Coolium DX-406 Low-Temperature Circulating Chiller

Overview

The Coolium DX-406 Low-Temperature Circulating Chiller is an integrated, air-cooled refrigeration system engineered for precise thermal management in laboratory and industrial applications requiring stable sub-ambient temperature control. It employs a hermetically sealed compressor-based vapor-compression cycle to achieve reliable cooling performance across a wide operational range of −40 °C to +20 °C. Heat exchange occurs between the refrigerant loop and a thermally stabilized water–glycol mixture contained in a 6 L stainless steel reservoir. A high-efficiency centrifugal circulation pump delivers consistent flow (10 L/min) at 0.3 bar pressure, enabling uninterrupted external cooling loops for connected instrumentation. Temperature regulation is maintained via a PID-controlled digital thermostat with ±0.1 °C stability—critical for applications sensitive to thermal drift, such as spectroscopic calibration, cryogenic sample conditioning, or exothermic reaction control.

Key Features

• Full 304 stainless steel construction—including reservoir, pump housing, and fluid pathways—for corrosion resistance and long-term compatibility with aqueous and mild glycol-based heat transfer fluids.
• Integrated air-cooled condenser design eliminates dependency on facility water supply or chilled water infrastructure—ideal for standalone benchtop or mobile deployment.
• PID-driven temperature controller with real-time digital display, programmable setpoint memory, and over-temperature/low-flow safety interlocks.
• Low-noise operation (<65 dB(A) at 1 m) achieved through optimized fan speed modulation and vibration-damped compressor mounting.
• Rc 3/8″ female threaded external port (ISO 7-1) compatible with standard laboratory tubing and quick-connect fittings for secure, leak-resistant external loop integration.
• Continuous-duty rated motor and refrigeration circuit designed for 24/7 operation under nominal load conditions without duty-cycle limitations.

Sample Compatibility & Compliance

The DX-406 is compatible with a broad spectrum of analytical, medical, and industrial equipment requiring external coolant circulation—including spectrometers (ICP-OES, FTIR), mass spectrometry ion sources, NMR preamplifier chillers, laser diode mounts, vacuum diffusion pumps, and rotary evaporators. Its stainless steel wetted parts meet ASTM A240/A240M standards for 304 stainless steel and are suitable for use with 10–30% ethylene glycol/water mixtures per ISO 8502-9 guidelines. While not certified to UL 61010-1 or IEC 61000-6-3 out-of-the-box, the unit complies with CE marking requirements for electromagnetic compatibility (EMC Directive 2014/30/EU) and low-voltage safety (LVD Directive 2014/35/EU) when installed per manufacturer-specified grounding and ventilation protocols. For GLP/GMP environments, optional audit-trail-enabled firmware upgrades support 21 CFR Part 11–compliant electronic recordkeeping when paired with validated data acquisition software.

Software & Data Management

The DX-406 operates autonomously via its embedded microcontroller and does not require host PC connectivity for basic function. However, RS-485 Modbus RTU interface (standard) enables integration into centralized lab monitoring systems (e.g., LabVIEW, Ignition SCADA, or custom BMS platforms) for remote setpoint adjustment, real-time temperature logging, and alarm status polling. Optional USB-to-RS485 adapters facilitate direct connection to Windows/Linux workstations running Coolium’s free ChillerLink™ utility—providing time-stamped CSV export, trend graphing, and configurable email/SNMP alerts for out-of-spec events. All logged data retains ISO/IEC 17025-aligned traceability metadata (timestamp, operator ID, instrument serial number) when used with validated configurations.

Applications

• Analytical Instrument Cooling: Stabilization of CCD detectors in Raman spectrometers; thermal control of ESI and MALDI ion sources; condenser cooling for GC-FID and HPLC systems.
• Vacuum & Cryogenic Systems: Pre-cooling of turbo-molecular pump bearings; temperature regulation of cryo-traps and cold fingers in UHV chambers.
• Materials Processing: Temperature control during laser welding, fiber drawing, and thin-film deposition where thermal distortion must be minimized.
• Biopharmaceutical Equipment: Jacketed reactor temperature maintenance during fermentation, crystallization, or chromatography column equilibration.
• Medical Device Support: Thermal regulation of MRI RF amplifiers, X-ray tube coolants, and patient cooling blankets in therapeutic hyperthermia systems.

FAQ

What heat transfer fluids are recommended for use with the DX-406?
Deionized water is suitable for operation above 0 °C. For sub-zero applications, a 30% v/v ethylene glycol–water mixture is recommended to prevent freezing and maintain viscosity below 15 cSt at −40 °C.

Can the DX-406 be operated in a temperature-humidity controlled room only, or does it require additional ventilation?
Yes—the air-cooled condenser requires ≥500 mm unobstructed clearance above the unit and ambient airflow of ≥300 m³/h. Installation in enclosed cabinets or stacked configurations is not advised without forced-air extraction.

Is the reservoir level sensor calibrated and field-serviceable?
The capacitive liquid-level sensor is factory-calibrated and sealed; replacement requires authorized service due to IP67 ingress protection and electrical isolation requirements.

Does the unit include dry-run protection for the circulation pump?
Yes—integrated flow detection via impeller RPM monitoring triggers automatic shutdown if flow falls below 3 L/min for >15 seconds, preventing pump cavitation damage.

What is the expected service interval for compressor oil and refrigerant charge verification?
Under continuous operation at ≤80% capacity, refrigerant integrity and lubricant condition should be verified every 24 months by certified HVAC-R technicians using ASHRAE Standard 15–2022 procedures.