{"product_id":"barksdale-d1h-h18-pressure-vacuum-actuated-diaphragm-switch","title":"Barksdale D1H-H18 Pressure Vacuum Actuated Diaphragm Switch","description":"\u003cdiv\u003e\u003cp\u003eThe Barksdale D1H-H18 is a housed, diaphragm-style pressure\/vacuum switch with a single SPDT contact and an adjustable setpoint of 0.4–18 psi (0.03–1.2 bar). It uses a 1\/4\" NPT female pressure port and is built around an anodized aluminum housing with a NEMA 4 enclosure for reliability in demanding environments, while wetted parts consist of 304 stainless steel and a 17-7PH stainless steel diaphragm. Electrical ratings on housed models are up to 10 A at 125\/250 VAC and 3 A at 480 VAC, with optional UL approvals available. For wiring, housed units terminate via a 1\/2\" NPT conduit connection; stripped versions provide about 18 inches of free leads (approximately 18\" long, #16 AWG). The D1H-H18’s designation reflects its dual actuation capability (pressure or vacuum) in a compact package, making it suitable for process control tasks where a fixed pressure threshold must trigger a relay or interlock in pneumatic systems such as compressors, vacuum pumps, or other industrial equipment.\u003c\/p\u003e\u003c\/div\u003e","brand":"Barksdale","offers":[{"title":"Used Surplus - Excellent Condition","offer_id":51676678816046,"sku":null,"price":164.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0818\/1038\/files\/Ebay_website_image_74515fc1-f082-4893-9bcc-2bb36b2c73ef.jpg?v=1769552324","url":"https:\/\/plgautomation.com\/products\/barksdale-d1h-h18-pressure-vacuum-actuated-diaphragm-switch","provider":"PLG Automation ","version":"1.0","type":"link"}