The Garland 4523505 Range SIT Thermocouple 18" helps ensure safe burner operation by monitoring flame presence and controlling gas flow in compatible ranges. This temperature-sensitive device generates a small electrical signal when heated by the pilot flame, allowing the gas valve to remain open only when ignition is confirmed. If the flame goes out, the signal stops, prompting the s... https://www.partsfe.co.uk/garland-4523505-sit-type-18-metric-thermocouple