{"product_id":"ametek-256151-pressure-gauge-30-0-30-psi-2-5-in-dial","title":"Ametek 256151 Pressure Gauge 30-0-30 Psi 2.5 in Dial","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe AMETEK 256151 is an analog pressure gauge designed for monitoring both positive and negative pressure (compound measurement) in mechanical systems. It features a 2.5-inch dial face with a 30-0-30 psi range, allowing technicians to read vacuum and pressure on a single instrument. The lower-mount 1\/4-inch threaded connection makes inline and panel installation straightforward. Accuracy is rated at 1.6 percent of scale, which meets general-purpose requirements for HVAC, plumbing, and refrigeration service work. This gauge is not liquid-filled, making it suitable for clean, low-vibration service environments.\u003c\/p\u003e\n\u003cp\u003eThis gauge is used in residential and light commercial applications where compound pressure readings are needed — for example, verifying system pressures on pumps, compressors, or distribution manifolds. It is well-suited for HVAC technicians, plumbers, and mechanical service professionals working with systems that may operate in both vacuum and positive pressure conditions. The lower-mount connection allows direct installation on pipe fittings, valve bodies, or test ports with standard 1\/4-inch NPT or BSP threads.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eCompound 30-0-30 psi range reads both vacuum and positive pressure on one dial\u003c\/li\u003e\n  \u003cli\u003e2.5-inch analog dial face for clear, at-a-glance readings\u003c\/li\u003e\n  \u003cli\u003e1.6 percent of scale accuracy for reliable general-purpose measurement\u003c\/li\u003e\n  \u003cli\u003eLower-mount connection simplifies direct pipe or valve body installation\u003c\/li\u003e\n  \u003cli\u003eDry (non-liquid-filled) construction suited for clean, low-vibration environments\u003c\/li\u003e\n  \u003cli\u003eCompact 1\/4-inch threaded entry fits standard service ports and manifold fittings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or service-grade gauge for residential and light commercial mechanical systems requiring compound pressure monitoring via a lower-mount 1\/4-inch threaded connection.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is typically performed by licensed HVAC technicians or plumbers. Isolate and depressurize the system fully before removing or installing any pressure gauge. Apply appropriate thread sealant to the 1\/4-inch threaded fitting and tighten by hand before using a wrench — avoid over-torquing, which can crack the gauge body or distort the connection. Verify the system pressure range falls within the 30-0-30 psi gauge range before placing the system back in service.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePressure Range\u003c\/strong\u003e: 30-0-30 psi (compound)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAccuracy\u003c\/strong\u003e: 1.6 percent of 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: 2.5 inches (63 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMount Type\u003c\/strong\u003e: Lower\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/4 inch\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: 0.4 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAMETEK Model Number\u003c\/strong\u003e: 6562\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: AMETEK\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 256151\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"AMETEK","offers":[{"title":"Default Title","offer_id":51544668995890,"sku":"256151","price":117.86,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/aa6aeaa5b3e6889cc8c2d54dff8442eb.jpg?v=1785933115","url":"https:\/\/voomisupply.com\/products\/ametek-256151-pressure-gauge-30-0-30-psi-2-5-in-dial","provider":"Voomi Supply","version":"1.0","type":"link"}