Cabinet constructed from non, Corrodible high temperature resistant glass reinforced plastic. Acrylic cover is provided. Constructed in fiber, Reinforced plastic, 10 mm thick with stiffners situated at the lowest point to take heavy load. The fog chamber conforms to astm b 117 specification. The volume is of sufficient size to test adequately the desired number of parts without overcrowding. The apparatus is made up a supply of moisture, Of a fog chamber, A salt solution reservoir free compressed air, Specimen supports, Atomizing nozzles, Provision for heating humidifying chamber, The chamber and control system. The fog chamber features a provision of smart temperature provision to, Pressure gauge, Management system manage the mist, Humidity indicator and solenoid valve to regulate these conditions. Capacity 100, 200, 400 and 600 litres. Power supply 230 v, 1 phase, 50 hz.