Piezo Film elements are offered in four variations:

1)      DT series – rectangular pieces with silver ink screen printed electrodes, available in a variety of different sizes and thicknesses.

2)      LDT series – laminated polyester layer (0.005”, or 125µm) attached to a 28µm or 52µm Piezo film element.  When used in a ‘bending’ mode, laminated film elements develop much higher voltage output when flexed than a non-laminated DT elements series.   Applications for this include beam-type vibration sensors for vehicle alarms and solid state switches for counters and momentary closure type switches.

3)      FDT Series – flexible leads, or rectangle elements with silver ink screen printed electrodes. Rather than making the lead attachment near the sensor, the Piezo polymer tail extends from the active sensor area as flex circuit material with offset traces. This gives a very flat, flexible lead, with a connector at the end.

4)      SDT Series – Shielded sensor, a rectangular element with a molded plastic housing and 18” of coaxial cable. The film element, screen printed with silver ink, is folded over on itself, providing a self-shielding of the transducer area, important for applications in high EMI environments.

Piezo film design kits illustrate the use of Piezo film in different configurations and are a good starting point to learn more about Piezo film sensors and their applications.

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