How to correctly choose the bimetallic thermometer

Bimetallic thermometer is mainly used in industry of element is one with two or more pieces of metal laminate composed of multilayer metal together. In order to improve the temperature measuring sensitivity, will be made of metal spiral coil shape. When multi-layer metal temperature change, the layers of metal expansion or contraction, makes the spiral coil rolled up or let go. As a result of the spiral coil end fixed and the other end connected to a free rotating pointer, therefore, when the bimetallic strip feel the temperature change, Pointers can be on a circular dividing scale to indicate the temperature. This kind of instrument of temperature measurement range is - 80 ~ 650 ℃, the permissible error are scale equation 1. About 5%. Bimetallic thermometer and the rod of glass liquid thermometer USES similar, but can be used under the condition of higher mechanical strength. And have waterproof, corrosion resistance, vibration resistance, intuitive, easy reading, no mercury pollution, strong and durable, etc. Alternative to many other line temperature instrument, widely used in petroleum, chemical industry, machinery, ships, electricity, textile, printing and dyeing and other industrial and scientific research departments. In practice, bimetallic thermometer protecting tube made of stainless steel and molybdenum titanium, is under pressure, and other significant characteristics of anti-corrosion ability. Dial line includes: the axial, radial and 135 degree type, universal type varieties, suitable for all kinds of field according to the needs. We can according to the need of the use of field and using range, choose suitable bimetallic thermometer.