ATI Airtest Technologies Inc. manufactures and sells air testing equipment and related services in Canada and the United States. It offers CO2 demand-controlled ventilations, gateways, kitchen and parking garage demand-controlled ventilations, and thermostats, as well as air velocity products. The company also provides wall mount CO2 sensor; battery powered CO2 monitoring tool; personal airtest monitor; differential pressure sensor; in duct / in unit mount self-calibrating CO2 transmitter; splash resistant and wall mount self-calibrating CO2 transmitter; wireless micro-router/gateway for point-2-point wireless CO2 control; advanced garage ventilation controller; integrated sensor/controller that can provide direct actuation of fans or alarms; data logger for humidity, temperature, air pressure, CO2, and external sensors; multifunctional hand-held meter, and cable passive cable temperature sensor. Its products are used in agriculture, building control & air quality, communication, data logging/portables, and industrial applications. The company was incorporated in 1996 and is headquartered in Delta, Canada.