What is the difference between the thermocouple and infrared thermometer?

Measured in different ways, according to the size and the degree of precision measuring temperature on measuring instrument. Thermocouple (

热电偶) Is commonly used in temperature measuring instrument of temperature measuring element, and it is directly measured temperature, and the temperature signals into a thermoelectric emfs, through electrical instrument ( Secondary instrument) Convert the temperature of the measured medium. The appearance of all kinds of thermocouple is often due to the need to vary, but their basic structure is roughly same, usually by the hot electrode, insulation sleeve to protect the main parts such as pipe and connection box, and usually display meter, recording meter and electronic regulator.

the temperature measurement principle of infrared thermometer is the object with the ir radiation energy into electrical signals, the size of the infrared radiant energy correspond to the temperature of the object itself, according to the size into electrical signals that can determine the temperature of the object.

thermocouple is directly measured, you can think it is based on can (can be acquired from the object to be tested Hot) Quantity, how to determine the temperature;

analyte infrared measuring temperature does not directly contact, but according to the appearance of objects in different temperature ( Infrared wavelength) To determine the temperature.

because thermocouple is directly measured, is, as measured by the temperature of the sensor of the point. According to the need can be through the placement of sensors to measure temperature of different position;

infrared measuring temperature is a mass of objects, with no specific shape objects such as fire, more difficult to judge the temperature of which point to.

thermocouple measuring accuracy is higher, mature technology. Infrared thermometer repeatability is good, does not destroy the temperature field, fast response, resistance to electromagnetic interference, vacuum, electromagnetic induction heating equipment especially for;

the application of the thermocouple temperature range than the infrared small; Low temperatures higher requirements of infrared instruments.

thermocouple must be in contact with the measured material to measurement, infrared thermometer can measure temperature without contact material;

thermocouple measuring accuracy is higher, use simple, mature, good repeatability, infrared thermometer does not destroy the temperature field, fast response, resistance to electromagnetic interference, vacuum, electromagnetic induction heating equipment especially for;

high temperature measurement, thermocouple, short life, high cost, infrared work stability, long life and reliable.