Ultra Low Temperature Test Chamber Cascade Refrigeration 150L Programmable -70°C

HongCe Ultra Low Temperature Test Chamber provides a programmable test environment from -70°C to +150°C using a two-stage cascade refrigeration system. The 150L chamber is designed for cold resistance testing, low-temperature storage evaluation, and extreme cold condition simulation of electronic components, automotive parts, new energy battery materials, and scientific research samples.

The cascade refrigeration design delivers stable deep-low-temperature performance down to -70°C, meeting the requirements of IEC 60068-2-1 Test A cold testing with reliable long-term operation.

Products intended for cold regions, high-altitude environments, or winter operation must be verified at temperatures far below standard laboratory conditions. A single-stage refrigeration system struggles to maintain stable performance below approximately -40°C, which is why deep low temperature testing requires a cascade design.

The HongCe Ultra Low Temperature Test Chamber uses a two-stage cascade refrigeration circuit in which R404A and R23 work in separate loops connected by a cascade condenser. This architecture allows the chamber to reach and hold -70°C with temperature fluctuation of ±0.5°C, providing a dependable platform for ultra-low-temperature testing and material evaluation.

• Cascade Refrigeration System: Two-stage R404A + R23 cascade circuit for stable -70°C deep low temperature performance.
• Wide Temperature Range: -70°C to +150°C covering extreme cold and dry heat testing in one unit.
• Programmable Control: 7-inch color touch screen PLC with multi-step test profiles, timing control and real-time curve display.
• Reliable Cold Performance: Imported compressors, cascade heat exchanger, and hot-gas bypass defrost for continuous low-temperature operation.
• Compact Benchtop Design: 150L volume with casters and leveling feet for flexible laboratory placement.
• Complete Safety Protection: Over-temperature, compressor overload, refrigerant high/low pressure, and power phase sequence protection.

• IEC 60068-2-1:2025 - Test A: Cold (low temperature testing)
• IEC 60068-2-2:2025 - Test B: Dry heat
• GB/T 2423.1 - Environmental testing: Test A: Cold
• MIL-STD-810H Method 502 - Low temperature

• Cascade Refrigeration: Two independent refrigerant loops connected by a cascade heat exchanger extend the achievable low temperature limit to -70°C.
• Hot-Gas Bypass Defrost: Prevents evaporator frost accumulation during long low-temperature soak periods.
• Deep Cold Stability: Precision expansion valve and oil separator maintain consistent cooling capacity and compressor lubrication at low evaporation temperatures.
• Programmable Cold Testing: Multi-step profiles support cold soak, ramp, and cycle testing per IEC 60068-2-1 Test A.

Single-stage refrigeration systems lose efficiency and stability below about -40°C. A two-stage cascade system uses a second low-temperature loop (R23) to reach and hold -70°C reliably.

Automotive electronics, aerospace components, lithium battery materials, rubber and plastic parts, sensors, and cold-region consumer products.

This model is a dry low-temperature chamber. For combined temperature and humidity testing, please refer to the HongCe temperature humidity chamber series.

Guangzhou HongCe Equipment Co., Ltd. has been engaged in the development and manufacture of testing equipment and production-line testing systems since 2003, covering environmental testing, vacuum technology, automatic control and customized laboratory solutions. HongCe equipment is developed with reference to GB, IEC, EN, UL, VDE, BS, AS and ISO requirements.