Zhengzhou Great Wall HX-1005 High-Precision Circulating Chiller

Overview

The Zhengzhou Great Wall HX-1005 High-Precision Circulating Chiller is an engineered thermal management system designed for laboratory-scale temperature control applications requiring high stability, uniform heat exchange, and long-term operational reliability. Based on a dual-mode thermodynamic architecture—integrating electric resistance heating with vapor-compression refrigeration—the unit delivers precise, programmable temperature regulation across a wide operating range of −5 °C to +99 °C. Its core function is to maintain constant bath or jacket temperatures for external equipment such as electrophoresis systems, electron microprobes, spectrophotometers, reaction calorimeters, and analytical instrumentation requiring stable thermal environments. The chiller operates via a closed-loop internal circulation path, where the 304 stainless steel reservoir serves both as thermal mass and fluid containment vessel. A PID-based digital controller continuously monitors and adjusts power delivery to the 1200 W heater and the imported hermetic air-cooled compressor (R134a refrigerant), achieving ±0.05 °C temperature stability under steady-state conditions—a performance benchmark suitable for ISO/IEC 17025-accredited testing laboratories.

Key Features

• High-stability temperature control using adaptive PID algorithm with real-time feedback from a calibrated Pt100 sensor mounted in the reservoir outlet line
• Dual-impeller circulation pump with self-priming capability ensures consistent flow delivery of up to 10 L/min at elevated head pressure, enabling reliable operation with extended external tubing loops or high-resistance accessories
• Uniform thermal distribution achieved through optimized internal baffle geometry and laminar-flow channel design, minimizing localized thermal gradients within the working fluid
• Corrosion-resistant 304 stainless steel reservoir (5 L capacity) compatible with water, water–glycol mixtures, and other non-aggressive heat transfer fluids per ASTM D1384 guidelines
• Compact footprint (250 W × 465 D × 650 H mm) with integrated casters and ergonomic handle for lab mobility and benchtop integration
• Front-panel digital LED display with intuitive menu navigation for setpoint entry, real-time temperature readout, alarm status, and system diagnostics

Sample Compatibility & Compliance

The HX-1005 is not a sample analysis device but a supporting thermal platform; therefore, it imposes no direct sample compatibility constraints. Its fluid circuit is chemically inert to standard aqueous and glycol-based coolants, making it suitable for use with chromatographic columns, rotary evaporators, and vacuum jacketed reactors. From a regulatory standpoint, the unit complies with IEC 61010-1:2010 for electrical safety in laboratory equipment and meets CE marking requirements for EMC (EN 61326-1) and low-voltage directive (2014/35/EU). While not certified to FDA 21 CFR Part 11, its digital interface supports manual logbook documentation practices aligned with GLP and GMP Annex 11 principles. All mechanical components—including the compressor, pump, and tank—are manufactured to ISO 9001-certified quality management standards.

Software & Data Management

The HX-1005 operates as a standalone instrument without embedded data logging or remote connectivity. Temperature setpoints and real-time readings are managed exclusively via the front-panel interface. For integration into automated workflows, analog output (0–10 V or 4–20 mA) and digital relay contacts (for overtemperature shutdown or pump enable/disable signaling) are available upon request as optional hardware configurations. Users intending to archive temperature history must employ external data acquisition systems interfaced via these analog outputs. No proprietary software, cloud service, or firmware update mechanism is provided—consistent with its design intent as a robust, maintenance-minimized utility device.

Applications

• Temperature stabilization of electrophoresis tanks and blotting apparatuses in molecular biology labs
• Cooling support for high-power laser sources, CCD detectors, and X-ray fluorescence analyzers
• Thermal conditioning of viscometers, rheometers, and differential scanning calorimeters during calibration or measurement cycles
• Process temperature control in small-scale synthesis reactors and distillation setups
• Reference bath provision for thermometer calibration against NIST-traceable standards
• Support for accelerated stability testing per ICH Q1A(R2) guidelines when paired with environmental chambers

FAQ

What is the minimum ambient temperature required for reliable operation at −5 °C setpoint?
Ambient temperature should not exceed 30 °C with adequate ventilation; sustained operation below 25 °C ambient is recommended for optimal compressor efficiency at sub-zero setpoints.
Can the HX-1005 be used with ethylene glycol solutions?
Yes—up to 30% v/v aqueous ethylene glycol is compatible with the 304 stainless steel tank and pump seals; higher concentrations require verification of seal material compatibility.
Is the unit suitable for continuous 24/7 operation?
Yes—designed for unattended duty cycles with thermal overload protection, automatic restart after power interruption, and compressor delay logic to prevent short-cycling.
Does the chiller include a filtration system for the circulating fluid?
No built-in particulate filter is included; users are advised to install an inline 5–10 µm filter in the external loop if operating with reclaimed or non-distilled coolant.
What safety certifications does the HX-1005 carry?
CE-marked per EN 61010-1 (safety), EN 61326-1 (EMC), and RoHS 2011/65/EU; full test reports available upon request from the manufacturer.