There are manygas detectorSome manufacturers use flameproof typesgas detector, there is no intrinsic safety and explosion-proof function. They cannot pass the accuracy test of the National Institute of Standards and Metrology, so they use the appearance test certificate as the product accuracy test certificate. Some manufacturers buy certificates from some loosely managed testing institutions in other places, and if consumers buy such products and use them in high-risk places, it will bring safety hazards.
Due to price and other factors, most of the products on the market currently use flameproof technology, and only a few products use intrinsically safe explosion-proof technology. What is the difference between the two?
The explosion-proof type has explosion-proof performance requirements. It isolates the flammable and explosive mixture through the equipment shell, when the equipment is short-circuited, when the equipment is damaged, it will produce an electric spark or when the flammable and explosive mixture (gas or dust) explodes inside the equipment, but due to the isolation and cooling effect of the shell, prevent the explosion from extending to the outside of the shell to achieve the explosion-proof effect.
The intrinsically safe type is intrinsically safe, which starts from limiting the energy, reliably limiting the voltage and current in the circuit to the allowable range, so as to ensure that the electric spark and thermal effect generated in the case of normal operation or damage to the short-circuit element will not cause the explosion of dangerous gases around it, so the intrinsically safe explosion-proof type is the explosion-proof type with the highest safety level.
So, how do we choose a regular, safe, and reliable gas detector manufacturer?
First of all, it depends on whether the manufacturer has a CNEX explosion-proof certificate. The purpose of CNEX explosion-proof certification is to eliminate hazardous factors in facilities in explosive hazardous locations. CNEX explosion-proof certificate refers to the explosion-proof product certificate issued after the final product has been tested by the National Explosion-proof Electrical Product Quality Supervision and Inspection Center and meets the explosion-proof requirements. Therefore, only the CNEX certificate issued by the national authority can the gas detector have intrinsic safety and explosion-proof functions and can be used in hazardous places.
Secondly, high measurement accuracy is also a requirement for gas detectors. Produced by Honeywellgas detectorImported first-line brand sensors are adopted. After our unique compensation algorithm and multi-level standard gas calibration, it has the characteristics of sensitive response, high measurement accuracy, strong anti-interference ability, small size, light weight, safety and reliability. After formal measurement verification, it has obtained the verification certificate of Shenzhen Institute of Metrology, which is authoritative and reliable.