REMOTE SENSING ALLOWS FOR THE ACCURATE DETECTION OF REAL-WORLD EMISSIONS FOR THOUSANDS OF VEHICLES ON A DAILY BASIS
Hager Environmental & Atmospheric Technology (HEAT)'s Emission Detection and Reporting (EDAR) system is an eye-safe, laser-based technology capable of remotely detecting and measuring the infrared absorption of environmentally critical gases coming out of a moving vehicle.
The EDAR device is the ONLY unmanned remote sensing system able to detect emissions from vehicles on multi-lane highways and can operate unattended, without calibration, 24 hours a day, seven days a week, 365 days a year.
The EDAR system uniquely uses infrared spectroscopy methods to measure the temperature of the exhaust as it exits the tailpipe. For each vehicle, the EDAR unit detects the exhaust and measures the temperature at the moment the plume becomes visible.
EDAR uses the Differential Absorption Lidar (DiAL) method to directly detect and quantify gases such as, but not limited to:
Carbon Monoxide (CO)
Carbon Dioxide (CO2)
Nitric Oxide (NO)
Nitrogen Dioxide (NO2)
Nitrogen Oxide (NOx)
Total Hydrocarbons (HC)
Particulate Matter (PM)
Virtually Any Molecule in a Gaseous State
The temperature of the exhaust relative to the ambient temperature is an indication of whether the vehicle is in a warmed-up or cold start state. When a vehicle is in a cold start state, it will appear to be a high emitter due to emissions caused by a cold catalyst.
These measurements are reported for all vehicle and fuel types in:
grams per kg of fuel (g/kg)
parts per million (ppm)
grams per distance (g/km or g/mile)
However, EDAR’s unique ability to detect exhaust temperature enables these vehicles to be identified correctly instead of falsely categorizing them as a high emitter.
Clean Air & Efficient Emission Testing Solution
Real-world data helping you meet future policy goals
Guiding cities to make smart decisions using real-world vehicle emissions data
A safe, touchless emission testing option for enhanced programs
Providing a true assessment of complementary emissions reduction programs