The constant temperature and humidity testing machine, also known as the environmental testing machine, tests the heat resistance, cold resistance, dryness resistance, and moisture resistance of various materials. Suitable for quality testing of electronics, electrical appliances, communications, instruments, vehicles, plastic products, metals, food, chemicals, building materials, medical, aerospace and other products.

GB11158 High Temperature Test Chamber Technical Conditions
GB10589-89 Low Temperature Test Chamber technical conditions
GB10592-89 High-low Temperature Test Chamber technical conditions
GB/T10586-89 Technical conditions for heat and Humidity Test Chamber
GB/T2423.1-2001 Low Temperature Test Chamber experimental method
GB /T2423.2-2001 High Temperature Test Chamber experimental method
GB /T2423.3-93 Humidity and heat Test Chamber test method
GB /T2423.4-93 Alternating damp heat test method
GB/T2423.22-2001 Temperature change test method
IEC60068-2-1.1990 Low Temperature Test Chamber test method
IEC60068-2-2.1974 High Temperature Test Chamber test method
GJB150.3 High temperature test
GJB150.4 Low temperature test
GJB150.9 Damp heat test
| model | ASR-80L | ASR-150L | ASR-225L |
| Internal dimensions (cm) | 40x50x40 | 50x60x50 | 50x75x60 |
| External dimensions (cm) | 90x136x94 | 100x146x104 | 100x161x117 |
| temperature range | -70℃~100℃(150℃)(A:-20℃ B:-40℃ C:-60℃ D:-70℃) | ||
| Temperature and humidity analysis accuracy | ±0.1℃; ±0.1%RH/1.0℃; ±3.0%RH | ||
| Heating/cooling time | Average 4℃/minute; average 1℃/minute | ||
| Insulation material | High temperature resistant and high density ethyl chloroformate foam insulation material | ||
| protective device | Fuseless switch, compressor overload protection switch, refrigerant high-low pressure protection switch, overhumidity and overtemperature protection switch, fuse, fault warning system | ||
| Accessories | Printer, viewing window, 50mm test hole, PL box light, partition | ||
| compressor | French "Taikang" brand | ||