Enabling Contamination-Free Flow Measurement and Air Bubble Detection with Piezo-Based Ultrasonic Transducers.

Fully automated flow measurement or air bubble detection is the basis of many industrial systems in which liquids are moved and need to be monitored. Whether in consumer- or large-scale water meters, gas flow measurement in pipelines or air bubble detection in plants of the food or pharma industry – ultrasound can detect the flow of various media contactlessly and thus without any contamination.

The operating frequency of ultrasonic transducers is determined by various factors: The geometry of the piezo, the connection with matching layers, its bonding on substrates or integration in housings. The available installation space and the type of electrical contacting affect the electrode structure of the piezo elements and thus their acoustic vibration behavior. The temperature when using the transducer determines the choice of materials: The piezo ceramics, but also electrical connecting parts and adhesives.


How do piezo elements work in ultrasonic transducers? Which value-added designs do we implement? Learn more about our transducer capabilities for smart metering in our whitepaper.

White Paper

Smart Metering with Ultrasound

Contactless Monitoring of Liquids and Gases
Version / Date
WP4030E 2020-09
Version / Date
WP4030D 2020-09
Document language
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PI has profound know-how in the field of customized transducers for smart metering. With more than 25 years of expertise in manufacturing and assembling ultrasonic transducers, we offer various piezo geometries, electrode configurations and flexible production quantities. Our piezo experts also handle further processing steps for you: Whether it is gluing piezos to membranes or assembling complete transducers, PI can do more for you than just manufacturing piezoceramic elements.

Physik Instrumente Piezo Technology

Learn more about our products for fluid monitoring here:

Talk to us now and we will find a solution for your specific application!