BASO K19AT-48 Thermocouple

When you are in the field dealing with a dropped-out standing pilot, the BASO K19AT-48 Thermocouple is the high-reliability Super Slim Jim universal replacement you need on the truck. Engineered for versatility, this 48-inch HVAC universal thermocouple provides a stable 25-35 mV open circuit range, ensuring the millivolt signal is strong enough to keep the standing pilot ignition system safety valve held open without nuisance shutoffs. This specific model is an exact functional match for the BASO K19AT-48H, featuring the same standard 11/32-32 male nut connector that technicians expect for seamless integration.

Built with a high-performance inner and outer element, the K19AT-48 is designed to withstand a maximum hot junction temperature of 1300°F (704°C). The "Super Slim Jim" profile allows it to fit into tight pilot burner assemblies where bulkier leads fail. Each unit includes a spring clip and a hardware kit for rapid adaptation to various bracket styles. For contractors looking to simplify inventory, this replacement thermocouple serves as a drop-in 11/32" connection for most residential and light commercial gas valves requiring a steady thermoelectric output.

• Extreme Compatibility: Designed as a universal thermocouple replacement for Honeywell Q337, Robertshaw T26, and Johnson Controls K19AA/BA/CA series.
• Durable Construction: High-grade element materials prevent premature burnout in high-heat standing pilot ignition systems.
• Standard Fitting: Equipped with a knurled 11/32-32 DL male nut for a tool-secure connection to the power unit.
• Extended Reach: The 48-inch lead length provides flexibility for larger boiler or furnace cabinets where the pilot is recessed.

Is the BASO K19AT-48 compatible with standard gas valves?
Yes, the 11/32-32 connection is the industry standard for most thermoelectric gas valves. It is a direct fit for BASO, Honeywell, and Robertshaw valves that use a threaded thermocouple port.

What is the difference between the K19AT-48 and K19AT-48H?
These parts are functionally identical. The 'H' suffix generally denotes a specific packaging or hanger-tag style for retail display, but the technical specifications and performance are the same.

How deep should this thermocouple sit in the pilot flame?
For optimal 25-35 mV range performance, the top 3/8" to 1/2" of the tip should be immersed in the pilot flame to maintain the proper temperature differential between the hot and cold junctions.

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.