Carbon Monoxide Detector RCC426B with Blue Backlig

FeatureFeatures:* Motorola IC control, Reliable without false alarming * Field audio and visible alarming * Simple installation * Excellent reliability & high stability * Self test function * Durable sensor head * Less affected by other organic solvent * High Accuracy * CE and EN50291 Standard Diagrammatic SpecificationEngineering Specification:* Power Supply: 3*1.5V AA batteries * Sensor: Electrochemical CO sensor* Alarm Style: Per EN50291* Sensitivity/Alarm Time: Within 60 90 minutes @ 50ppm CO concentration; Within 10 40 minutes @ 100ppm CO concentration; Within 3 minutes @ 300ppm CO concentration* LCD Displayer (optional): 4 digits LCD displayer* Audibility: 85dB ( at 1m distance ), Frequency 3±0.5KHZ* Led Indication /Sound Pattern: Standby: Green Led flashes once every 30 seconds Alarm: Red Led quickly flashes 4 times with unit chirping every 5 seconds, then repeat,* Low-bat Indicator: Chirp every 30s as battery lower than 3.3V with green LED flashing and Lb on LCD* Mal-function Indicator: Chirp every 30s with green LED out and Err on LCD* Power consumption: 0.3mW* Sensor Life: 3 years* Operation ambient: 0 40, 20% 90%RH* Mounting: Wall/Ceiling mounting* Dimension 100mm*40mm, Weight: 0.2kg* Comply With: CE, EN50291RCC426B With 9V Battery Backup,Blue Backlight EN50291 certificate