Siemens QPA 2002 Room Air Quality Sensor is a device used to measure the  Co2 and VOC  in indoor environments .It is often used in commercial and industrial buildings, as well as in public spaces, to help ensure that adequate ventilation is provided and to help maintain a comfortable and healthy indoor environment.
Applications: Paint Booth, Confined Space Entry, Hazmat/Homeland Security, Industrial Hygiene and Confined Space, Airlines (wing-tank passage), Landfills, Oil and Gas, Chemical Plants, Hotels, Schools, Ambient Workplace, Indoor Air Quality Monitoring, Hospitals.