Overview of the temperature instrument and types and parameters

Overview of the temperature instrument and types: temperature instrument is a branch of the instrument, the temperature of the common instrument has a thermometer, temperature recorder, temperature to send a modulator and so on. Temperature gauge transducer according to temperature measuring methods can be divided into two types: contact and non-contact. Often contact thermometer table thermometer table is simple, reliable, high measuring accuracy; But because of the temperature measuring element and need to be fully measured medium heat transformers, it takes time to help to reach thermal equilibrium, so there is temperature measurement delay phenomenon, at the same time restricted by high temperature resistant material, can not be applied to high temperature measurement. Non-contact instrument measuring temperature is through the principle of thermal radiation to measure temperature, temperature measuring element does not need to contact with the measured medium, temperature measuring range, not limited by temperature measuring limit, also won't destroy the temperature field of the object to be tested, reaction speed is generally faster; But by the object emissivity, measuring distance, the influence of external factors such as dust and moisture, its measurement error is bigger. Temperature instrument is usually an instrument and secondary instrument, an instrument is usually: thermocouple, heat resistance, bimetallic thermometer, in situ temperature display, such as secondary instrument is usually temperature recorder, temperature inspection instrument, temperature display, temperature control meter, temperature transmitter, etc.