  Earlier we have developed and successfully tested a RICH detector prototype
consisting in a CsI coated triple GEM operated in gas flushed mode In the given
work, a modified version of this detector for a completely different
application - fire safety- is presented. The detector operates in sealed mode
and is combined with an optical system and a narrow band filter As a
photosensitive element, a CsI photocathode coated with a thin layer of
ethylferrocene was used. This detector is almost 1000 times more sensitive than
the best commercial flame sensor; it has 100 times better time resolution and
allows determining the location where the spark or flame appears
