| abstract |
A sensor element ( 1 ) has at least one measurement element ( 2 ) with piezoelectric and pyroelectric properties, and measurement electrodes ( 3 ). A measurement variable and a disturbance variable act simultaneously upon the at least one measurement element ( 2 ) and the measurement signal derived from the measurement electrodes ( 3 ) includes an interference signal. The sensor element ( 1 ) has at least one compensation element ( 4, 4 ′) upon which only the disturbance variable acts, so that a correction signal used to compensate for the interference signal in the measurement signal can be derived from the compensation element ( 4, 4′ ). The invention consists in that the compensation element ( 4, 4 ′) is in thermal contact with a first support ( 10 ) and with a second support ( 11 ) of the measurement element ( 2 ), or with the measurement element ( 2 ), over its length between the supports ( 10, 11 ), so that substantially the same temperature field is established in the measurement element ( 2 ) and in the compensation element ( 4, 4 ′). |