{"product_id":"robertshaw-1951-001-thermopile","title":"Robertshaw 1951-001 Thermopile","description":"\u003cp\u003eThe \u003cstrong\u003eRobertshaw 1951-001 Thermopile\u003c\/strong\u003e is a heavy-duty, coaxial pilot generator engineered for high-performance self-powered gas control systems. Featuring a \u003cstrong\u003e36-inch lead length\u003c\/strong\u003e and a durable stainless steel outer jacket, this \u003cstrong\u003eRobertshaw CP-2 thermopile\u003c\/strong\u003e is designed to withstand intense heat and resist blistering in demanding commercial and residential environments. The assembly utilizes a specialized combination of copper and nickel alloys to maximize electrical conductivity, reliably delivering an \u003cstrong\u003eopen circuit output of 500 to 750 millivolts\u003c\/strong\u003e. This \u003cstrong\u003emillivolt gas valve sensor\u003c\/strong\u003e includes an integrated mica washer to provide superior insulation and prevent shorting under high-stress conditions.\u003c\/p\u003e\n\n\u003cp\u003eInstallation is streamlined via the \u003cstrong\u003eattached threaded nut\u003c\/strong\u003e, ensuring a secure and vibration-resistant fit into the burner assembly. This model specifically includes the \u003cstrong\u003ePG9 pilot adapter\u003c\/strong\u003e, making it a direct \u003cstrong\u003ereplacement thermopile\u003c\/strong\u003e for General Controls PG9 pilot burners. For field technicians, the coaxial connector nut (3\/8”-32 UNEF-2) ensures a solid mechanical and electrical bond to the gas valve, maintaining system integrity and preventing nuisance drop-outs.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversal Compatibility:\u003c\/strong\u003e Designed as a direct service replacement for Robertshaw, Uni-Line, and competitive coaxial-type self-powered systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Durability:\u003c\/strong\u003e The \u003cstrong\u003e36-inch stainless steel jacket\u003c\/strong\u003e provides superior protection against flame impingement and thermal cycling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Conductivity:\u003c\/strong\u003e Nickel-copper alloy construction ensures consistent millivolt generation for reliable valve holding.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Fit:\u003c\/strong\u003e Included \u003cstrong\u003ePG9 adapter\u003c\/strong\u003e and threaded nut simplify retrofitting on older pilot assemblies.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I test if the thermopile is failing?\u003c\/strong\u003e\u003cbr\u003e\nUsing a multimeter set to millivolts, measure the open circuit output; it should read between 500mV and 750mV. If the reading drops significantly under load when the valve is energized, the internal resistance is likely too high, indicating a need for replacement.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat is the difference between this and a 1950 series?\u003c\/strong\u003e\u003cbr\u003e\nThe 1951 series (CP-2) utilizes a coaxial \"plug-in\" style connector with a threaded nut, whereas the 1950 series (TP-75) typically uses two-wire spade terminals. Always verify your valve’s input type before installation.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhy is the PG9 adapter included?\u003c\/strong\u003e\u003cbr\u003e\nThe \u003cstrong\u003ePG9ad adapter\u003c\/strong\u003e is required specifically for legacy General Controls pilot burners. It allows the threaded 1951-001 to seat correctly at the proper height relative to the pilot flame ring.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong style=\"color: red;\"\u003eThis item is not eligible for free shipping.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Robertshaw","offers":[{"title":"Default Title","offer_id":35646083404,"sku":"1951-001","price":83.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/Image_d119fa94-1a88-425a-8d36-b8846c6b1b90.png?v=1791758960","url":"https:\/\/www.gsistore.com\/en-ca\/products\/robertshaw-1951-001-thermopile","provider":"GSIstore","version":"1.0","type":"link"}