{"product_id":"mcdonnell-miller-354081-pa-800-probe-assembly","title":"McDonnell \u0026 Miller 354081 PA-800 Probe Assembly","description":"\u003cp\u003eMaintain precise liquid level monitoring in your hydronic system with the \u003cstrong\u003eMcDonnell \u0026amp; Miller 354081\u003c\/strong\u003e, also known as the \u003cstrong\u003ePA-800\u003c\/strong\u003e probe assembly. This component is engineered to serve as a critical sensor for low water cutoff controls, ensuring that your boiler equipment operates within safe parameters by detecting probe contact with water.\u003c\/p\u003e\u003cp\u003eThe probe functions as a conductive sensing element that completes an electrical circuit when submerged in water. As the water level drops and contact is broken, the control unit interprets this signal change to interrupt the burner circuit, providing reliable protection against dry-firing and potential heat exchanger damage.\u003c\/p\u003e\u003ch4\u003eKey System Performance Baselines:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable Construction:\u003c\/strong\u003e Engineered to withstand harsh internal boiler environments for long-term reliability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecise Conductivity:\u003c\/strong\u003e Designed to maintain signal integrity for accurate low water cutoff switching.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeamless Integration:\u003c\/strong\u003e Optimized for use with compatible McDonnell \u0026amp; Miller control systems for simplified maintenance.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e⚠️ \u003cstrong\u003eApplication Profile:\u003c\/strong\u003e Recommended for use in commercial and residential steam or hot water boiler low water cutoff assemblies, particularly where frequent cycling or sediment exposure is a factor.\u003c\/p\u003e","brand":"McDonnell \u0026 Miller","offers":[{"title":"Default Title","offer_id":43128519688286,"sku":"354081","price":114.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/7151\/8558\/files\/354081_image_bd9ceaf5-7c92-4082-82c8-6a7d8b85f666.jpg?v=1786066443","url":"https:\/\/nationalboilersupply.com\/products\/mcdonnell-miller-354081-pa-800-probe-assembly","provider":"National Boiler Supply","version":"1.0","type":"link"}