The effects of the external environment of PT100 temperature sensor

1, dust, damp environment

this should choose of pt100 temperature sensor of high, otherwise easy to cause the sensor short-circuit. Can reference sensor IP protection grade, choose the corresponding product. Moreover, temperature sensor, its sealing way also is different, must have very big distinction in sealing. Commonly used way of sealing sealant useful filling or coating; Rubber mat mechanical fastening seal; Welding and vacuum filling nitrogen seal. This sealing ways, welding sealing performance is best, followed by the rubber mat mechanical fastening seal, filling coated sealant for the worst. For general requirements are not strict sealing occasions, can choose glue sealing the sensor, and for some work in the damp, dust, high environment sensors, to seal way should choose after heat seal or welding sealing, vacuum filling nitrogen sealing products.

2, the high temperature environment

the environment easy to civilize the sensor coated material melt, solder joint structure change, the internal stress of elastomer and so on. This case should choose high temperature sensor; The best, even with heat insulation, water or air cooled device.

3, corrosive environment

sensor working in a corrosive environment, easy to cause casing damage, cause inside elastomer is impaired, even can cause short circuit, so should choose good corrosion resistance and impermeability good sensor. General choice made with stainless steel casing or surface corrosion products processing.

4, strong electromagnetic interference

strong electromagnetic environment will cause the sensor output signal distortion, the range is big, should be shielded processing, its until it has a good ability of resistance to electromagnetic interference.

5, inflammable, explosive environment

inflammable, explosive environment temperature sensor improper selection, will make its permanent damage, and its output is not correct signal to the control system, lead to wrong operation, and even a threat to other working equipment and personal safety. So, be careful to choose the work sensor, must use has explosion-proof performance. It not only needs to have a closure, but also consider the explosion intensity. Its cable cap also need to meet this requirement.

all in all, selection of sensors, we not only should see whether meet the requirements of its range, precision, also need to consider the use of the environment, according to the use of the environment, choose the corresponding product