... sampler,digital timer,constant flow circuit,low voltage protector,intrinsically safe circuit,compact structure. ApplicationThis product is composed of aspirator, ... timer, flux constant circuit, under voltage protector, and intrinsically safe power. Equipped with a group of micro-dust pre-trap ... flowmeter2.5Explosion protectionExibd IDimensions120mm×80mm×42mmWeight450g CCZ2 individual dust catcher