Most workplaces require 0.5-4 mg per m3.
1, generally toxic dust, the concentration requirements are very low, it must be protected. For example, chemicals, pharmaceuticals, silica, etc.
2, low toxicity non-toxic dust, generally harmful dust, the concentration must not be higher than 4 mg, you must wear a dust mask.
3, the principle is that toxic dust, ultra-fine dust, choose N100 level dust mask, basically can effectively protect.
If the dust concentration exceeds the limit by more than 10 times, a full protective or active air supply protective mask must be used.
This protection requirement was introduced before the new dust mask standard was introduced.
According to the current dust mask standard, N100 dust masks, even if it exceeds the limit of 100 times the low toxicity, non-toxic environment, people's health is still guaranteed.
We can use the portable microcomputer dust meter MHY-7007 to quickly measure the PM10 concentration of respirable particulate matter in public places, and measure the respiratory dust and total dust in the labor hygiene of industrial and mining enterprises.
Portable & Multifunctional Changing Bag
Portable & Multifunctional Changing Bags are becoming more and more popular as regular items for babies and parents. Whether it is a long-distance travel or a short trip, the Mummy Bag provides important convenience for babies and parents. The popularity of mommy bags has caused new parents to pay attention to infant travel, not only psychologically but also physical changes, with great significance.
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