Temperature and Humidity Environmental Test Chamber. Digital programmable controller. Temp. Range: -20 to +100 deg C. Humidity Range: 20 to 98 percent rh. Inside Dimensions: 19 in. L x 24 in. W x 29 in. H. 2 in. dia. cable port. Stainless construction. Date of Mfg.: 2005. 380V, 3 Ph, 50 Hz. Compressor is 50/60 Hz and system will be set up and tested at 60 Hz.