Diaphragm pressure switch MW1

SPDTfor liquidsfor gas

Pressure monitoring and control of processes Safety-critical applications in general process instrumentation, especially in the chemical and petrochemical industries, oil and gas industries, power generation incl. nuclear power plants, water/wastewater industries, mining For gaseous and liquid, aggressive and highly viscous or contaminated media, also in aggressive environments Special Features Intrinsic safety Ex ia available 1 or 2 independent switch points, high switching power up to AC 250 V, 20 A Switch point repeatability < 1 % Description These high-quality diaphragm pressure switches have been developed especially for safety-critical applications. The great advantage of diaphragm pressure switches is that no supply voltage is required for the switching process. In production, the diaphragm pressure switches are traced by quality assurance software at every step and subsequently are 100 % tested. The robust switch enclosure from stainless steel 316L can withstand the rough and corrosive operating conditions of the process industry with working ranges of up to 600 bar. The diaphragm pressure switch is fitted with 1 or 2 microswitches, which make it possible to switch an electrical load of up to AC 250 V, 20 A directly. For lower switching power ratings, such as for PLC applications, argon gas-filled microswitches with gold-plated contacts are available. Depending on the application, the appropriate variant for the contact version and the electrical connection can be selected; e.g. adjustable dead band instead of fixed dead band is often a feature necessary for control processes. By using a diaphragm measuring system,