Why boiler has 2 flame eye or flame sensor

Why boiler has 2 flame eye or flame sensor
#boiler, #flameeye, #flamesensor, #Flame eye maintenance, #marine videos, #marine boiler, #Ship, #ship videos, #Mitsubishi boiler, #Mitsubishi, #marine

[@SunilKumar-he9hy]

U told the story but not tell why 2 flame dye used

[@muhammercelik5661]

One for Aut mode, one for Manuel mode...

[@SunilKumar-he9hy]

Not undtd wap