Double walled construction, inner chamber made out of thick highly polished stainless steel sheet and outer made out of thick mild steelduly finished in stoving enamel paint. The lid is made of stainless steel. The gap between the two chambers filled with glass wool to prevent loss of heat. The temperature is achieved by superior immersion heater and is controlled by capillary type thermostat from ambient to 90oC+ 0.5oC.The shaking mechanism is fitted with variable speed motor couple to shaking tray working on rollers.