The XCH-SD Series newly airway system designed achieves uniform of temperature and humidity form different parts inside the chamber. The inner wall and duct plate are made of stainless steel 304. Observation window of hollow tempered glass with electrothermal film. Temperature Range: 20~ 50℃ Temperature Fluctuation：≤ ±0.5℃ Temperature Deviation：≤ ±1.0℃ Humidity Range：40～80%RH(or 20～80%RH）); Humidity Deviation：≤ ±3.0%RH Test Points Optional：40℃ /75%RH、25℃ /60%RH、30℃ /65%RH （40℃ /25%RH、25℃ /40%RH、25℃ /60%RH） Low Temperature Laboratory: 2 ～ 8℃