The setup consists of a Heat source controlled with the help of digital temperature controller at any preset value. A thermometer/thermocouple pocket is provided to insert the thermometer/thermocouple in it. The time constant of different thermometer/thermocouple can be calculated with the set-up. A stopwatch is also provided for measurement of time. A Heat sink is fitted to cool down the thermometer/thermocouple. All components are assembled on a base plate to form table top set-up.