AdBlue level sensing

AdBlue is a waterlike fluid composed of urea (32.5%) and deionised water which is sprayed into the exhaust gases. Heat transforms the urea into ammonia and, reacting with nitrogen oxide in a catalytic converter, the gases are rendered harmless.

Running without AdBlue would result in an engine exceeding the permitted emission levels so it's critical to operators that AdBlue levels are maintained in the reservoir. Gentech's Custom Sensing Solutions Team worked closely with a leading manufacturer to understand what was needed and to develop a sensor that would monitor levels and allow integration options with the engines management system.

Using proven reed switch technology the AdBlue sensor is built into a robust tube structure which retains the float assembly. Gentech's Custom Solution Team is also able to adapt the size and fitting requirement of the sensor to meet the needs of individual engine or vehicle builders.

In addition to monitoring fluid level Gentech addressed a problem highlighted by vehicles operating in very cold conditions – frozen AdBlue. A heater element utilising the engines own cooling system has been incorporated into the sensor assembly to help ensure AdBlue is available within the recommended guidelines.