Gas Interrupter Thermocouple 900mm | Flame Failure Sensor

This 900mm gas interrupter thermocouple is a replacement sensing component for compatible gas appliance flame failure systems. Its heated tip generates a small millivoltage signal used by the gas safety valve. When the flame goes out and the thermocouple cools, the signal drops, allowing the valve to close.

Choose this part by matching your existing thermocouple's length, tip, valve connection and interrupter terminal arrangement, not by appliance type alone.

Key features

• 900mm lead length: a clear measurement to help you match your existing component.
• Interrupter thermocouple design: for compatible flame failure device (FFD) and flame supervision device (FSD) systems.
• Connection details: M8 nut, M9 nut and flat spade terminal.
• Standard conical tip: check the tip shape and mounting against the original part.
• Construction: copper alloy with a stainless steel sheath at the tip.

Technical specifications

• Type: gas interrupter thermocouple, FFD/FSD sensor
• Lead length: 900mm
• Tip: standard conical
• Connections: M8 nut, M9 nut, flat spade terminal
• Material: copper alloy; stainless steel tip sheath
• Operating temperature range: 0°C to 700°C
• Output: millivoltage (mV) when heated

Applications

For compatible flame supervision systems in gas catering equipment, water heaters, fires and space heaters, and certain professional gas barbecues. Suitability depends on the appliance's specific requirements; this is not a universal fit for every model.

Check before ordering

Compare the 900mm lead length, conical tip, mounting, nut sizes and spade terminal arrangement with your existing thermocouple. Check the appliance manufacturer's part specification before purchase.

Need help identifying the right replacement? Contact Under Control Instruments with your appliance make, model and existing part reference.

Installation: Have a suitably qualified gas engineer confirm compatibility, install the component and check appliance operation.