{"product_id":"ashcroft-82140-pressure-gauge-3-5-in-dial-npt-center-back","title":"Ashcroft 82140 Pressure Gauge 3.5 in Dial Npt Center Back","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ASHCROFT 82140 is an analog pressure gauge designed for measuring both positive pressure and vacuum in a single instrument. With a 3.5-inch dial and a pressure range of -30 inches Hg to 150 psi, it covers compound measurement applications common in HVAC, plumbing, and industrial service work. The stainless steel case provides durability in demanding environments. A 1\/4-inch NPT center back mount connection allows direct installation into threaded ports on equipment and piping. Accuracy is rated at 1 percent of full scale. This gauge is non-liquid-filled and suited for stable, low-vibration installations.\u003c\/p\u003e\n\u003cp\u003eThis gauge is used in residential and commercial applications where technicians need to monitor both vacuum and positive pressure from a single instrument. Typical scenarios include refrigeration evacuation verification, HVAC system pressure checks, plumbing pressure testing, and general mechanical service where a compact, panel-ready gauge is required. The center back mount configuration keeps the dial face flush and readable when mounted to panels or manifolds.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eCompound range from -30 inches Hg vacuum to 150 psi positive pressure on a single dial\u003c\/li\u003e\n  \u003cli\u003e3.5-inch analog dial for clear, at-a-glance reading during service\u003c\/li\u003e\n  \u003cli\u003eStainless steel case construction for corrosion resistance in field conditions\u003c\/li\u003e\n  \u003cli\u003e1\/4-inch NPT center back mount for direct in-line or panel installation\u003c\/li\u003e\n  \u003cli\u003e1 percent of scale accuracy for reliable readings across the full range\u003c\/li\u003e\n  \u003cli\u003eNon-liquid-filled design suited for low-vibration service environments\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a direct-fit replacement or upgrade for standard 3.5-inch dial compound pressure gauges with 1\/4-inch NPT center back mount connections in HVAC, plumbing, and mechanical system applications.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a licensed HVAC technician or plumber in accordance with applicable codes. Shut down and depressurize the system fully before removing or installing the gauge. Apply thread sealant appropriate for the service medium to the NPT threads, and avoid over-tightening to prevent case or fitting damage. Non-liquid-filled gauges should be installed in locations with minimal vibration to maintain accuracy and service life.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePressure Range\u003c\/strong\u003e: -30 inches Hg to 150 psi\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAccuracy\u003c\/strong\u003e: 1 percent of full scale\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDial Type\u003c\/strong\u003e: Analog\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDial Diameter\u003c\/strong\u003e: 3.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/4 inch NPT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMount Type\u003c\/strong\u003e: Center Back\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCase Material\u003c\/strong\u003e: Stainless Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLiquid Filled\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1.2 pounds\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: ASHCROFT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 82140\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ASHCROFT","offers":[{"title":"Default Title","offer_id":51544483529010,"sku":"82140","price":239.07,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/354cb3162489ff68ea41d248e4d39263_67c5c9a8-4535-4bab-a899-95036b5dd4c0.jpg?v=1785927655","url":"https:\/\/voomisupply.com\/products\/ashcroft-82140-pressure-gauge-3-5-in-dial-npt-center-back","provider":"Voomi Supply","version":"1.0","type":"link"}