Demand-based, freeze-resistant, and highly accurate – our metering pump systems for exhaust aftertreatment with AdBlue®, also known as Diesel Exhaust Fluid (DEF), meet the most exacting standards for use in passenger cars, commercial vehicles, and off-highway applications. The highly functional SCR systems are now used as standard in diesel vehicles and, benefiting from the principle of a magnetically driven reciprocating piston established at Thomas, offer consistently high levels of metering quality in all areas of application over the entire service life.