Thermocouple sensor is a sensor capable of measuring the temperature is so high that the thermocouple temperature sensor is often used for oil processing industry or steel. Thermocouple temperature sensor has a smaller output value to the high noise level conditions, thus requiring signal conditioners so that the output value can be read.
Thermocouple history
Derived from the word “Thermo” means heat energy and “Couple” which means the meeting of the two objects. Thermocouple is active temperature transducer composed of two different metals with a reading at the meeting point of the two metals and the other point as its output. Thermocouple is one of the most common sensors used to measure temperature because it is relatively inexpensive yet accurate which can operate at temperatures of heat or cold.
Construction Thermocouple Temperature Sensor
Derived from the word “Thermo” means heat energy and “Couple” which means the meeting of the two objects. Thermocouple is active temperature transducer composed of two different metals with a reading at the meeting point of the two metals and the other point as its output. Thermocouple is one of the most common sensors used to measure temperature because it is relatively inexpensive yet accurate which can operate at temperatures of heat or cold.
Symbol of Thermocouple
construction Thermocouple
Thermoelectric phenomenon was first discovered in 1821 by a German scientist, Thomas Johann Seebeck. He connects the copper and iron in a circuit. In between these metals and then put the compass needle. When the metal is heated, it turns the compass needle move. Later known, this is the case because electricity that occurs in metals cause the magnetic field. This magnetic field that moves a compass needle. The phenomenon became known as the Seebeck effect
Thermocouple temperature sensor output voltage in the form of units of milli Volt. Here are some of the behavior and characteristics of the type of thermocouple
Picture. The behavior of some types of thermocouple
The Seebeck invention provides inspiration to Jean Charles Peltier to see the opposite of the phenomenon. He is an electric discharge on two pieces of metal that are glued in a circuit. When electric current is applied, heat absorption occurs at the junction of the two metals and the release of heat on the other connection. Release and heat absorption are mutually turned so the current direction is reversed.
The discovery happened in 1934 it became known as the Peltier effect. Sir William Thomson, find direction of current flows from the hot spot to the point of cold and vice versa. Seebeck effect, Peltier, and Thomson is then the basis for the development of thermoelectric technology.
This type includes the type of the oldest, whose construction consists of a glass tube that has a small capillary tube containing a liquid vacuum and is usually in the form of mercury. Changes heat causes expansion of the fluid changes or known temperature to volumatic volumetric change then change to levels simultaneously. This level change stating changes in heat or temperature, accuracy depends on the type of design or precision tubes, also penyekalannya.
Another way is the use of this type of gas filled tube gas associated with capillary tube is protected by a spiral leading to the spiral Bourdon used to drive the pivot, then move the pointer. Data specification of the type of thermocouple
