The Model 1000 pressure switch from American Sensor Technologies Inc., Landing, N.J., works with gases and liquids, and is rugged enough to work in industrial, hydraulic, off-road, and agricultural applications, according to the company. The compact switch uses a one-piece diaphragm with no internal O-rings, welds, or fill fluids. This eliminates contamination. Heavy-duty electrical contacts provide electrical isolation up to 500-Vdc, and the units offer 110 V/m of RFI/EMI shielding. The sensors operate in temperatures from 40 to 185°F (40 to 85 °C). Switching capability is rated at 1 A at 24 Vdc or 0.5 A at 125 Vac. Output can be open or closed and is based on the customer's defined switch point. With low currents, the switches have a life of 2 million pressure cycles. Units can be made with pressure ranges up to 10,000 psi.