Contact type and non-contact temperature measuring characteristic comparison

Way of contact type and non-contact measuring condition thermal element will contact with the object being measured is good; Temperature sensing element to join almost without changing the temperature of the object; Measured temperature does not exceed thermal element can withstand the upper limit of temperature; Measured object not corrosion thermal component needs to accurately know the surface emissivity of object; The radiant energy sufficient exposure to the object detecting element on the measurement range is especially suitable for below 1200 ℃, hot melt, non-corrosive object continuous online temperature measurement, temperature measurement of higher than 1300 ℃ or more difficult can range from ultra-low temperature to high temperature, but under 1000 ℃, the measurement error is big, can moving object and the object of small hot melt temperature measurement tables are often used in industry to 1. 0, 0. 5, 0. 2 and 0. Level 1, laboratory table can reach 0. Usually is 1 01 level. 0 and 1. 5, 2. Level 5 response speed slow, usually for a few seconds to a few minutes fast, other features is usually 2 ~ 3 seconds the temperature measurement system has simple structure, small volume, reliable, convenient maintenance and low price, meter reading directly reflect the actual temperature object to be tested; Can easily form multiplex concentration measurement and control system structure complex, large volume, adjustment problems, the price is expensive; Meter reading usually only reflect the surface temperature of object to be tested, Need to be further revised) ； Not easy to form integration of temperature measurement, temperature control temperature control device.