Patent ID: 7089778

Claim:
A modular gas measuring system comprising: a basic unit with an electric supply and wireless or wired data lines connected to said basic unit; a measuring unit equipped with a sensor connection for receiving an electrochemical gas sensor and a microprocessor, and connected to the basic unit by means of snap closures to form a functional unit; a plurality of expansion modules each adapted to be accommodated by the functional unit at least one of said expansion modules being accommodated by the functional unit and functionally connected to said measuring unit and another of said expansion modules is exchangeable with said at least one of said expansion modules to preform a different function from said at least one of said expansion modules or is accomodated by the functional unit and functionally connected to said measuring unit along with said least one of said expansion modules, said one of said expansion modules being a data or program memory that can be plugged or snapped into the gas measuring system and can be read by the gas measuring system, said another of said expansion modules being a key module or communication module, which can be accommodated in the gas measuring system especially by plugging or snapping in, said key module activating additional evaluation and display functions for the gas measuring system, which are stored in the gas measuring system, said communication module translating the measured signals sent by the gas measuring system corresponding to the communication standard being used, wherein said sensor connection is an interface such that both the analog data of said gas sensor plugged directly into said sensor connection and the processed data of said gas sensor module measuring remotely from said measuring unit can be read by said measuring unit.