Eg-3 The Pilot Lamp
Published: Tuesday 14 March 2006 - Updated: Tuesday 29 March 2011
To demonstrate how the pilot lamp uses a thermoelectric magnet as a safety feature.
- Pilot Lamp Board
- Candle and holder
Click on pictures to enlarge.
The pilot lamp consists of a thermoelectric magnet connected to a valve. While the pilot lamp is on the heat generated activates the themoelectric magnet and this in turn allows gas to flow to the Pilot lamp circuit. If the Pilot lamp extinguishes the magnetic field collapses and closes the valve cutting off the supply of gas to this part of the circuit. The lever arm has been attached to the electromagnet so that movement of the valve can be clearly seen.