The mobile or permanently installed ultrasonic flowmeters of the 'DeltawaveC' series from Systec measure the flow volumes of liquids from the outside without interfering with the pipe and are therefore hygienic and leak-proof. Depending on the choice of ultrasonic transducer, pipelines with DN 10 to DN 6000 can be monitored. The deltawaveC-P Ex system is suitable for applications in plants in the chemical or petrochemical industry or wherever gas explosion protection is required. The ultrasonic transducers have ExII2G Exd IIC T6...T3Gb approval. The electronic transducer is available in a housing with ExIIG Exde IIC T6 approval. With this solution, either only the electronic transducer or only the ultrasonic transducers or both components can be used in hazardous areas, depending on the measuring point.