Type Dosaodor-D is a computerized odorant injection system for natural gas that uses solenoid injector technology that eliminates the need for plunger pumps.The solenoid injectors permit odorant injection accuracy to be maintained over the entire range of the system, approaching infinite turn down. Dosaodor-D is in conformity with the Pressure Equipment DirectivePED 2014/68-UE and is classified in Category II