Thermocouple and standard platinum resistance what is the difference between the two temperature gauges _ instrument

Although thermocouple is widely applied in industry, but because of its temperature range makes his application by certain restrictions, thermocouple temperature measurement principle is based on the conductor or the resistance of the semiconductor characteristics of the changes with temperature changes. Its many advantages, can also remote transmission signal, high sensitivity, strong stability, compatibility and accuracy are better, but you need to power, can't instantaneous measured the change in temperature. Industrial thermocouple usually use Pt100, Pt10, Cu50, Cu100, platinum thermocouple temperature measurement range is generally 200 - below zero 800 ℃, copper thermocouple is 40 to 140 ℃ below zero. As to distinguish the type of thermocouple and thermocouple compensation wire, but it does not need and is cheaper than thermocouple. Standard platinum resistance thermometer is 13. 8033 k - 960. 78 ℃ range scale for instrument, in the detection of various standard thermometer and precise temperature measurement instrument used as the standard, in the zones can be directly used for high precision measurement. The second class standard platinum resistance thermometer WZPB - 2 for verification industrial thermocouple and precise temperature measurement. Select the stable performance standard platinum resistance thermometer is one of the laboratories in important decisions. Manufacturer for a long time for a standard platinum resistance thermometer is how to make are quite confidential and long-term reputation usually is the sign of reliability, the long-term stability and reliability of the product by using unit identity. Thermocouple is a kind of temperature sensor, it is smaller than the diameter of a prefabricated thermocouple, flexible, good vibration resistance, suitable for installation in the case of prefabricated thermocouple can't install, the company produces the thermocouple used to introduce thermocouple temperature measuring element, therefore, is accurate, sensitive, fast thermal response time, stable quality, long service life, etc. Thermocouple temperature measuring instrument is commonly used in temperature measuring element, is made up of two different components of the conductor when two ends synthesis loop, when the two junction thermocouple temperature is not at the same time, will produce thermal current in the circuit. If the work end of the thermocouple with the reference entity temperature difference, display instrument will indicate the thermocouple thermoelectric potential of the corresponding temperature value.