Automatic industrial automation mentioned explosion-proof sensors have a lot of this concept, in the first explosion can roughly describe as a substance from one state, through physical or chemical change, suddenly become another kind of state, and let out a huge amount of energy. Dramatic speed release of energy, will make the surrounding objects subjected to violent impact and destruction, and the application of some sensors are necessary to meet explosion-proof conditions.
A similar Angle sensor, acceleration sensor and so on why explosion-proof? First is the application place and explosive material, a lot of places of production will produce some combustible materials. Coal mine around two-thirds of all the places there is explosive material, chemical industry, there are about more than 80% of the production workshop area there is explosive material. Oxygen, oxygen in the air is everywhere. Ignition source, it is used in great quantities in the production process of electric instrument, various electric spark of friction, abrasion spark, static electricity spark, high temperature, such as inevitable, especially when the instrument, electrical failure, objectively many industrial explosion conditions on site. When explosive material mixed with oxygen concentration in the explosion limit range, if any explosion source, will be an explosion. So take explosion protection is very necessary, also involves the explosion-proof sensor is also have to do.
Sensor of explosion-proof identification is necessary to identify, for example, flameproof, isolation of ignition source. The Ann model is to limit the energy of the ignition source, type or oil filled said dangerous substances and the applicability of the ignition source is separated explosion proof for the dangerous sites. And sensor explosion-proof marks: Ex (ia) Ⅱ C T6, Ex is represented as generally to meet certain standards of explosion-proof explosion-proof statement, such as the national standard of our country. Said the Ex explosion-proof, explosion-proof ia said grades, Ⅱ C said gas group, T4 represent temperature group. Explosion-proof marks format refers to the factory or mine explosion danger of medium, according to the ignition energy, minimum ignition temperature and time for the explosive dangerous gas exist periodic grade of scientific classification, to determine the explosion protection signs and form of explosion-proof equipment.
Angle sensor application in special place is the need to achieve explosion-proof, acceleration sensor application is to do the explosion-proof, in special places for explosion-proof sensor applied in any possible explosion places is necessary, not only in the protection of the sensor, will also be an important reminder of when operating people.
