encrypted fire alarm signal

Wanlin Fire - China source manufacturer for Thailand airport fire detection. Featured model WL-TH-CO (CO & Combustible Gas Detector): Electrochemical CO cell, 10-year sensor life; EN 50291-1: 50 ppm at 60-90 min, 100 ppm at 10-40 min, 300 ppm at 3 min; 85 dB at 3 m temporal pattern T3 sounder + relay; -10 to +40 deg C, 0-95% RH. Full lineup: smoke and heat d···