delivery. Its construction complies with IEC 61010-1:2010 for electrical safety in laboratory equipment. While not certified to UL or CE for standalone regulatory submission, the unit meets baseline mechanical and thermal design criteria aligned with ISO/IEC 17025 general requirements for testing laboratories. When deployed in GxP environments—such as pharmaceutical QC labs or contract research organizations—the HX-1005 may be qualified per IQ/OQ protocols; its digital temperature log (via optional RS485 or analog output) supports traceable calibration and audit-ready documentation when integrated with validated data acquisition systems.

Software & Data Management

The HX-1005 features a built-in digital display with real-time setpoint, actual bath temperature, and status indicators (e.g., compressor active, pump running, alarm condition). Though it does not include embedded PC software or touchscreen HMI, it provides analog voltage (0–5 V or 0–10 V) and RS485 Modbus RTU outputs for third-party integration into SCADA platforms, LIMS, or custom LabVIEW-based monitoring suites. These interfaces enable remote setpoint adjustment, temperature logging at user-defined intervals, and automated alarm triggering—facilitating compliance with FDA 21 CFR Part 11 requirements when paired with appropriate electronic signature and audit trail configurations on the host system.

Applications

• Thermal conditioning of electrophoresis tanks and gel imaging systems to prevent band distortion during prolonged runs
• Temperature stabilization of optical components in spectrophotometers, interferometers, and laser alignment setups
• Cooling/heating support for rotary evaporators, distillation assemblies, and jacketed reactors in synthetic chemistry labs
• Calibration reference source for thermocouple and RTD verification against NIST-traceable standards
• Environmental simulation for material testing in polymer rheology, coating adhesion, and battery electrolyte characterization
• Support of biophysical assays requiring strict thermal control—e.g., enzyme kinetics, protein denaturation studies, and microcalorimetry sample cells

FAQ

What types of heat-transfer fluids are compatible with the HX-1005?

Deionized water, 30–50% ethylene glycol/water blends, and low-viscosity silicone oils (≤50 cSt) are recommended. Avoid halogenated solvents or highly acidic/basic solutions.
Can the HX-1005 maintain temperature stability during extended external-loop operation?

Yes—its dual-impeller pump and optimized heat exchanger design ensure consistent flow and thermal response even with line lengths up to 10 m and pressure drops ≤ 1.2 bar.
Is the unit suitable for GLP-compliant temperature validation studies?

It supports IQ/OQ execution when used with calibrated external probes and documented procedures; however, full 21 CFR Part 11 compliance requires integration with a validated data handling system.
Does the HX-1005 require regular refrigerant servicing?

No—the sealed compressor is maintenance-free under normal operating conditions; only periodic inspection of pump seals and bath cleanliness is advised.
What is the maximum ambient temperature for reliable operation?

The unit is rated for continuous use at ambient temperatures ≤ 30 °C and relative humidity ≤ 80% non-condensing.