gas alarm: detecting CO, LPG ,natural gas, concentration LCD display / LED display, support back up battery, work with valve

The gas alarm  with following TECHNICAL  SPECIFICATION

Japan FIRAGO electrochemical sensor
Operating voltage: 120/230V AC , can support 9V alkaline back up battery;  chargeable battery recommended;

Wall mounted;
Alarm output: Sound&Flash alarm;
Alarm level: >400PPM CO between 4-15 minutes;>150PPM CO between 10-50 minutes;>70PPM CO between 60-240 minutes;
Drivable accessaries: electromagnetic valve & exhaust fan;
High Reliability sensor;
MCU processing adopted,SMT adopted,good stability
Malfunction auto-check indicator
Dimension: 118.5*82*43mm .             
Execute criterion:GB15322;EN50291;UL2034