{"product_id":"dwyer-instruments-lf251-200-4l-200-psi-pressure-gauge-2-5-in-dial","title":"Dwyer Instruments lf251-200-4l 200 Psi Pressure Gauge 2.5 in Dial","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe DWYER INSTRUMENTS lf251-200-4l is a liquid filled industrial pressure gauge designed for demanding process and mechanical system applications. It features a 2.5 inch dial face calibrated to 200 psi, a 0.25 inch male pipe thread (MPT) lower mount connection, and a stainless steel case. Liquid fill dampens pointer vibration and protects internal components from moisture and corrosive atmospheres, extending service life in high-vibration or pulsating pressure environments. Licensed plumbers, pipefitters, HVAC technicians, and industrial maintenance professionals install this gauge type on pumps, compressors, boilers, filtration systems, and hydraulic lines.\u003c\/p\u003e\n\u003cp\u003eThis gauge is suited for residential and light commercial plumbing systems, HVAC hydronic loops, compressed air lines, and general industrial process piping where a bottom-entry connection is required. The lower mount orientation allows flush or panel mounting and keeps the dial face fully visible when installed on vertical pipe runs or equipment panels. The 200 psi range covers common water, air, and fluid pressure monitoring needs in typical mechanical room and process environments.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e200 psi pressure range for general industrial and mechanical system monitoring\u003c\/li\u003e\n  \u003cli\u003e2.5 inch dial face for clear at-a-glance readings\u003c\/li\u003e\n  \u003cli\u003e0.25 inch MPT lower mount connection for vertical pipe and panel installations\u003c\/li\u003e\n  \u003cli\u003eLiquid filled internals dampen vibration and protect against pulsation-related wear\u003c\/li\u003e\n  \u003cli\u003eStainless steel case resists corrosion in wet, humid, or mildly aggressive environments\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or new-installation pressure gauge suitable for industrial process piping, HVAC hydronic systems, compressed air distribution, and pump or compressor monitoring applications requiring a 0.25 inch MPT lower mount connection.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is typically performed by a licensed plumber, pipefitter, or HVAC technician. Shut off and depressurize the system completely before removing or installing any pressure gauge. Apply thread sealant or PTFE tape to male pipe threads per applicable plumbing codes before threading the gauge into the port. Do not over-tighten; use a wrench on the hex fitting body only, never on the case, to avoid damaging internal components.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePressure Range\u003c\/strong\u003e: 0 to 200 psi\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDial Size\u003c\/strong\u003e: 2.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConnection Size\u003c\/strong\u003e: 0.25 inches MPT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMount Type\u003c\/strong\u003e: Lower Mount\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFill Type\u003c\/strong\u003e: Liquid Filled\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCase Material\u003c\/strong\u003e: Stainless Steel\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: DWYER INSTRUMENTS\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: lf251-200-4l\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DWYER INSTRUMENTS","offers":[{"title":"Default Title","offer_id":51233941487922,"sku":"LF251-200-4L","price":40.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/307632739.png?v=1780112720","url":"https:\/\/voomisupply.com\/products\/dwyer-instruments-lf251-200-4l-200-psi-pressure-gauge-2-5-in-dial","provider":"Voomi Supply","version":"1.0","type":"link"}