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High-Low Temperature Test Chamber

High-Low Temperature Test Chamber



With high precision perfect external design, external with double sides cold rolled plate electrostatic powder coated material, internal with SUS#304 high temperature resistant stainless steel.

Insulation material adopt fire retardant high strength PU polyurethane foaming thermal insulating material. 

More than 20% energy saving is achieved & thanks to the introducing of Japan & German advanced refrigerator control technology. 

Control system and control circuit components are introduced with famous brand .


External test chamber uses high-temperature dual electrostatic resin paint galvanized steel; the internal test chamber uses SUS#304 high-low temperature resistance stainless steel; the insulation material uses fire-retardant high strength PU polyurethane foam material. Single door as well as vacuum glass observation window are designed with, which door frame made of heat resistance, anti-frosting, anti-condensing devices to make test technician have a good viewing of testing process inside of test chamber.

Cable Port with its ¢50mm is designed on left of testing chamber, and processed with silicon filling and sealing as well as designed with stainless steel cover for safety purpose. 

Walk-in environmental test, to guarantee safety testing operation, is designed with Explosion-proof pressure releasing function with 1 ventilation hole on left or right side of test chamber for pressure releasing purpose. 

Sealing process for test chamber is introduced with silicone sealing strip to provide an excellent sealing performance. While push-in testing holder with good loading bear is made for internal environmental test.

A close-type mechanical pressure balance & regulation device is introduced to balance difference between inside and outside of test chamber to protect testing chamber.  

2 arrays of explosion-proof and energy-save lamp is installed inside of test chamber for observation. 

Air Supply System with constant air flow as well as uniform air distribution is driven by branded asynchronous motor, multi-blades centrifugal circulating blower as well as high-performance sensors. 

Refrigeration System is introduced with French Tecumseh compressor for dehumification while Germany Bitzer compressor for refrigeration system, while use environmental friendly refrigerant HFC R404A, R23A. 

Heating System is designed with SSR (Solid-State Relay) & controller to provide high accurate non-contact switch control, and the heating tube introduced with Naked Wire Nickel Chromium Alloy Electric Heating Tube. 

Control Method for walk-in Test Chamber is introduced with Programmable high accuracy micro computer controller, use cold mirror dew point instrument control temp. humidity system. cold mirror dew point instrument control temp. Humidity system.

P.I.D. , BTC balance temperature control method(thermal compensation function)+DDC digital cold control +DEC digital electric control (Temperature change test program setting) 


Model LTT-80LTT-150LTT-225LTT-408LTT-800LTT-1000
Internal Dimension (W×H×D)mm400×500×400500×600×500500×750×600600×850×8001000×1000×8001000×1000×1000
External Dimension (W×H×D)mm650×1650×1270700×1700×1370700×1750×1420800×1800×16201200×1900×16201200×1900×1820
Temp. Range: Low Temperature: A: 25℃;B: 0;C: -20; D: -40 E:-70     High Temperature: 150 200 Optional)
Analytic Accuracy 0.1
Uniformity ±2.0;
Control Accuracy ±0.5;
Temperature Rising/Falling
Speed Rate
Temp. Rising Approx 1.0~3.0 /min; Temp. Cooling Rate 0.5~1/min.
Machine Material Inner with SUS #304 Stainless steel , External with SUS#304 Stainless steel or Cold-rolled powerder coated material .Insulation material with Polyurethane material . 
Cooling SystemAir cooling or Water cooling /Single segment compressor 
Compressor Fren ch Tecumseh ; German Bitzer ; Japan Mitsubishi 
Protection Devices Fuse-free switch, overloading protection switch  for compressor, high and low voltage coolant protection switch, over-humidity and over-temperature protection switch, fuses, fault warning system, water short storage warning protection
Optional Accessories Inner door with operation hole , Recorder, Water Purifier, Dehumidifier
Power Source AC220V , 1ph 3 lines, 50/60HZ ,  AC380V   3ph  5 lines , 50/60HZ

Approx.Weight 160200260350420460


IEC  60068-2-14Environmental testing -- Part 2-14: Tests -- Test N: Change of temperature
GB/T  2423.1-2001 IEC60068-2-1Environmental testing - Part 2: Test methods - Tests A: Cold
GB/T  2423.2-2001 IEC60068-2-2Environmental testing - Part 2: Test methods - Tests B: Dry heat
GB/T 2423.22-2002Basic environmental testing procedures for electric and electronic products--Test N: Change of temperature
GB/T5170.2-2008Inspection methods for environmental testing equipments for electric and electronic products-Temperature testing equipments