{"product_id":"l4079b1041-honeywell-pressuretrol-high-limit-pressure-controller-10-150-psi","title":"L4079B1041 | Honeywell PressureTrol® High-Limit Pressure Controller 10–150 psi","description":"\u003ch4\u003eDescription \u003c\/h4\u003e\n\u003cp data-start=\"144\" data-end=\"396\"\u003eThe Honeywell L4079B1041 is a high-pressure limit controller (PressureTrol®) offering manual reset functionality to protect systems from overpressure. It is suitable for steam, air, noncombustible gases, and non-corrosive fluids, and is designed to open a circuit via a snap-acting microswitch when pressure exceeds a preset threshold. Its robust stainless steel diaphragm and multiple mounting options ensure dependable protection in industrial environments.\u003c\/p\u003e\n\u003cp data-start=\"284\" data-end=\"574\" class=\"\"\u003e \u003c\/p\u003e\n\u003cp data-start=\"284\" data-end=\"574\" class=\"\"\u003e \u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications \u003c\/h4\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNew\/Never Used Surplus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHoneywell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eControls \u0026amp; Indicators\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eL4079B1041\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSubcategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePressure Control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSwitch Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSPST (single pole, single throw)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSwitch Action\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBreak on pressure rise\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eReset Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eManual Reset\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Pressure Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10 to 150 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaximum Pressure\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e225 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDiaphragm Material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eElectrical Connections\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eScrew Terminals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMounting Options\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e¼″ NPT diaphragm port or surface mount through back\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTrip-Free Mechanism\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVibration Resistance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eModerate vibration immunity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAmbient Temperature Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUp to 150 °F (66 °C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMedia Compatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSteam, air, non-combustible gases, non-corrosive fluids\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHousing Material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLikely metal or rugged enclosure (industrial grade)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eContact Voltage Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTypically rated for 120\/240 Vac (standard control)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2.10 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eInformation About \u003cspan data-sheets-root=\"1\"\u003eL4079B1041\u003c\/span\u003e\n\u003c\/h4\u003e\n\u003cp\u003eThe L4079B1041 is part of Honeywell’s L4079 series of PressureTrol® limit controllers, intended to function as safety or high-limit devices in pressure systems. It uses a stainless steel diaphragm as the sensing element, making it compatible with steam, gases, and fluids that do not corrode stainless steel. When system pressure rises beyond the set point, the internal SPST microswitch snaps open, interrupting the circuit; the switch must then be manually reset to resume operations. It mounts via a ¼″ NPT female diaphragm connection or through the back of the case, providing flexibility in panel or inline installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eManual Reset Limit: Once triggered by excessive pressure, the switch must be manually reset, preventing automatic reactivation after a fault.\u003c\/li\u003e\n\u003cli\u003eSPST Break-on-Rise Switch: The internal microswitch opens the circuit when pressure increases past the set point, ensuring fail-safe control.\u003c\/li\u003e\n\u003cli\u003eStainless Steel Diaphragm: Designed for contact with steam, air, noncombustible gases, or noncorrosive fluids, resisting degradation in harsh environments.\u003c\/li\u003e\n\u003cli\u003ePreset Pressure Range: Factory range of 10 to 150 psi, with the capability to handle maximum pressures up to 225 psi.\u003c\/li\u003e\n\u003cli\u003eVersatile Mounting: Can be installed via ¼″ NPT female diaphragm port or surface-mounted through the back of the housing.\u003c\/li\u003e\n\u003cli\u003eReset-Free Design: Its trip-free mechanism ensures the switch cannot be held closed (defeating the limit function) by force.\u003c\/li\u003e\n\u003cli\u003eVibration-Resistant: The internal mechanism is designed to resist moderate vibration without false tripping or malfunction.\u003c\/li\u003e\n\u003cli\u003eSimple Electrical Interface: Screw terminal connections allow straightforward wiring for control circuits.\u003c\/li\u003e\n\u003cli\u003eLow-Temperature Capability: Rated for service in ambient conditions where the maximum temperature is 150 °F (≈ 66 °C).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe L4079B1041 delivers dependable overpressure protection for HVAC, boiler, compressor, and general process control systems.\u003c\/p\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":49105137991936,"sku":"L4079B1041","price":689.43,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0388\/5331\/2557\/files\/honeywell-l4079b1041-pressuretrol-limit-controller.jpg?v=1785541081","url":"https:\/\/alotechparts.com\/products\/l4079b1041-honeywell-pressuretrol-high-limit-pressure-controller-10-150-psi","provider":"Alo Tech Solutions","version":"1.0","type":"link"}