Dwyer 1920-00 is a compact low differential pressure switch suitable for air and non-combustible compatible gases. With a operating temperature ranging from -30 to 180°F (-34 to 82.2°C), it has a diaphragm in a vertical position and a 1/8" female NPT process connection. The switch is single-pole double-throw (SPDT), with 3 screw type electrical connections, and an electrical rating of 15 A @ 120-480 VAC. The set point adjustment is screw-type inside the conduit enclosure, and it has a ±3% repeatability.