How many variations are there between VOC gas detectors?
As we all know, there are many detection principles for gas detectors, and there are three types of VOC. As one of the two major categories of gases (toxic and harmful and flammable and explosive), VOC has roughly three detection principles, so VOC gas detectors How much difference does the principle make?
The electrochemistry that everyone is most often exposed to, whether it is a solid-state electrolytic meter or a liquid electrolytic meter, the electrochemical principle must have oxygen to participate in the reaction, which is displayed on the electrode plate. If the electrochemical sensor is used, it can be used for a long time without exploding the meter. The general lifespan is two years.
But what many people don't know is that the electrochemical sensor can only measure more than 20 kinds of gases contained in VOC. Compared with it at the same time, PID can detect more than 100 kinds of gases. It has separate regulations.
In foreign countries, Class I (matte) coatings shall not exceed 30g per liter, Class II (glossy) shall not exceed 200 g per liter, domestic requirements shall not exceed 100g per liter, PID photoion has a light source, generally It can be used for 5 years (ultraviolet rays), but the lamp post is easy to break, as a wearing part, it costs about 1,000 to replace it.
According to the regulations of the domestic environmental protection bureau, PID is generally required at the minimum, but because many people are shoddy, this market is also chaotic, and FID, hydrogen flame ion, because both electrochemistry and PID can only measure the total amount of VOC, FID can display Various gases are also sought after by many people, but to be honest, domestic FIDs are still not as good as imported ones, and the portable and fixed types are complete.
