ThermoRack 401 Thermoelectric Recirculating Chillers

Cooling Capacity 315 to 420 W @+20 °C; Process Fluid Flow Rate 2 lpm @ 15 psig; 1/4” CPC Fittings with Shut-off Valves; Centrifugal Pump; Wetted Materials: Aluminium, Stainless Steel & Polymers or Cu, Stainless Steel, Brass & Polymers

The ThermoRack 401 Thermoelectric Recirculating Chiller is a compact, rack-mounted thermal control solution engineered for precision cooling in laser, optics, and industrial applications. Developed by Solid State Cooling Systems, this 4U rackmount unit delivers cooling capacities from 315 to 420 watts depending on configuration, with temperature stability of ±0.05°C even near ambient. Its solid-state thermoelectric design eliminates the need for compressors or refrigerants, resulting in quiet operation, low vibration, and long-term reliability.

With a footprint of 19 x 21 x 7 inches (48 x 53 x 18 cm) and a weight of 39 lbs (18 kg), the ThermoRack 401 integrates seamlessly into standard 19-inch electronics racks. It supports a standard operating range of 5°C to 45°C, with an optional low-temperature configuration extending down to -5°C. The system features a digital PID controller for precise heating and cooling, and offers USB or RS232 communication for remote monitoring and control. Designed for global deployment, it includes a universal power input (100–240 VAC, 50/60 Hz) and is certified to UL, CE, CAN/CSA, and RoHS standards.

Key Features

• Cooling capacity of 315 to 420 watts at 20°C depending on configuration
• ±0.05°C temperature stability and repeatability at constant load
• Thermoelectric cooling with no compressor or Freon
• Compact 4U rackmount design for easy integration
• Centrifugal pump (~2 lpm @ 15 psig) or magnetic drive gear pump (3 lpm @ 30 psig)
• 1-liter internal tank with fluid level sensor
• Wetted materials: aluminum, stainless steel, and polymers or copper, brass, and stainless steel
• Compatible with Koolance (27% propylene glycol/water) or 27–50% ethylene glycol/water mix
• Universal power input: 100–240 VAC, 50/60 Hz
• USB or RS232 interface for system integration
• Variable speed fan for quiet operation (<55 dBA at 50% load)
• Alarms for temperature, fluid level, and system faults
• Certified to UL, CE, CAN/CSA, EN 61010-1, and RoHS

Applications

• Laser cooling for diode and solid-state systems requiring stable thermal conditions
• Optical instrumentation including interferometers and spectrometers
• Analytical equipment such as chromatography and sample preparation platforms
• Industrial test benches and OEM systems requiring rack-mounted thermal management
• Life sciences and biotech applications with temperature-sensitive components

What's Next?

If your application demands compact, rack-mounted, and precise thermal control, the ThermoRack 401 Thermoelectric Recirculating Chiller offers a proven and configurable solution. With over 3,000 units deployed globally, it is trusted by engineers and researchers for its performance, reliability, and integration flexibility.

Contact our sales team today to discuss your requirements, request a quote, or explore customization options tailored to your system.