Flameout protection is when the flame goes out, gas stove can automatically cut off the gas source protection. Gas stove flame protection is the most common way of security, one of the market there are two gas stoves flameout protection (referred extinguished Paul)

Thermocouple quenching and ion induction quenching Paul Paul.

Thermocouple principle is applied to the physical properties of metal, are temperature sensing, flameout protection action by the temperature sensing control.
 
Ion induction principle is the application of the flame of the photoelectric properties of electronic circuits needed to support the operation, no electricity is invalid; ignition speed, once the flame sensor needle off immediately breathe flameout.
 
In contrast, the use of performance thermocouple Paul put out a more stable and longer life.
You know: The stove's combustion environment is open, it is impossible to avoid being outside airflow (wind) impact
Ion induction in order to avoid accidental flameout occur frequently, some manufacturers must:
1 more a sensor needle to doubling the induction effect, ensure that at least one in contact with the flame
(2) to extend the use of electronic circuits flameout protection time. Even if the two flame sensor needle while not sense the presence, within the scope of the gas remains in the delay output as usual.
Thermocouple temperature immediately below a certain cut off the gas source, are immediate reactions, generally put out warranty time is about 9 seconds; ion induction quenching generally need to extend protection time delay belong to reflect the actual time is not put out Paul 0.1 seconds, ie approximately 0.1 seconds +6 seconds = 6.1 seconds!
Thermocouple flameout protection technology is more suitable for gas stove (open environment combustion), ion induction flameout protection technology is more suitable for gas water heaters (closed environments combustion), which is why the major gas company nominate thermocouple gas stove flame protection reasons! In fact the vast majority of gas stove manufacturers are selected thermocouple flame protection.