Potterton offers two types of electrodes, which are ignition electrodes and flame-detecting electrodes. The spark that starts combustion inside the burner is produced by the ignition electrode. The flame-sensing electrodes are in charge of keeping an eye on the burner to see if there is a flame. This is a crucial step that makes sure the boiler doesn't keep supplying gas when there isn't a flame.

Brand Name	Potterton