3 Packs Carbon Monoxide Detectors - Hembisen CO Alarm Detector Monitor Battery Operated with Digital Display for House Kitchen Restaurant Hotel Office About this item ?ME2 High-precision Sensitivity Sensor?: High Reliability Electrochemical Sensor, Excellent Repeatability and Stability, Sensitive Response, Rapid Alarm. ?Micro-processing Intelligent Recognition?: When a carbon monoxide gas leak occurs, it can quickly identify the gas and emit an alarm of 85 decibels to avoid dangerous accidents and ensure personal and property safety. ?Alarm Standard?: 50ppm - Alarm within 60 to 90 minutes; 100ppm - Alarm within 10 to 40 minutes; ?200ppm - Alarm within 1 minutes. ?Power Saving Design?: When there is no carbon monoxide gas in the surrounding environment, the device display will automatically turn off the screen and turn on the power saving mode. ?Value Package Includes?: 3carbon monoxide detector,32 screws, 3 manuals Product Description Hembisen carbon monoxide detector The Hembisen carbon monoxide detector effectively predicts dangerous gases and sends out 85DB alarms. It is used to detect carbon monoxide gas leaks to avoid dangerous accidents and protect personal and property safety. The gas detection alarm adopts MCU-PROCESTS processing, stable work, sensitive response and simple installation. Functional Features LCD Display Carbon Monoxide Gas Concentration Real-time display of gas environment status allows you to react quickly. Microprocessor Intelligent Recognition Intelligent identification of toxic gases Low power consumption design Static current: 15uA Alarm current: 10mA Carbon monoxide detector battery powerd ME2 High-reliability Electrochemical Sensor ME2 Sensor monitors environmental conditions with high precision, allowing you to know the situation in time and react. Sensitivity Alarm Time: The concentration reaches 50PPM within 60-90 minutes, LCD displays the concentration and sends out an alarm; The concentration reaches 100PPM within Ten - Forty minutes, LCD displays the concentration and sends out an alarm; ?200PPM within 1 minutes, LCD displays the concentration and sends out an alarm Operation instructions: 1. Unscrew the battery cover 2. Power on: Install 2 AA batteries (not included ), the LCD display will display a 90-second countdown, and when it drops to 1 second, the display goes out. 3. Test: Press the test button, the screen lights up, and the alarm "D" three times 4. Standby: The green light flashes once every 30 seconds, indicating that the detector is working normally. Technical parameters: Power Supply DC3V Static current 15uA Alarm current 10mA Operating temperature -20? ~50? (? ) Moisture range 15~90 RH Warning concentration 50-999 ppm Alarm decibels ? 85 Db