Universal Gas Thermocouple - 600mm

The 600mm universal gas thermocouple is a compact and reliable flame failure device designed to fi...

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Product Information

Full details

The 600mm Universal Gas Thermocouple is designed for homeowners and DIY enthusiasts looking to maintain or repair gas appliance safety systems. Its primary benefit is providing a reliable flame failure mechanism that automatically shuts off gas flow if the pilot light is extinguished, ensuring peace of mind. A key caveat to keep in mind is that while the unit features a universal design, users should verify their specific appliance mounting requirements and fitting sizes before beginning installation to ensure a secure connection.

All features

Model Part Number	600mm
Brand	Under Control Instruments

Extended Product Information

FAQs

Is this thermocouple compatible with all gas appliances?

It is designed as a universal fit for many standard gas valves, but you should verify your appliance's specific thread size and mounting style.

Can I trim the 600mm line if it is too long?

No, you should never cut or modify the length of the thermocouple as it contains a delicate internal conductor that will be permanently damaged.

What tools do I need for installation?

Generally, a small adjustable wrench is sufficient to tighten the nut at the gas valve and the pilot assembly.

How do I know if my thermocouple is faulty?

If your pilot flame lights but goes out as soon as you release the control knob, the thermocouple is likely failing to generate enough voltage to hold the valve open.

Should I use pipe tape on the thermocouple threads?

No, thermocouple threads are typically compression fittings and do not require thread seal tape.

Troubleshooting

Pilot flame will not stay lit after releasing the knob.

Ensure the thermocouple tip is fully immersed in the pilot flame and that the connection to the gas valve is tight.

No signal detected by the valve.

Check the copper line for any sharp kinks or structural damage that may have occurred during installation.

Pros and Cons

Pros

Ensures critical safety for gas-operated appliances
Compact 600mm length is perfect for tight spaces
Universal design simplifies replacement sourcing
Includes pre-fitted connectors for faster setup

Cons

Length may be too short for larger or floor-standing appliances
Requires careful handling to avoid kinking the sensor line
Installation requires basic gas safety knowledge

Setup, Compatibility & Care

Before installation, ensure the appliance gas supply is completely shut off and the unit is cool to the touch. Remove the existing thermocouple, paying close attention to how it is threaded into the pilot assembly and the gas valve. When installing the 600mm unit, ensure the sensor tip is positioned directly in the flame path of the pilot light, but avoid bending the copper tubing into sharp, tight corners which can cause internal damage or signal degradation. Periodically check the sensor tip for carbon buildup and clean it gently with a soft cloth to ensure accurate temperature readings.