Bimetallic thermometer, pressure type thermometer thermometer instrument classification and performance

In life, the temperature of the measuring range, because different areas used, the required temperature is different, so, measuring temperature instrument is very widely used. According to the principle of classification, expanding type, thermal resistance, thermocouple and radiant; According to the measurement points and have contact and non-contact. Non-contact thermometer table are: double metal thermometer, pressure type thermometers, glass tube liquid thermometer, hot resistance thermometer, thermocouple thermometer non-contact thermometer table are as follows: under the optical pyrometer, radiation pyrometer said about the two different pressure type thermometer thermometer: gas ( Steam) Body, the liquid under the condition of constant volume, pressure change with temperature, precision grade in 1 - 2. Level 5, is characterized by simple structure and reliable, but relatively remote transmission, transmission distance & lt; 50m； Low precision, greatly influenced by environmental temperature, temperature range in 0 ~ 600 & deg; C, generally in 0 ~ 300 & deg; C is in the majority. Glass tube liquid thermometer: thermal expansion, the volume change with temperature, precision grade 0. 1 - 2. Level 5, simple structure, high precision; Reading inconvenience, not far eastone, temperature range - 200~600° C, is generally - 100~600° C heat resistance thermometer: metals or semiconductors, resistance with the temperature change, the accuracy grade 0. 5 - 3. 0, is characterized by high precision, convenient for remote transmission; Need to add power, to match display instrument, temperature range in - 258~1200° C, be in commonly - 200~650° Monochromatic radiation optical pyrometer C: object, strength and brightness change with temperature, precision grade 1. 0 - 1. Level 5, simple structure, easy to carry, not destroy the object temperature field; Easy to produce visual error, external reflection radiation will cause measurement error, temperature in the range of 200-3200 & deg; C, be in commonly 600 ~ 2400 & deg; C。 The above is the classification and properties of different temperature measuring meter, hope to help you understand the instrument is!