BASO K19AT-72 Thermocouple

Maintaining a reliable standing pilot ignition system requires components that can withstand constant thermal stress while delivering precise millivolt output. The BASO K19AT-72 is a heavy-duty, Super Slim Jim universal replacement thermocouple specifically engineered for high-performance gas valves, including Series G and H BASO models, Basoids, and Basotrols. This 72-inch thermocouple provides the necessary reach for large industrial boilers and furnaces while maintaining a stable 25-35 mV open circuit range. Its ultra-slim profile and included spring clip and lead adapters ensure seamless thermocouple compatibility with various pilot burner assemblies from manufacturers like Honeywell and Robertshaw.

Designed for veteran contractors, the BASO K19AT-72 features high-grade inner and outer element materials capable of withstanding hot junction temperatures up to 1300°F. Since the K19AT-72 is identical to K19AT-72H, it serves as a direct drop-in replacement for 11/32-32 male nut connections. Utilizing this universal thermocouple reduces the need for specialized truck stock, allowing for the rapid restoration of gas appliance safety and performance in the field. When troubleshooting a pilot that won't stay lit, this 72" lead offers the flexibility and electrical integrity required for complex routing without significant voltage drop.

• Universal Compatibility: Interchanges with Honeywell Q337, Robertshaw T26, and Johnson Controls K19AA/BA/CA series.
• Extended REACH: The 72-inch lead length is ideal for large-scale equipment where standard 24" or 36" leads fall short.
• Reliable mV Signal: Delivers a consistent 25-35 mV range to ensure the electromagnetic power unit remains engaged.
• Slim Profile: The Super Slim Jim design facilitates installation in tight pilot burner brackets where space is a premium.
• Durable Construction: Engineered to handle extreme 1300°F temperatures at the tip for long-term service life.

Common Questions:

How do I know if my BASO K19AT-72 thermocouple is failing?
A failing unit typically results in a pilot light that extinguishes immediately after releasing the control knob. Use a multimeter to verify the open circuit voltage; if the reading is consistently below 20-25 mV while the tip is engulfed in a blue flame, the internal junction has likely degraded.

Can I use a 72-inch thermocouple to replace a shorter 24-inch model?
Technically yes, provided the excess lead is properly coiled and secured away from direct heat sources. However, it is always best practice to use the shortest lead possible to minimize electrical resistance and potential damage.

What is the difference between K19AT-72 and K19AT-72H?
There is no functional or technical difference between these two part numbers; they are identical components and can be used interchangeably in all standing pilot systems specified for these models.

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.