The Dwyer 1910-20 Series 1900 is a miniature rotary, normally-closed, magnetic differential pressure switch engineered for tight spaces. Built with a solid bronze quadrant lever and a heavy-duty 20" (508 mm) long bellows, it delivers reliable performance in demanding environments including boiler set points, gas meters, pneumatic systems, machine tools, and automotive applications.
Designed for use with 4/20" pipelines, this compact switch handles a differential pressure range of 4.0–20.0" WC, making it ideal for precision monitoring and control in MRO, industrial, and OEM installations where space and accuracy are critical.