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Sensoren auf der Basis von Oberflächenwellenbauelementen für Messungen in Flüssigkeiten

: Drobe, H.; Heidenreich, T.; Kößlinger, C.; Mayer, A.; Ruge, I.

ACS Organisations GmbH, Wunstorf:
Sensor '91. Proceedings. Bd.II
Sensor <5, 1991, Nürnberg>
Conference Paper
Fraunhofer IFT; 2000 dem IZM eingegliedert
chemischer Sensor; Flüssigkeitssensor

A considerable demand for precision liquid-sensors designed to detect a variety of substances is obvious in the supervision of physiological procedures, biotechnological processes and in environmental analytics. Microweighing with SAW-devices is a highly promising sensing principle with respect to the sensitivities that can be obtained. Mass loading of a few pg of a substance on the sensor surface can still be detected significantly using specially designed SAW-devices. Sensing system based on a HPSW-delay line is presented. It renders the on-line detection of mass loading even in liquid media. The successful use of HPSW-modes for SAW-sensors marks a major breakthrough in the application of SAW-sensors for measurements in liquids.