Working principle of electric contact bimetallic thermometer and parameters

Electric contact bimetallic thermometer belongs to the commonly used industrial thermometer, it is often used in production field of temperature control and alarm automatically. Can be directly measured - all kinds of production process 50 - 500 c range, steam and gas medium temperature. Its working principle is to use the drive contact changes when temperature changes, when contact with the upper and lower limits or disconnected at the same time, make the circuit of relay action, to control and alarm automatically. The technical parameters of electric contact thermometer is as follows: product standards: JB/T8803 - 1998 GB3836- 8 dial nominal diameter: 100 precision grade: 1. Thermal response time: 5 & le; 40 s protection grade: IP55 normal working atmosphere conditions: temperature - 25 ~ + 55 ℃, relative humidity & le; 85% of set point error: set point error should not exceed the basic error of 1. 5 times switch: switch difference should not exceed the basic error of 1. 5 times. Switch repeatability: repeatability limit range is not greater than the absolute value of the basic error limits 1/2. Electric contact bimetallic temperature suitable for refrigeration equipment, Marine machinery, etc. , the production field of temperature control and alarm automatically.