Description Overview Internal dimensions: 400 x 500 x 500 mm External dimensions: 900 x 1070 x 1400 mm Internal chamber material: SUS #304 stainless steel, mirror finished External chamber material: stainless steel with spray paint Insulation material: 50 mm high density rigid polyurethane foam Observation window: tempered glass Testing hole: diameter 50 mm, for cable routing Sample tray: SUS #304 stainless steel (2) Specifications Temperature range: -40 to 150 °C Temperature accuracy: ±1 °C Humidity range: 20 to 98% r.h. Humidity accuracy: ±3% r.h. Cooling speed: 1 °C per minute on average (without loading) Heating speed: 3 °C per minute on average (without loading) Cooling method: air cooling Controls: LCD touch screen, programmable temperature control Heater: explosion-proof type SUS #304 stainless steel fins radiator type heater Compressor: France Tecumseh compressor Lighting: heat resistance Temperature sensor: PT-100 dry and wet bulb sensor Safety Safety protection device: protects against leakage, high-temps, compressor shortage / overload, heater shortage, and water shortage