The effects of the external environment of PT100 temperature thermocouple sensor

1, dust, damp environment

this should choose high pt100 temperature thermocouple sensors in sealing, otherwise easy to cause the thermocouple sensor is short circuit. Can refer to the thermocouple sensor IP protection grade, choose the corresponding product. And thermocouple temperature sensor is different, its sealing way is different, also 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 not strict sealing occasions, the choice of glue sealing the thermocouple sensor, for some work in the damp, dust, high environment thermocouple sensor, to seal mode should be chosen through heat seal or welding sealing, vacuum filling nitrogen sealing products.

2, the high temperature environment

the environment of the thermocouple sensor easily melt coating material, solder joint civilized, elastomer stresses in the structure change and so on. This case should choose high-temperature thermocouple sensor; The best, even with heat insulation, water or air cooled device.

3, corrosive environment

thermocouple 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 thermocouple sensor. General choice made with stainless steel casing or surface corrosion products processing.

4, strong electromagnetic interference

strong electromagnetic environment will cause the thermocouple sensor output signal distortion, 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 thermocouple sensors 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. Work, therefore, be careful to choose this case of thermocouple 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, selects the thermocouple sensor, 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