The high temperature environment causes the sensor to melt the coating material, open the solder joint, and cause structural changes in the internal stress of the elastomer. For sensors working in high temperature environments, high temperature resistant sensors are often used; in addition, devices such as heat insulation, water cooling or air cooling must be added.
Dust and moisture can cause short-circuit effects on the sensor. In this environmental condition, a sensor with high airtightness should be selected. Different sensors have different sealing methods, and their airtightness is very different. Common seals include sealant filling or coating; rubber pads are mechanically fastened and sealed; welding (argon arc welding, plasma beam welding) and vacuum nitrogen-filled sealing. From the perspective of sealing effect, welding sealing is the best, and filling and coating sealant is the worst. For sensors that work in a clean and dry indoor environment, you can choose a glue-sealed sensor, and for some sensors that work in a humid and dusty environment, you should choose a diaphragm heat seal or diaphragm welding seal, pumping Vacuum nitrogen filled sensor.
In a highly corrosive environment, such as moisture and acidity, which may damage the elastomer or cause a short circuit, the outer surface should be oversprayed or a stainless steel cover should be selected, and the sensor with good corrosion resistance and good airtightness should be selected.
The influence of electromagnetic field on sensor output disturbance signal. In this case, the shielding of the sensor should be strictly checked to see if it has good electromagnetic resistance.
Flammable and explosive not only cause complete damage to the sensor, but also pose a great threat to other equipment and personal safety. Therefore, sensors working in flammable and explosive environments put forward higher requirements for explosion-proof performance: explosion-proof sensors must be selected in flammable and explosive environments. The sealing cover of this sensor must not only consider its airtightness, but also The explosion-proof strength, as well as the waterproof, moisture-proof and explosion-proof properties of the cable leads should be considered.
