T thermocouple temperature range is how much? Why is cold and hot shock commonly used thermocouple temperature sensor?

T thermocouple is also called copper - Constantan thermocouple, t thermocouple temperature sensor can set temperature range for the largest - 200 ℃ ~ 400 ℃, some instrument are - 200℃～350℃。 Cold and hot shock box adopts T thermocouple temperature sensor for three reasons: 1, T thermocouple temperature range is moderate. Cold and hot shock tests of box need to most concentrated in - 200 ℃ ~ 400 ℃ range, in accordance with the T thermocouple temperature range available. Is a moderate temperature range, suitable for precision, the price also relatively cheap thermocouple. 2, the contact surface is small, with moderate accuracy. Thermal resistance temperature range for - available 200 ℃ ~ 600 ℃, the range is close, accuracy higher than thermocouple, but did not use it in cold and hot shock box for temperature sensor. Reason is the thermal resistance thermal contact area is large, thermocouple temperature at just one point, thus T thermocouple reaction speed is faster, cold and hot shock box impact test, temperature change too fast, so T thermocouple temperature sensor suitable for cold and hot shock box temperature sensor. 3, hot and cold shock box dedicated controller only receive T thermocouple signal. Hot and cold impact test box usually must use specially designed for the temperature controller to control. Hot and cold impact machine dedicated controller design to determine the instrument can only meet T thermocouple, so only to select T thermocouple during installation.