Device for determining or monitoring process variable for medium, has sensor unit, which produces measuring signal dependent on process variable, and two units, that exchange information signal between them

摘要

The device has a sensor unit (1), which produces a measuring signal dependent on the process variable, and two units. The two units exchange an information signal between them. A limit value is given and the information signal is limited by the limit value. The two units exchange a reference signal between them, where the reference signal is so arranged that it carries information about the limit value given in advance.