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technical article
Structural characteristics of thermometer and use method
2011-12-21 11:12:26


是用绕成螺纹旋形的热双金属片作感温元件,并将它装在保护套内,一端固定(固定端),另一端(自由端)连接在一根细轴上, The bimetal thermometer uses a hot bimetal sheet wound into a thread as a temperature sensing element and is installed in a protective sleeve. One end is fixed (fixed end) and the other end (free end) is connected to a thin shaft.

The shaft end is equipped with a pointer. When the temperature changes, the free end of the temperature sensing element rotates immediately, so that the fine axis drives the pointer to produce angular displacement, and the temperature change is indicated on the dial.

Drive the pointer to the transmission. 指针所指示的位置即是被测温度值。 Since the temperature sensing element has a linear relationship with the temperature change, the position indicated by the pointer of the bimetal thermometer is the measured temperature value. Case materials are steel, cast alloy,

Rusted steel plate; the detection element also has a core-pulling structure; the head part of the adjustable angle thermometer can be converted from an angle type to a straight type or an angle from a straight type to an angle type by means of a bellows and a corner mechanism.


是利用两种不同金属在温度改变时膨胀程度不同的原理工作的。 Bimetal thermometers work on the principle that two different metals expand differently when the temperature changes. The main component of the industrial bimetal thermometer is a stack of two or more metal sheets stacked together.

Into a multilayer metal sheet. In order to improve the temperature measurement sensitivity, the metal sheet is usually made into a spiral shape. When the temperature of the multi-layer metal sheet changes, the amount of expansion or contraction of each layer of metal varies, so that the spiral coil is rolled up or loosened.

Because one end of the spiral coil is fixed and the other end is connected to a pointer that can be rotated freely, when the bimetallic piece experiences a temperature change, the pointer can indicate the temperature on a circular indexing scale.