In single-burner and multiple-burner furnaces, the flame detector performs high-safety monitoring of the burner flames.
When the flame switches off, the safe control state "Flame off" is reached.
The flame detector is mainly used in large-scale power plants, thermal power stations, and chemical plants as well as for monitoring furnaces which are operated with:
Spectrum / nm
Preferred application / fuels
210 ... 380
Oil, gas (special gases of Refinery- or blast furnaces)
850 ... 1200
Oil, gas, coal, firing with high flue gas recirculation,
1200 ... 2800