Using special optical techniques, AB Elektronik’s sensor is capable of detecting variances in urea concentration as small as ±3%, and can operate at temperatures from -10 °C to +85 °C. The optical measurement principle is robust against dirt and moving fluids including gasoline, diesel or coolant.

AdBlue is added to the exhaust gas stream of vehicles for selective catalytic reduction (SCR) to reduce NO_x emissions from diesel engine exhaust. SCR-equipped vehicles carry the urea solution in special tanks, from which it is added to the SCR system in small quantities, equivalent to up to 5% of diesel fuel consumption.

AdBlue is now widely available, but can only be effective if it is present at the correct concentration. And this is where our new sensor comes in, using specially developed optical measurements to ensure that the urea solution is optimally deployed.

—Phillip Joyce, Global Business Development Director at AB Elektronik