Thin-film piezo sensors offer proportional mechanical transducer capabilities

16-04-2015 | Variohm | Test & Measurement

Variohm EuroSensor is now stocking a selection of piezo thin-film sensor
products from Measurement Specialties Inc. Piezo films offer versatile
transducer capabilities, producing voltage in proportion to compressive or
tensile mechanical stress and strain.

They provide a compact and reliable solution as low-cost dynamic strain
gauges, vibration sensors, accelerometers or dynamic switch elements. Piezo
Film is also ideally suited for high fidelity transducers operating
throughout the high audio (>1kHz) and ultrasonic (up to 100MHz) ranges.

The range includes piezo cable, piezo film sheets and piezo film elements in
addition to components such as piezo switches and ultrasonic sensors.
Application areas for these materials and components are as diverse as the
products. Piezo cable for instance can be a very effective medium for cost
effective road vehicle axle counting systems where its compressive qualities
- where voltage is generated proportional to the stress - can help determine
both the number and load size of vehicles sampled.

Piezo film finds uses in simple loudspeakers for instruments or as
anti-tamper film for packaging. Piezo film elements are sub-components that
can be used in dynamic strain gauges or as vibration sensors for alarms
whilst piezoelectric ultrasound transmitters and receivers offer 'unique'
advantages for two-dimensional positioning applications such as digitising
pens, object detectors or distance measurement devices. A range of
piezoelectric laboratory amplifiers is also available to aid development,
says the company.

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