Which environments will affect the weighbridge sensor
2022-09-30 08:07:10
A weighbridge sensor is a type of load cell that is a device that converts a quality signal into a measurable electrical signal output. Common floor scale sensors are mostly resistance strain sensors. The sensor must first consider the actual working environment of the sensor. This is crucial for the correct selection of the sensor. It is related to the normal operation of the sensor, its safety and service life, and the reliability and safety of the entire scale. So which environments will affect the weighbridge sensor?
1. In the environment with high corrosivity, such as moisture, acidity, damage to the sensor caused by elastomer or short circuit, etc., the outer surface should be sprayed or stainless steel cover, good anti-corrosion performance and good airtightness sensor .
2, the high temperature environment causes problems such as melting of the coating material, opening of the solder joint, structural change of the stress in the elastic body. High temperature sensors are often used for sensors operating in high temperature environments; in addition, devices such as heat insulation, water cooling or air cooling must be added.
3 , dust, moisture on the sensor caused by a short circuit. Under these environmental conditions, a sensor with high airtightness should be used. Different sensors have different ways of sealing, and their airtightness is very different.
Common seals are filled or coated with sealant; mechanically sealed seals for rubber pads; welded (argon arc welding, plasma beam welding) and vacuum-filled nitrogen seals.
From the sealing effect point of view, the welding seal is good, and the filling of the sealant is the amount difference. For sensors working in a clean and dry environment, you can choose a rubber-sealed sensor. For some sensors that work in a humid, dusty environment, you should choose a diaphragm heat seal or a diaphragm weld seal. Vacuum nitrogen filled sensor.
4 , flammable, explosive not only causes complete damage to the sensor, but also poses a great threat to other equipment and personal safety. Therefore, sensors operating in flammable and explosive environments put forward higher requirements for explosion-proof performance: explosion-proof sensors must be used in flammable and explosive environments. The sealed cover of such sensors should not only consider its tightness, but also It is necessary to take into account the explosion-proof strength and the waterproof, moisture-proof and explosion-proof properties of the cable lead.
5 , the influence of electromagnetic field on the sensor output turbulence signal. In this case, the shielding of the sensor should be strictly checked to see if it has good electromagnetic resistance.
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