Two metal strips will expand in different ways

• Posted by okate cixi May 19, 2021 - Filed in Other - #Pressure type thermometer，pressure gauge factory  - 992 views

  　　Spiral ribbon bimetal thermometer

  　　As the name suggests, this shape of the thermometer uses a spiral bimetallic strip to measure temperature. The pointer is connected by a shaft at the free end of the strip. The strip is spirally wound inside the rod. As the temperature increases, the spiral strip senses temperature changes. Strip-shaped metal with a higher coefficient of thermal expansion expands and winds along the stem, causing the shaft to rotate. This rotation causes the pointer to move in the dial, thereby indicating the temperature of the medium. As the temperature decreases, the metal with a lower coefficient of thermal expansion shrinks and rotates the shaft. The hands than read the lower temperature in the dial.

  　　They can be placed in thermowells that can operate in high temperature and high-pressure environments, so they are mainly used in industrial applications.

  　　Spiral ribbon bimetal thermometer

  　　Use a spiral strip to measure the temperature in a bimetal spiral strip thermometer. As the temperature increases, the two metal strips will expand in different ways. This produces a bending effect, and the winding of the ribbon coil causes the metal with a higher thermal coefficient to form the outer side of the arc. As the temperature decreases, the metal with a lower thermal coefficient forms the inner layer of the arc. The pointer and dial connected to the spiral read this deformation, which indicates the temperature of the medium.

  　　Pressure gauge factory's bimetallic thermometers are mainly used in thermostats or to measure ambient temperature because they are sensitive to lower temperature changes.

  　　Pressure type thermometer is also our product, welcome to consult and purchase.