{"product_id":"mcdonnell-miller-153827-pse-801-120-probe-type-low-water-cut-off-control","title":"McDonnell \u0026 Miller 153827 PSE-801-120 Probe-Type Low Water Cut-Off Control","description":"\u003cp\u003eProtect your hydronic heating system from dry-firing damage with the \u003cstrong\u003eMcDonnell \u0026amp; Miller 153827\u003c\/strong\u003e, also known as the \u003cstrong\u003ePSE-801-120\u003c\/strong\u003e probe-type low water cut-off. This control is engineered to provide precise monitoring of boiler water levels, ensuring that heating elements or burners are automatically de-energized if water drops below a critical safety threshold. Its rugged construction makes it a dependable choice for maintaining long-term equipment integrity in both commercial and residential boiler installations.\u003c\/p\u003e\u003cp\u003eThe unit functions by utilizing a conductive probe sensor that completes an electrical circuit through the boiler water. When the water level recedes and contact with the probe is lost, the control board detects the change in resistance and instantly interrupts the burner circuit. This electronic sensing technology provides a rapid response time compared to traditional float-based designs, reducing mechanical wear and enhancing operational safety.\u003c\/p\u003e\u003ch4\u003eKey System Performance Baselines:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety Integration:\u003c\/strong\u003e Designed for reliable burner circuit interruption during low-water events.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolid-State Design:\u003c\/strong\u003e Utilizes advanced circuitry for rapid, accurate level detection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for seamless integration with compatible hydronic boiler systems.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e⚠️ \u003cstrong\u003eApplication Profile:\u003c\/strong\u003e Ideal for steam and hot water boilers requiring advanced electronic level monitoring, HVAC boiler safety retrofits, and preventative maintenance programs where mechanical failure must be avoided.\u003c\/p\u003e","brand":"McDonnell \u0026 Miller","offers":[{"title":"Default Title","offer_id":43125839462494,"sku":"153827","price":324.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/7151\/8558\/files\/153827_image_2c66cf82-d802-4502-9ab6-c3d4f8f19285.png?v=1786039271","url":"https:\/\/nationalboilersupply.com\/products\/mcdonnell-miller-153827-pse-801-120-probe-type-low-water-cut-off-control","provider":"National Boiler Supply","version":"1.0","type":"link"}