Mercoid 压力开关,液位开关,温度开关,Dwyer Instruments Inc Mercoid Controls produces a broad range of pressure, temperature, and level controls for use in heavy industrial, petrochemical, and electrical utility plants. Established in 1916, Mercoid has been serving industry for over 80 years. Our joining with Dwyer Instruments, Inc.,combines over 150 years of experience to produce an even stronger and more resourceful company to serve your instumentation and control needs.We have over 3,000 products from Dwyer, Mercoid, W.E. Anderson, Proximity and Love Controls including the Mercoid DA Series.