☆Set constant temperature of heater at atmospheric pressure;
☆Heater of measuring room: length: about 300mm, diameter: 0.018mm, temperature coefficient of resistance: 5×10^-3/℃
☆Speed of vacuum pump: 1L/min; final vacuum of vacuum pump:≤5x10^-3 torr
☆Voltage constant temperature can be set according to features of samples;
☆To control gas sample by making small adjustments in air valve;
☆Normal test pressure:1~10 torr