Constructed of mild steel and stainless steel, it is a type of water bath widely used for bacteriological and lab applications that require incubation as well as general tests and procedures. Since a highly efficient thermostat is used to control temperature in its enclosure, these are often called thermostat water bath. It’s a mild steel coated device with inner chamber of stainless steel. The gap between the walls is occupied with glasswool so as to avoid thermal loss. The inner chamber is covered with the unit. Temperature within the device is controlled using a capillary thermostat from 5 degree C to 90 degree C.