... widely used for factory,oil field,chemical,metallurgy,etc Summary: LWGY basic type worm flow sensor (called sensor hereinafter ... used in the industries of factory, oil field,chemical industry,metallurgy, paper making and so on. It ... users need to use the sensor of special type, it can order under the negotiation with us ... to 500m.4. Explosion-proof class:Ex m II T4ModelDN(mm)Flow Range(m3/h)Max.Working ...