American Sensor Technologies Inc. (AST) has developed a solid state pressure switch for the measurement of gases and liquids compatible with stainless steel. Constructed of stainless steel, the Model 1000 unit is designed for industrial, hydraulic, refrigeration, off-road and agricultural applications such as boiler controls, HVAC, filtration, and pipeline gas instrumentation. Model 1000 pressure switches feature a compact design with excellent long-term stability. Its one-piece diaphragm is free of internal O-rings, welds or fill fluids, eliminating the chance of process contamination. A high level of EMI/RFI protection (100V/m) shields the units against electrical noise and interference. Heavy-duty relay contacts offer electrical isolation up to 500VDC. Model 1000 units also have wide operating temperature ranging from -40 to 85ºC (-40 to 185ºF). The competitively priced Model 1000 offers a factory set switching point and hysteresis. Units offer switching capability of 1 amp @24V DC or 0.5 amps @ 125V AC, max. Open or closed output is provided, based on customer’s defined switching point. At lower currents, pressure switches exhibit a high switching cycle life of 2 million pressure cycles. Units are available in pressure ranges up to 10,000 psi.
