Zhongjiaojinyuan HX105 200W Integrated Circulating Chiller

Overview

The Zhongjiaojinyuan HX105 is an integrated, microprocessor-controlled circulating chiller engineered for precise temperature regulation in laboratory and analytical applications requiring both cooling and heating capabilities. Unlike passive water baths or external chillers requiring separate plumbing or tap-water cooling, the HX105 incorporates a hermetically sealed refrigeration compressor, PID-based digital temperature control, and an internal 5 L stainless-steel bath—enabling stable thermal management from −10 °C to 95 °C without reliance on municipal water supply. Its design follows fundamental thermodynamic principles of closed-loop heat exchange: the refrigerant cycle removes heat from the bath fluid, while the integrated circulation pump maintains laminar flow through external equipment via flexible tubing. This architecture supports continuous-duty operation under load, making it suitable for long-duration experiments where thermal drift must remain below ±0.05 °C.

Key Features

• Integrated refrigeration system with 200 W cooling capacity and electric heating element—no external coolant or tap-water connection required
• High-stability PID temperature control with optional display resolution of 0.1 °C or 0.01 °C for fine-grained process monitoring
• Vertical compact footprint (215 × 405 × 550 mm) optimized for benchtop integration in space-constrained labs
• Wide-access bath opening (140 × 150 mm) and 150 mm depth facilitate immersion of large or irregularly shaped samples and accessories
• Dual-mode operation: standalone bath mode for direct sample conditioning, or external circulation mode for coupling with rotary evaporators, electrophoresis units, viscometers, vacuum pumps, and medical thermal devices
• Comprehensive safety architecture including over-temperature cutoff, low-level fluid detection, sensor open/short circuit diagnostics, and automatic alarm logging
• Optional RS485 serial interface compliant with Modbus RTU protocol for integration into centralized lab automation systems
• Configurable auto-refill module (optional) maintains consistent bath volume during extended unattended operation

Sample Compatibility & Compliance

The HX105 accommodates a broad range of sample formats and auxiliary instrumentation. Its 5 L bath accepts standard glassware (e.g., beakers up to 1 L), probe-based sensors, and immersion coils. When used in external circulation mode, it interfaces seamlessly with common analytical hardware—including rotary evaporators (e.g., Buchi R-300), capillary viscometers (ASTM D445), horizontal and vertical electrophoresis tanks (e.g., Bio-Rad Sub-Cell GT), diffusion pumps, ion pumps, and cryogenic medical devices such as therapeutic cooling blankets. The unit complies with IEC 61010-1:2010 for electrical safety in laboratory equipment and meets CE marking requirements for EMC and low-voltage directives. While not certified for GMP or FDA 21 CFR Part 11 out-of-the-box, its RS485 interface and event-log-capable firmware support audit-trail implementation when deployed within validated environments under GLP or ISO/IEC 17025 quality systems.

Software & Data Management

The HX105 operates via an embedded 32-bit microcontroller running proprietary firmware with real-time clock and non-volatile parameter storage. All setpoints, actual temperatures, alarm events, and runtime hours are retained across power cycles. The optional RS485 interface enables bidirectional communication with host PCs or SCADA systems using ASCII command sets or Modbus registers. Users may log temperature profiles at user-defined intervals (1 s to 60 min), export CSV-formatted datasets, and trigger external relays upon threshold breaches. Firmware updates are performed via USB-to-serial adapter, ensuring long-term maintainability without hardware modification. No cloud dependency or proprietary software installation is required—basic control and monitoring can be achieved using terminal emulators or LabVIEW-compatible drivers.

Applications

• Low-temperature electrophoresis: maintaining gel matrix integrity during high-voltage runs at 4–10 °C
• Viscosity measurement: stabilizing Ubbelohde or Cannon-Fenske capillaries per ASTM D445 and ISO 3104 protocols
• Rotary evaporation: condenser cooling for efficient solvent recovery at sub-ambient temperatures
• Vacuum system thermal management: sustaining optimal operating temperature for diffusion and turbomolecular pumps
• Biomolecular assay support: temperature-controlled incubation of ELISA plates, PCR prep stations, and chromatography columns
• Medical device testing: simulating thermal loads on cryotherapy systems and patient-cooling apparatus
• Materials science: controlled crystallization studies, polymer solution rheology, and phase-change characterization

FAQ

Does the HX105 require connection to a building’s chilled water system?

No—it is fully self-contained with an integrated vapor-compression refrigeration circuit and does not rely on facility-supplied cooling water.
Can the unit maintain temperature stability during high-flow external circulation?

Yes—its 5–10 L/min flow range and 0.25 bar pressure rating ensure stable thermal delivery even when driving multiple parallel loads or long tubing runs (≤15 m total equivalent length).
Is the bath fluid reservoir accessible for cleaning or replacement?

Yes—the top cover lifts to expose the stainless-steel bath chamber; drain valve and fill port are located at the rear panel for routine maintenance.
What fluids are compatible with the HX105 circulation system?

Deionized water, 30% ethylene glycol/water mixtures, and other non-corrosive, low-viscosity heat-transfer fluids with pH 6–8 and conductivity <50 µS/cm.
How is calibration traceability established for this instrument?

The unit supports two-point calibration using NIST-traceable reference thermometers; factory calibration certificates are available upon request and include uncertainty budgets per ISO/IEC 17025 guidelines.