Conventional and older technology UV/IR detectors, using narrow band

4.3 micron IR sensors, will not respond to smoky fires or if the detector

lens is contaminated with oil and other substances since both UV and

4.3 micron signals are attenuated, obscured or absorbed by thick smoke

or detector lens contaminations. Also, these old technology UV/IR

detectors will not alarm to any fire if they are installed behind ordinary

window glass.

The Fire Sentry FS20X detector uses advanced patented algorithms for

signal processing and fire and flame analysis is designed to alarm to all

types of fires in all industrial environmental conditions. If the detector’s

UV signal is degraded due to heavy smoke or a contaminated lens, the

Fire Sentry FS20X’s patented* WideBand IR™, Near Band IR and Visible

sensors will still alarm to fire but at a reduced sensitivity and slower

response time.