The influence of load cell in high temperature environment

(1) The influence of dust and moisture on the sensor caused by short circuit. 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 gasket mechanical tightening seal; welding (argon arc welding, plasma beam welding) and vacuum nitrogen filling seal. From the perspective of the sealing effect, welding and sealing are good, and filling and coating sealant is poor. For sensors that work in a clean and dry indoor environment, you can choose a glue-sealed sensor. For some sensors that work in a humid and dusty environment, you should choose a diaphragm heat seal or a diaphragm welding seal, and Vacuum nitrogen filled sensor. (2) The high temperature environment causes problems such as melting of the coating material, opening of the solder joints, and structural changes in the stress in the elastomer. For sensors working in high temperature environments, high temperature resistant sensors are often used; in addition, heat insulation, water cooling or air cooling must be installed.

(3) 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.

(4) In a highly corrosive environment, such as damp or acid causing damage to the elastic body or short circuit of the sensor, the outer surface should be sprayed or stainless steel cover, with good corrosion resistance and good airtightness sensor.

(5) Flammable and explosive not only cause thorough damage to the load cell, but also pose a great threat to other equipment and personal safety. Therefore, sensors that work in flammable and explosive environments have higher requirements for explosion-proof performance: explosion-proof sensors must be selected in flammable and explosive environments. The sealed housing of such sensors must not only consider its airtightness, but also Consider the explosion-proof strength, as well as the waterproof, moisture-proof, and explosion-proof properties of the cable leads