BASO K16FA-24 Thermocouple

For service technicians maintaining standing pilot ignition systems, the BASO K16FA-24 Thermocouple is a field-proven solution designed for precise flame sensing and safety circuit integration. This 24-inch heavy-duty thermocouple with junction block provides a standard 25-35 mV open circuit range, ensuring consistent millivolt output to power units. The integrated junction lead, measuring 3.546 inches, allows for the effortless series connection of high limit switches or spill switches, a critical requirement for modern gas-fired appliance safety. Engineering-wise, the K16FA-24 is identical to the K16FA-24H, serving as a direct OEM replacement for a variety of BASO and Johnson Controls applications. Its 11/32-32 male nut connector and standard thread-in design facilitate rapid installation in commercial cooking equipment, catalytic heaters, and residential furnaces. By accurately monitoring the pilot flame, this HVAC flame sensor prevents the main gas valve from opening during flame failure, protecting the system from hazardous gas accumulation. Professionals often choose this model for its ability to replace legacy series like the 17D, 50, and K15DA.

Key Benefits

• Universal Compatibility: Interchanges seamlessly with K16FA-24H and replaces older 17D, 58D, and 97D series components.
• Enhanced Safety: Built-in junction block enables the integration of ECO (Energy Cut-Off) or limit switches directly into the pilot circuit.
• Robust Construction: Designed to withstand maximum hot junction temperatures up to 1500°F (816°C) for industrial-grade durability.
• Reliable Output: Maintains a high-performance 25-35 mV signal to ensure the electromagnetic power unit remains held open during operation.
• Standardized Fit: Features a 24-inch lead and 11/32-32 thread for compatibility with most BASO pilot burners and thermoelectric valves.

Common Questions

How do I test the millivolt output on a BASO K16FA-24?
Using a multimeter set to the DC millivolt scale, measure across the junction block terminals while the pilot is lit. You should see a stable reading within the 25-35 mV range. If the reading is below 20 mV under load, the thermocouple or pilot flame adjustment may need service.

Can I use this thermocouple with a high limit switch?
Yes, the K16FA series is specifically designed for this. The junction block allows you to wire a limit switch in series with the thermocouple and power unit, providing an automatic safety shutoff if an over-temperature condition occurs.

What is the difference between the K16FA-24 and the K16FA-24H?
There is no functional difference. Both models share the same technical specifications, junction lead length, and voltage output, making them completely interchangeable for field replacements.

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.