BASO K16RA-48 Thermocouple

The BASO K16RA-48 is a professional-grade, nickel-plated thermocouple engineered for high-performance standing pilot ignition systems. As a veteran-preferred component in the Husky series, this 48-inch lead is designed to provide a stable 25-35 mV open circuit output, ensuring reliable flame sensing and millivolt signal transmission to your gas control valve. The nickel plating provides superior resistance to oxidation and corrosion, making it the ideal choice for demanding environments where standard copper leads may fail prematurely. This model is technically identical to the K16RA-48H, maintaining full compatibility with BASO pilot burners and numerous OEM applications.

For the field technician, the K16RA-48 offers a standard 11/32-32 male nut technical connection, allowing for a seamless thermocouple replacement in residential and commercial boilers, furnaces, and water heaters. With a maximum hot junction temperature rating of 1500°F, it handles the intense thermal stress of localized pilot flames while maintaining consistent electrical resistance. Whether you are servicing a legacy system or performing routine maintenance, this heavy-duty thermocouple ensures the safety circuit remains energized and responsive, preventing nuisance shutdowns caused by weak millivolt signals.

• Corrosion Resistance: Heavy-duty nickel plating protects the copper tubing from high-temperature oxidation and harsh combustion environments.
• High Millivolt Output: Delivers a consistent 25-35 mV range to ensure the electromagnetic power unit in the gas valve stays securely engaged.
• Extended Reach: The 48-inch length provides ample lead for routing through complex heat exchangers while avoiding high-heat zones.
• Universal Compatibility: Directly replaces BASO 17D, 50, 58D, 87D, 88D, 97D, 107D, and K15DA series components.
• Thermal Durability: Rated for hot junction temperatures up to 1500°F (816°C) for reliable operation in intense pilot flames.

Is the K16RA-48 compatible with non-BASO gas valves?
Yes, while optimized for BASO brand automatic pilot controls, this standard thread-in thermocouple is interchangeable with most major manufacturers that utilize a 25–35 mV standing pilot system and an 11/32-32 connection.

What causes a thermocouple to drop below the 25-35 mV range?
Common issues include improper tip placement (should be 0.5 inches in the flame), soot buildup on the nickel-plated junction, or excessive electrical resistance caused by sharp kinks in the 48-inch lead.

Can I use a K16RA-48 to replace a shorter K16RA-24?
Technically yes, provided you safely coil the excess lead away from the main burner heat. However, always aim for the shortest lead possible to minimize voltage drop across the length of the wire.

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.