What are common pointer thermometer?

Work in the factory, the site of the people can know, many different kinds of thermometer, structure form to say! Can be divided into: liquid level calibration type, digital display type, pointer type categories, such as pointer thermometer is one of our common thermometer. Pointer thermometer is shaped like a dashboard with indicator pointer thermometer, some places called pointer thermometer thermometer, because of its appearance like a clock, to measure temperature, called a thermometer. Common pointer thermometer with double metal thermometer, pressure type thermometer, the following is a simple introduction of these two kinds of thermometer. Pressure type thermometer is the use of temperature measuring the pressure of the material in sealing system to measure temperature with the temperature change. According to the temperature material filling phase, inflatable, liquid type and steam type three, similar structure. According to its function division are classified as indicating, recording, alarm, type ( With the contact point) Such as type and temperature control type. They are basically the same structure. Pressure type thermometer mainly: the joint of inductive charging temperature, medium temperature bag, the pressure element ( Capillary) And pressure sensitive components ( Spring tube) All metal components, consisting of pressure type thermometer structure is simple, cheap, calibration is clear. Because can remote transmission, and does not need power supply, use does not produce sparks, it has anti explosion. Bimetallic thermometer is made of metal principle of heat bilges cold shrink. It is a bimetallic strip as a temperature sensing element, is used to control a pointer. Bimetallic strip is usually with copper and iron rivet, and copper in the left, iron on the right. As a result of the copper heat bilges cold shrink effect is more obvious than iron, so when the temperature rises, the copper retraction of the plate bending to the right hands under the drive of bimetallic strip will turn to the right; On the other hand, the temperature become low, pointer under the drive of bimetallic strip is deflected to the left. Why are frequently used pointer thermometer? Because the pointer thermometer have strong and durable, showing the advantages of intuitive, and metallic appearance is good, give a person a kind of beautiful feeling.