Robertshaw 1950-001 Thermopile

As a seasoned technician, you know that a reliable standing pilot is the backbone of any millivolt system. The Robertshaw 1950-001 Thermopile, often referred to as a TP-75 pilot generator, is the industrial standard for self-powered gas control systems. This 36-inch, 2-lead thermopile is engineered to generate a consistent 250mV to 750mV output, providing the necessary DC voltage to operate millivolt gas valves without external power. Constructed with a stainless steel outer jacket, it resists heat blistering and oxidation in high-temperature combustion chambers. The inclusion of a PG9 adapter and mounting nut ensures it drops into most pilot burner assemblies, including those from Honeywell, White-Rodgers, and SIT, making it a critical universal replacement part for your service truck. Whether you are surfacing a gas fireplace, wall furnace, or commercial boiler, this 750 millivolt generator provides the high electrical conductivity and circuit integrity required to prevent nuisance drop-outs and ensure main burner ignition upon a call for heat.

Key Benefits for the Jobsite:

• Universal Compatibility: Direct replacement for Honeywell Q313A, White-Rodgers G01A, and original Robertshaw 21432 series.
• Rugged Construction: Stainless steel sheath and mica washers provide superior insulation and protection against shorting in gas-fired appliances.
• High Output Performance: Delivers up to 750 millivolts, ensuring robust signal strength for older or high-impedance millivolt control valves.
• Easy Installation: Features two-wire spade connectors and an included PG9 adapter for rapid fitment in standing pilot assemblies.
• Reliable Safety: Quickly detects pilot flame loss to facilitate immediate gas shut-off through the safety control circuit.

Common Contractor Questions:

How do I test the Robertshaw 1950-001 with a multimeter?
Set your meter to DC millivolts. An open-circuit test should show 500mV to 750mV when the pilot flame is impinging on the top 3/8" of the tip. Under load (connected to the valve), it should maintain at least 250mV to keep the operator coil energized.

Will this replace a coaxial-style thermopile?
No, this is a 2-lead spade connector model. If your current system uses a single screw-in coaxial connection at the valve, you need the 1951 Series (CP-2).

What causes a thermopile to fail prematurely?
Typically, excessive flame impingement or "sooting" from a dirty pilot orifice can cause the stainless steel jacket to degrade, lead to internal resistance, and ultimately drop the millivolt output below the valve's hold-in threshold.

Safety Information:
California Proposition 65 Warning: This product contains materials known to the State of California to cause cancer and/or reproductive harm.

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.