OVERLOAD PROOF PRESSURE SENSOR IN PARTICULAR DIFFERENTIAL PRESSURE SENSOR

摘要

The invention relates to a pressure sensor (1) comprising a sensor body having a sensor chamber in the interior at least one first separating membrane (16a 16b) which is connected to the sensor body forming a first separating membrane chamber (15a 5b); a measuring membrane (2) which divides the sensor chamber into two sub chambers (3a 3b); a transfer fluid with which the first separating membrane chamber the first sub chamber and a channel therebetween are filled in order to transfer pressure to the measuring membrane; wherein the pressure sensor is specified for a temperature range between a minimum temperature and a maximum temperature and for a pressure range wherein the transfer fluid volume in the first sub chamber the first channel and the first separating membrane chamber is sufficient at the minimum temperature to transfer pressure to the measuring membrane over the entire pressure range without the first separating membrane contacting and when the entire oil volume enters the first sub chamber from the first separating membrane chamber in case of overload at maximum temperature and is accommodated by the measuring membrane (2) the measuring membrane undergoes no plastic deformation (1).