{"product_id":"dwyer-3005mr-photohelic-pressure-switch-25-psi","title":"Dwyer 3005MR Photohelic Pressure Switch 25 Psi","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe DWYER 3005MR is a Photohelic pressure switch designed for monitoring and control applications where differential or gauge pressure measurement is required alongside switch action. Rated to a maximum of 25 psi with 2% accuracy, this unit combines a visual analog dial with integrated switching capability in a single compact instrument. The 4-inch dial face is housed in a polycarbonate plastic body, making it suitable for light industrial and HVAC environments. The unit weighs 1.625 pounds and connects via a 1\/8-inch FNPT back or side port. Includes 8-inch cable assemblies for electrical connections. Licensed HVAC technicians and instrumentation technicians are the primary installers.\u003c\/p\u003e\n\u003cp\u003eThe 3005MR is used in HVAC systems, cleanrooms, filter monitoring, and general industrial pressure monitoring where both a visual gauge reading and an electrical switching output are needed at the same tap point. Its surface-mount configuration allows installation on panels, ductwork, or enclosures. The 5-inch water column range reference and a minimum vacuum rating of -20 inches Hg make it appropriate for low-differential-pressure monitoring typical of air handling and ventilation systems. The 120 degrees F maximum temperature rating suits most indoor mechanical and air-side applications.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e25 psi maximum pressure rating with 2% accuracy\u003c\/li\u003e\n  \u003cli\u003e4-inch dial face for easy on-site visual readings\u003c\/li\u003e\n  \u003cli\u003e1\/8-inch FNPT connection, back and side entry options\u003c\/li\u003e\n  \u003cli\u003eSurface-mount design for panel or ductwork installation\u003c\/li\u003e\n  \u003cli\u003ePolycarbonate plastic body construction\u003c\/li\u003e\n  \u003cli\u003eIncludes 8-inch cable assemblies for electrical connections\u003c\/li\u003e\n  \u003cli\u003eCE listed\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or upgrade instrument for residential and light commercial HVAC, ventilation, and industrial pressure monitoring applications requiring a combined gauge and pressure switch function.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is typically performed by a licensed HVAC technician or instrumentation technician. De-energize the system and isolate the pressure source before making any connections. Use appropriate thread sealant on the 1\/8-inch FNPT fitting and do not overtighten the polycarbonate housing. Electrical connections should comply with applicable NEC requirements for the installation environment.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Pressure\u003c\/strong\u003e: 25 psi\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAccuracy\u003c\/strong\u003e: 2%\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Temperature\u003c\/strong\u003e: 120 degrees F\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMinimum Vacuum\u003c\/strong\u003e: -20 inches Hg\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConnection Type\u003c\/strong\u003e: FNPT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/8 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConnection Location\u003c\/strong\u003e: Back and Side\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDial Size\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Width\u003c\/strong\u003e: 2.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBody Material\u003c\/strong\u003e: Polycarbonate Plastic\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIncludes\u003c\/strong\u003e: 8-inch cable assemblies for electrical connections\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1.625 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: CE\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: 3005MR\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DWYER","offers":[{"title":"Default Title","offer_id":51541041774898,"sku":"3005MR","price":891.52,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/81d2e720ae827cf8166e188a5d572655_79311871-b03d-47a8-8293-9254d1c30757.jpg?v=1785867717","url":"https:\/\/voomisupply.com\/products\/dwyer-3005mr-photohelic-pressure-switch-25-psi","provider":"Voomi Supply","version":"1.0","type":"link"}