Principle and the role of temperature and humidity chamber, also known as constant temperature and humidity testing machine, constant temperature and humidity test chamber, temperature or humidity box, used to detect materials under a variety of environmental test equipment and thermal properties of various materials, cold resistance, dry and wet performance. Suitable for electronic, electrical, communications, instrumentation, vehicles, plastic products, metal, food, chemical, building materials, medical, aerospace and other products quality testing purposes. Standard: GB / T5170.5-2008, GB / T10586-2006, GB / T2423.1-2008 test A, GB / T2423.2-2008 test B, GB / T2423.3-2006 test Ca, GB / T2423 .4-2008 Specifications Model Volume (Unit: L) Studio Size (W * H * D) mm Dimensions (W * H * D) mm KB-TH-S-80 400 × 500 × 400 930 × 1370 × 950 KB-TH-S-150 500 × 600 × 500 1030 × 1470 × 1040 KB-TH-S-225 500 × 750 × 600 1030 × 1610 × 1140 KB-TH-S-408 600 × 850 × 800 1130 × 1710 × 1340 KB-TH-S-800 1000 × 1000 × 800 1500 × 1860 × 1370 KB-TH-S-1000 1000 × 1000 × 1000 1520 × 1860 × 1480 Temperature Range G: -20 ℃ - + 150 ℃ Z: - 40 ℃ - + 150 ℃ D: -70 ℃ - + 150 ℃ Humidity range 5-98% RH / 10-98% RH / 20-98% RH / 30-98% RH control system Control system: imported from Korea "TEMI "The LCD touch TEMI880 temperature controller, and France Schneider, Fujitsu and other electrical components constitute the electrical control system. Refrigeration and compressor cooling system: In order to ensure the chamber cooling rate and minimum temperature requirements, the chamber cooled using binary cascade refrigeration system consisting of a set of imported compressor. Fully enclosed compressor imported from France "Taikang" brand imported from Germany, semi-hermetic compressors or "Bitzer" brand compressor.