Thermocouple and product application advantages of the development process of the resolution

In 1821, a physicist & other; 托马斯·塞贝克” Revealed that when two different metal wires a knot the ends of the connection in the circuit, when applied to the junction temperature, there will be an electric current through the circuit, this is called the electromagnetic field ( EMF) 。 Circuit of energy known as the seebeck effect. The use of Thomas & middot; Seebeck ( 托马斯·塞贝克) As a guide, the influence of the Italian physicist bordeaux Leo & middot; Billy ( Leopoldo Nobili） And marcelo doni Mr & middot; Meloni ( Macedonio Melloni） Cooperation in 1826 by designing a thermoelectric battery, called hot multiplier, it by combining a galvanometer draw inspiration from the seebeck thermoelectric found. And the thermopile used to calculate the radiation. For his efforts, some people think Nobili is the discoverer of the thermocouple.

thermocouple can be defined as a kind of temperature sensor, used in the form of the EMF or current measuring temperature at some particular point. The sensor consists of two different metal wires, they are in a joint together. Can measure the junction temperature and the temperature of the metal wire voltage change stimulation.

is a small amount of thermocouple EMF generated by the ( Millivolts) , so very sensitive equipment must be used to calculate circuit of electromotive force. Commonly used device is used to calculate the electromotive force voltage balance potentiometer and common galvanometer. From both physical or mechanical use of balancing potentiometer.

thermocouple it includes two different metal wires, and in the end connection together. Intersection is considered the end of the measurement. Knot at the end of the divided into three types, namely not grounding, grounding and exposed junction.

no grounding

in this type of knot, conductor and the protection cover completely separate. The application of knot is mainly including high pressure application engineering. Use of the main advantage is to reduce the stray magnetic field effect.

grounding in this type of joint, metal wire and protective cover together. The function to measure the temperature, the acid atmosphere and provide resistance to noise. Exposed junction

exposed junction is suitable for the need to quick response area. This type of knot used to measure the gas temperature. Used in the manufacture of thermocouple metal mainly depends on the calculation of temperature range.

usually, thermocouple design has two different kinds of metal wire, iron and constantan namely, through the connection in the joint of a called hot junction in the detecting element. It consists of two knots, a knot through the voltmeter or launcher, the cold junction and the second in a process known as hot junction is associated.

the advantages and disadvantages of thermocouple

benefits include the following content.

it is strong and durable, high accuracy can be used in harsh and high vibration environment.

temperature work soon polyure range is very wide.

low cost and wide working temperature range is extremely consistent

disadvantages include the following content.

it has low accuracy.

thermocouple calibration again hard to

some of the applications of the thermocouple thermocouple applications include the following content.

they are used as offices, homes, offices and enterprises in the thermostat temperature sensor.

the used in industry, used to monitor the iron, aluminum and metal temperature of the metal.

they used in low temperature and low temperature application in food industry. Thermocouple is used as the heat pump for thermoelectric cooling.

these for testing chemical plant, the temperature of the oil factory.

the used in gas machine to test pilot flame.