The BCI 24-Dx monitors the pressure difference in in-line filters and technically corresponds to a microprocessorcontrolled pressure sensor with 2 switching outputs for advance warning (filter element nearly depleted) and cut-out (filter element full). At the same time the current pressure drop is output via 4-20 mA interface. The BCI 24-Dx is alternatively available in a more affordable version, only available with IO-Link interface.