Urban Emissions Project Instrumentation
LGR Ultraportable Greenhouse Gas Analyser
The LGR Ultraportable Greenhouse Gas Analyzer (UGGA) is developed by Los Gatos Research. It simultaneously measures concentrations of methane, carbon monoxide, carbon dioxide, and water vapour in the ambient air. The sampled air is flushed into the instrument via a pump and concentrations are displayed in real time. The response time of this instrument is 10 seconds and the quoted repeatability is 3 ppb over a 1 second integration period for methane.
Airmar WX220 Weather Station
The Airmar weather station has an internal GPS which provides location and velocity parameters. It measures wind speed and direction with ultrasonic sensors and computes the wind velocity relative to the ground by performing vector math on the apparent wind and velocity of the weather station. It also outputs temperature, heading, pressure and more.
EM27/SUN Fourier Transform Spectrometer
The EM27/SUN Fourier Transform Infrared Spectrometer (FTIR) is made by Bruker. It records an interferogram of direct sunlight and a Fourier transform is then performed in order to determine the chemical composition of the atmosphere between the sun and the spectrometer.
G1301 Picarro Cavity Ring-Down Spectrometer
The G1301 Cavity Ring-Down Spectrometer (CRDS) is developed by Picarro. The instrument measures simultaneously concentrations of methane, carbon dioxide, and water vapour in the ambiant air and its quoted repeatability is 1.5 ppb over a 30 sec period for methane.
AIO 2 Weather Station
The AIO 2 Sonic Weather Sensor is developed by Met One Instruments and includes a built-in compass used for automatic alignment of the wind sensor. In addition to the the wind speed and direction, the sensor also outputs temperature, humidity, and barometric pressure.