Honeywell 124204 quartz lens

Honeywell 124204 quartz lens, listed under catalogue article 534.457.001 and manufacturer code 124204/U, 534.457.001. This part belongs to the sensor components category. Quartz lenses of this type are used in optical flame detectors for burners and industrial heating. The lens sits in front of a UV or infrared sensor and protects the sensitive element from combustion chamber heat and contamination while allowing the flame radiation to pass through. When replacing a quartz lens, ensure it is free of cracks, pitting, or clouding, as any damage will attenuate the signal and can cause nuisance lockouts or delayed flame detection. The lens is selected by its outer diameter, thickness, and optical transmission range for the detector model in use; the correct fit must be confirmed against the existing assembly. Always handle the lens by the edges and clean it with a lint-free cloth approved for optical surfaces before installation, since fingerprints or debris scatter the radiation and reduce the detector’s response.