Specifications: -temperature range:-70ºc~+180ºc -temp constancy: within ±0.5ºc -temp tolerance: ?¤±2.0°c Heating time:20ºc??+150ºc ?¤60 min Cooling time: 20ºc??-70ºc ?¤90 min (no load, average1ºc/min) Humidity range: 30%~95% rh Humidity deviation:±3.0%rh(rh>75%rh) ±5.0%rh(rh?¤75%rh) (remark: above data measured based on ambient temperature is +25ºc, rh is 85%rh, without specimen, constant temperature at 2 hours.)