{"product_id":"dwyer-1211-12-slack-tube-manometer-50-psi-max","title":"Dwyer 1211-12 Slack Tube Manometer 50 Psi Max","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe DWYER 1211-12 is a slack tube manometer designed for measuring low-pressure differentials in HVAC, plumbing, and mechanical system applications. It reads across a range of -6 to 6 inches water column and is rated for a maximum of 50 psi. The plastic body and case construction keep the instrument lightweight at 1.8125 pounds, making it easy to carry on service calls. HVAC technicians and mechanical contractors use this instrument to verify airflow, check static pressure, and balance duct systems. The 20.75-inch overall height and sloped tube design allow for clear, accurate readings without additional tools.\u003c\/p\u003e\n\u003cp\u003eThis manometer is well-suited for residential and light commercial HVAC service work, including air balancing, filter pressure drop checks, and combustion air verification. The -6 to 6 inch water column measurement range covers the low-pressure differentials typical in duct systems, furnace heat exchangers, and ventilation equipment. A maximum operating temperature of 130 degrees F makes it appropriate for environments near warm air equipment. Technicians typically use it alongside a pitot tube or pressure probe to take inline readings at test ports or duct taps.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eMeasurement range of -6 to 6 inches water column for low-pressure differential readings\u003c\/li\u003e\n  \u003cli\u003e50 psi maximum rated pressure for safe connection to pressurized systems\u003c\/li\u003e\n  \u003cli\u003e130 degrees F maximum operating temperature suits warm-air HVAC environments\u003c\/li\u003e\n  \u003cli\u003ePlastic body and case construction reduce weight for field portability\u003c\/li\u003e\n  \u003cli\u003e0.13-inch connection size compatible with standard pressure tubing and fittings\u003c\/li\u003e\n  \u003cli\u003eCompact 2.17-inch width fits easily in a tool bag or service kit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style field instrument for use with residential and light commercial HVAC duct systems, air handlers, and ventilation equipment requiring low-pressure differential measurement in the inch water column range.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis instrument is typically installed and used by licensed HVAC technicians performing system commissioning, air balancing, or diagnostic work. Before connecting, ensure the system is at a stable operating condition and that connection ports are de-pressurized or within the rated pressure range of the instrument. Use appropriate tubing rated for the system pressure and temperature. Do not exceed the 50 psi maximum pressure rating or the 130 degrees F temperature limit, as doing so may damage the plastic housing or cause inaccurate readings.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMeasurement Range\u003c\/strong\u003e: -6 to 6 inches water column\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Pressure\u003c\/strong\u003e: 50 psi\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Temperature\u003c\/strong\u003e: 130 degrees F\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConnection Size\u003c\/strong\u003e: 0.13 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Height\u003c\/strong\u003e: 20.75 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Width\u003c\/strong\u003e: 2.17 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBody Material\u003c\/strong\u003e: Plastic\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCase Material\u003c\/strong\u003e: Plastic\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1.8125 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: DWYER\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 1211-12\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DWYER","offers":[{"title":"Default Title","offer_id":51540717666610,"sku":"1211-12","price":218.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/bb07515e3ec3607d74f7562e646e8dbb.jpg?v=1785862821","url":"https:\/\/voomisupply.com\/products\/dwyer-1211-12-slack-tube-manometer-50-psi-max","provider":"Voomi Supply","version":"1.0","type":"link"}