Vaisala Air Quality Sensor AQT400 measures the pollution content of ambient air. The AQT400 series consists of 2 products, AQT410 and AQT420. Both models measure 4 gases (gas selection: NO2, NO, O3, CO, SO2 and H2S) and ambient parameters, such as humidity, air pressure, and temperature. AQT420 also includes a laser particulate counter for PM2.5 and PM10 particulate measurements. The gas measurement of AQT400 series is based on sensing with electrochemical cells and use of proprietary advanced algorithms that enable compensation of the impact of ambient conditions and aging of sensor elements. AQT420 is classified as a Class 1 laser device in accordance with International Standard IEC/EN 60825-1. The laser is contained in an enclosure, preventing direct physical access to laser radiation. A Class 1 laser is safe under all conditions of normal use.
AQT400 series is specifically designed for air quality monitoring networks in urban areas with traffic, road networks, or around industrial sites and transportation hubs. Thanks to its small weight and compact size, it is ideally suited for deployment even in large air quality networks.
The measurement data is sent wirelessly to a web-based database with a gateway solution or is available locally through a serial interface. Depending on local conditions, AQT400 series devices have a maintenance and calibration interval of 24 ... 36 months.