Thermocouple temperature measuring effective place is where _ instrument

Thermocouple temperature measurement is mainly use node temperature measurement, is the place where two thermocouple wire combination to measuring temperature. Thermocouple is when the thermocouple wire under the environment of temperature measurement may be limited by corrosion, and use other material to protect the silk, the thermocouple is called thermocouple as a whole. Thermocouple measuring temperature is the basic principle of thermoelectric effect, will be connected to the metal conductor fore and aft of the two different ingredients into a closed loop, such as the temperature of the two contact, can produce thermoelectric emf in the loop, form the thermal current, this is called the thermoelectric effect. Thermocouple is one end will be two different kinds of metal material welding, welding, called at the end of the measuring end not welding is called a reference at the end of the end, the reference side when use constant in a certain temperature (usually Such as 00 c) When to measure the heating, thermoelectric potential is at the junction produced. Such as reference end temperature constant, the size and direction of thermoelectric potential only with the characteristics of two kinds of metal material and measure the temperature, and has nothing to do with potential galvanic fine and length. When measuring the temperature change, the potential potential changes, and the temperature and a fixed function relationship between thermoelectric potential, take advantage of this relationship can measure the temperature. Widely used in all kinds of temperature measurement, temperature measurement of components is thermocouple, can be used to measure the fluid under 1300 ℃, the temperature of the gas and solid medium, the characteristics of the thermocouple, advantages: 1. The use of the thermocouple is wide and resistance to high temperature, high pressure, in - 40℃- 1100 ℃ temperature range of normal use. 2. The use of the thermocouple length can be arbitrarily selected by the customer as required. 3. Its thermal inertia small, fast response. 4. Thermocouple good can be around and softness, can be applied to complex multiple measurement area, and simple installation. 5. Has good heat insulation performance, its close structure to ensure the thermocouple has the top-ranking insulation. 6. High mechanical strength, thermal electrode, insulation and high strength layer could be together, as a result, the thermocouple is with high intensity, and high pressure, high temperature resistant, resistant and shock resistance, impact resistance, can also be used in high pressure and vacuum environment. 7. Thermocouple of long life, because is to choose the casing airtight protection with chemical insulators, and therefore not perishable, short, etc. , can be used for a long time. At the same time, the thermocouple can also be used for Bla - B3c level zone with explosion danger place temperature measurement, ensure safety in production, in be used actually, thermocouple and general digital display table, recording instrument and computer systems.