Chinese handheld gas detector actually have too many types. Most are not explosion proof, which are safe under OSHA for industrial use. However, sellers still sell for profit and customers do not know and want to buy cheap goods.
Fixed gas detector are less of a category and more are produced industrially oriented. However, the Chinese gas gauge upper gold bran is sufficient. TES Industry only sells when it has tested and ensured quality. Guests can refer to China Gas detector, good-type, TGAS-1031.