That is commonly used in industry are the contact thermometer?

We use common industrial non-contact thermometer mainly bimetallic thermometer, pressure type thermometer and glass rod thermometer. Bimetallic thermometer is suitable for the industrial site inspection instrument measurement, low temperature, can be used to directly measure the temperature of the gas, liquid and steam. It compared with industrial mercury thermometer, a mercury-free harm, easy reading, solid and the advantages of resistance to vibration, can replace industrial glass mercury thermometer. Glass thermometer range of 0 ~ 100 ℃, generally use is divided into ordinary and precision. Normal use thermometer: 1. Level 5 or level 1. Precision measuring thermometer: should choose 0. Level 5 or 0. 25. Good linearity, simple structure, convenient use, the price is cheap and high accuracy, etc. The temperature measurement range are not allowed to exceed the maximum thermometer. Pressure type thermometer range of 0 ~ 150 ℃, generally use divide into two kinds, gas and liquid gas type - use scope 80~600℃，1. 0 to 1. Using range - 5% accuracy, the liquid type 80~600℃，1. 0 ~ 2. 5% accuracy. Structure is simple, the price is generally, good vibration resistance, can close remote measuring equipment in gas, liquid and steam temperature, calibration is clear, the charged contact can be used as a control, the environmental requirements is not high, but the instrument time constant is big, accuracy is not high, avoid the use of the location of the first third scale, cannot connect to record and control instrument.