... unit; Specification: * Power supply: DC9V* The sensitivity and time: 50ppm, alarm in 60-90 minutes 100ppm, alarm in ... 30 seconds Alarm: Red Led quickly flashes 4 times with unit chirping every 5 seconds, then repeat, * Low ... hours * Direct control on material, testing, quality, lead time ect. * Flexible Payment terms ranged at different quantity * ... CE&EN50291 7 years sensor Co Detector with LCD Display