Dwyer APS-450 is an Adjustable Pressure Switch designed for use in a wide temperature range of -65 to 225°F (-54 to 107°C) with a set point change of up to 2% below -10°F (-23°C) or above 125°F (52°C). It features a 3-wire, 20 AWG insulated electrical connection, suitable for liquids or gases. The wetted material is made of 17-7 PH SS and 303 stainless steel. With a 1/8" male NPT process connection, it is capable of handling pressure/vacuum limits of up to 150% of the range. The switch type is SPDT snap action, with an electrical rating of 5 A @ 250 VAC and 3 A @ 28 VDC. It has a cycling rate of not exceeding 20 CPM and is field adjustable for set points, using the capsule sensor element.