LDT0-028K Piezo Vibration Sensor

Description

LDT0-028K Piezo Vibration Sensor The LDT0-028K is a flexible component comprising a 28 μm thick piezoelectric PVDF polymer film with screen-printed Ag-ink electrodes, laminated to a 0.125 mm polyester substrate, and fitted with two crimped contacts. As the piezo film is displaced from the mechanical neutral axis, bending creates very high strain within the piezopolymer and therefore high voltages are generated. When the assembly is deflected by direct contact, the device acts as a flexible “switch”, and the generated output is sufficient to trigger MOSFET or CMOS stages directly. If the assembly is supported by its contacts and left to vibrate “in free space” (with the inertia of the clamped/free beam creating bending stress), the device will behave as an accelerometer or vibration sensor. Adding mass, or altering the free length of the element by clamping, can change the resonant frequency and sensitivity of the sensor to suit specific applications. The multi-axis response can be achieved by positioning the mass off-center. Features Ultra-thin 28 µm PVDF film with Ag‑ink electrodes laminated to 0.125 mm polyester substrate. Solder‑tab termination, mountable via PCB or chassis. Available in mass-free (LDT0) and with‑mass (LDTM) versions for different frequency tuning. Standard sensitivity of ~50 mV/g, rising to ~1.4 V/g at resonance (~180 Hz). Can generate >7 V output with minimal deflection and up to >70 V when bent fully. Pulse output on deformation makes it suitable as low-power wake‑up switch. Robust to impact and mechanical stress. Operating temperature range 0 °C to 85 °C (storage: −40 °C to 85 °C). Up to 125 °C version available on request. Specifications Parameter Value Film Thickness 28 µm PVDF with silver electrodes Substrate 0.125 mm polyester laminate Sensitivity (no mass) ~50 mV/g baseline Sensitivity (resonance) ~1.4 V/g (≈180 Hz resonance) Maximum Open-Circuit Voltage 70 V (90° tip deflection) Termination Style Solder‑tab (crimped contacts) Operating Temperature 0 °C to +85 °C Storage Temperature −40 °C to +85 °C Mass Versions No‑mass (LDT0‑028K), mass‑tuned (LDTM‑028K) Dimensions Applications Vibration sensing in the washing machine Low power wakeup switch Low-cost vibration sensing Car alarms Body movement Security systems Documents LDT0-028K

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