Views: 0 Author: Site Editor Publish Time: 2022-11-03 Origin: Site
In flammable and explosive environments, we prefer to use explosion-proof sensors weighing load cell. In order to avoid explosions, we usually choose products with explosion-proof requirements. The explosion-proof methods of the weighing load cell sensor mainly include explosive gas control, explosion control and ignition source control. The working principle of the explosion-proof sensor load cell is briefly introduced below.
1:Explosive gas control
The working principle is to fill a sealed explosion-proof box with clean gas or inert gas without explosive gas. The air pressure inside the box is slightly higher than the air pressure outside the box. The weighing load cell sensor is installed in the box, so that it can be well protected against explosive gases. The explosion plays a good anti-explosion effect.
The working principle is based on Exd standard, the sensor weighing load cell shell is designed according to the explosion-proof standard shell, the instrument is designed according to the explosion-proof standard shell, and all management methods are designed, manufactured and assembled strictly according to the specifications, so that the explosion in the shell will not stimulate the explosion of the dangerous gas outside the shell. The design and manufacturing standards for explosion-proof and explosion-proof methods are extremely strict, and the operating procedures for assembly, wiring, and maintenance are also strict. This method determines that explosion-proof electrical equipment and instruments are often strict, and the operation must be cut off, but it is also a useful method in many cases.
3:Ignition source control
The working principle is to use isolated wiring and process the power distribution of the sensor weighing load cell, so that the electric energy provided to the field sensor is limited to neither generating enough ignition spark nor making the temperature rise of the instrument surface enough to detonate. According to the standard, when the equipment connected to the safety barrier fails, actual explosion-proof measures should be taken to ensure explosion-proof in hazardous locations. Choose intrinsically safe and flameproof sensors and meters according to different applications and configurations, and request explosion-proof certification from the supplier.