Typical commercial flame detectors use lead sulfide (PbS). The photo sensitivity and dark resistance of PbS changes as the element temperature changes requiring temp compensation, but even temp comp is typically limited to 50°C (125°F) at an upper limit.
Recommended installation practices include ambient temperature limitations and detector protection from refractory heat which, without flicker analysis, PbS can not distinguish from flame IR energy.
Any electrical device will effect by high temperature, here you must choice the suitable flame detector for the plant or field that you want to setup it there. Some kind of flame detectors are X-Series which provided by DET-Tronics, one kind of this family stand with high temperature is "C7050/UVHT Flame Detector". For more details visit page add. below
