Abstract: 1. On the basis of our previous works, a conduction type calorimeter, is constructed which is automatized with a photo-pen recorder. It behaves well in a wider temperature range between ambient to 150℃.2. The heat constant of this calorimeter is calibrated with electric energy and the constants at 100℃ and 150℃ are reported in this paper. From these experimental results, this calorimeter is believed to be in conformity with Tian's equation.3. The sensitivity of this calorimeter is high enough for the measurement of the heat evolved by a chemical reaction. The heat of one calorie can be measured with a relative standard devivation of about 0.5% to 1%.