All stainless steel bimetallic thermometer helical structure

All stainless steel bimetallic thermometer temperature sensing element is by the different expansion coefficient of two kinds of metal joint together firmly. At one end to the fixed end, when the temperature changes, due to the expansion coefficient of two kinds of materials, and make a change in the curvature of bimetallic strip. Freedom of the tiny, through the transmission mechanism to drive the pointer indicates the corresponding temperature. Bimetallic strip passive layer ( Refers to the linear expansion coefficient of low layer) Commonly used iron nickel alloy, the active layer material with brass, iron copper constantan, nickel alloy, etc.

all stainless steel bimetallic thermometer a mercury-free harm, the instructions clear, strong, resistant to shock, etc. Suitable for low temperature of liquid, gas, and steam site inspection. All instruments of stainless steel material, good waterproof, decay resistance performance. It is widely used in petroleum, chemical, metallurgical, textile, food and other industries.

in order to improve the temperature measuring sensitivity, is usually made of metal spiral coil shape, can increase the length of the bimetallic strip through screw processing. When multi-layer metal temperature change, the layers of metal expansion or contraction, makes the spiral coil rolled up or let go. Due to the end fixed and the other end of the spiral coil and a free rotating pointer is linked together, and when the temperature changes, due to the different expansion coefficient of metal of different makes the spiral sheet metal deformation occurs, or expanding or contracting, drive the meter pointer, so as to definite temperature, the thermometer measurement range is - 40 ~ 550 ℃, the permissible error: + / - 1. 6 degrees. Therefore, when the bimetallic strip feel the temperature change, Pointers can be on a circular dividing scale to indicate the temperature.