Contact type and non-contact comparison of temperature instrument

Temperature measuring instrument according to temperature measuring methods can be divided into contact and non-contact thermometer thermometer two kinds, such as WSS series bimetallic thermometer is non-contact thermometer, infrared thermometer for non-contact thermometer. Temperature instrument of contact type and non-contact comparison: 1, the contact will destroy the tested temperature field, and the temperature measuring element is used biochemical reaction; Non-contact does not exist the problem. 2, contact the time lag is bigger; Non-contact reflect fast. 3, high temperature is limited by a certain contact measurement; Non-contact measurement of high temperature limit. 4, contact temperature measurement can measure low temperature and ultra-low temperature; Non-contact temperature measurement is not suitable for low temperature measurement. 5, non-contact thermometer structure is simple, reliable, high measurement precision, precision in & plusmn; Less than 1%. Non-contact temperature measuring complex structure, temperature measuring analyte by affect the thermal emission rate and the environmental conditions, measurement error is bigger, average accuracy in & plusmn; More than 1%.