Figaro’s TGS5042 is a battery operable electrochemical sensor which offers several advantages over traditional electrochemical sensors. TGS5042-B00 CO sensor poses no risk of electrolyte leakage, can detect concentrations as high as 1% CO, operates in a range from -5˚ and +55˚C, and  Carbon Monoxide detector TGS5042-B00 has lower sensitivity to interferant gases.  
CO detector TGS5042 B00 Features:
Target gases Carbon monoxide
 Typical detection range 0 ~ 10,000ppm
Battery operable 
High repeatability/selectivity to CO
 Linear relationship between CO gas concentration and sensor output 
Simple calibration
Long life
Applications:
Residential and commercial CO detectors
CO monitors for industrial applications
Ventilation control for indoor parking garages
 Fire detection