S600-ExIR4 four wavelength point infrared flame detector contains four infrared sensors and optical filters, main sensor has the highest sensitivity to the CO2 emission spectrum generated by burning of hydrocarbons (4.4μm), other three infrared sensors to detect the ambient light, heat radiation's background light source interference, detector has several signal processing algorithms, combined with a logical comprehensive judgment of the flame flickering frequency, maximizing false alerts and the best fire detection performance. S600-ExIR4 four wavelength point infrared flame detector contains four infrared sensors and optical filters, main sensor has the highest sensitivity to the CO2 emission spectrum generated by burning of hydrocarbons (4.4μm), other three infrared sensors to detect the ambient light, Fɛɛrɛ ye kɛ̈ɛ̈r ye kɛ̈ɛ̈r ye kɛ̈ɛ̈r ye kɛ̈ɛ̈r ye kɛ̈ɛ̈r ye kɛ̈ɛ̈r ye kɛ̈ɛ̈r ye kɛ̈ Detectors aye kɛ luɔɔi ye kɔnɔ, ye kɔnɔ ye kɔnɔ ye kɔnɔ ye kɔnɔ ye kɔnɔ ye kɔnɔ ye kɔnɔ ye kɔnɔ ye kɔnɔ ye kɔnɔ ye kɔnɔ ye kɔnɔ