Robertshaw 1950-018 Thermopile

The Robertshaw 1950-018 Thermopile is a heavy-duty millivolt generator designed for self-powered gas control systems in commercial and residential heating applications. Built for technicians who need a reliable 2-lead pilot generator, this unit features a 18-inch lead length with spade connectors to ensure a secure interface with the gas valve. The assembly utilizes high-grade copper and nickel alloys to maximize thermal-to-electrical energy conversion, consistently producing the 250mV to 750mV range required to hold the electromagnetic coil open in a millivolt gas valve.

This Robertshaw 1950 series (also known as the TP-75) is engineered with a stainless steel outer jacket to resist heat blistering and oxidation in high-temperature combustion chambers. For versatile field installation, it includes the PG9 adapter and a threaded mounting nut, making it a compatible replacement thermopile for various standing pilot systems and equipment from brands like Frymaster, Pitco, and Honeywell. The inclusion of a mica washer prevents electrical shorting, ensuring consistent flame sensing and safety circuit integrity.

• Broad Compatibility: Serves as a direct millivolt system replacement for Robertshaw TP-75 and competitive 2-lead models.
• Enhanced Durability: The stainless steel jacket protects internal thermocouple junctions from premature degradation in harsh pilot flames.
• Reliable Connectivity: 18-inch leads with pre-installed spade connectors simplify wiring in tight burner compartments.
• Optimized Output: Designed to maintain high millivolt output for rapid gas valve actuation and stable operation.
• Complete Kit: Ships with a PG9 pilot adapter to allow for seamless integration into various pilot burner brackets.

What is the difference between a thermocouple and this 1950-018 thermopile?
A thermocouple generally powers the safety magnet in the valve to keep the pilot lit, while this thermopile generator creates a higher voltage (up to 750mV) to operate the main gas valve on self-powered systems.

Will this work on my fireplace or fryer if I currently have a coaxial connection?
No, the 1950-018 is a two-lead spade connector model. For coaxial applications, you would typically require the Robertshaw 1951 series (CP-2).

Why is my new thermopile not opening the gas valve?
Check for carbon buildup on the pilot burner or ensure the pilot flame is fully engulfing the top 1/2 to 2/3 of the thermopile tip. Use a multimeter to verify a closed-circuit millivolt reading of at least 250mV.

Disclaimer: 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.