For sale is a This Barksdale Pressure Switch p/n D1H-H18SS is a weld-sealed metal diaphragm, SINGLE setting, SPDT local mount 1/4 inch NPT Pressure Switch. This Pressure switch is watertight and dusttight and rated for indoor or outdoor (NEMA 4) service. It is oiltight and dustight (NEMA 13). The D1HH18SS has FREE LEADS through a 1/2 inch NPT conduit connector and has a tamperproof external adjustment. Switch is rated 10 amps 120 or 240 VAC. Barksdale D1H-H18SS SINGLE setting diaphragm pressure switch.