Patent ID: 8359109

Claim:
A modular measuring apparatus for determining and/or monitoring at least one process variable of a liquid, a bulk good or a gas, comprising: a sensor unit for installation in a container and for registering the process variable, wherein the sensor unit produces measurement signals; a replaceable electronics unit for operating and for controlling an operation of said sensor unit, wherein said electronics unit is connectable with said sensor unit and installable on a side of the container facing away from the process and wherein said electronics unit contains at least one microprocessor; and at least one memory unit associated with said sensor unit, which is fixedly connected with said sensor unit, and in which control data are stored such that said sensor unit provides the parameters or programs required for its control and evaluation, wherein: said control data relate specifically to the control of said sensor unit, and to evaluation of said measuring signals, and are readable by said electronics unit; said microprocessor of said electronics unit is embodied in such a manner, that said microprocessor executes only basic functionalities which do not concern the controlling of said sensor unit in an inactive state, and supplies said sensor unit with an electrical alternating voltage and controls a measuring procedure in an active state; and said microprocessor transfers from the inactive state into the active state by loading said control data from said memory unit.