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Description: This basic piezo sensor from Measurement Specialties is often used for flex, touch, vibration and shock measurements. A small AC and large voltage (up to +/-90V) is created when the film moves back and forth. A simple resistor should get the voltage down to ADC levels. Can also be used for impact sensing or a flexible switch.

Comes with solderable crimp pins.

Features:

  • Flexible PVDF Piezo Polymer Film
  • Wide dynamic range
  • Laminated for higher voltage output
  • 0.1" breadboard friendly leads

Documents:

Comments 25 comments

  • Hi , is there a tutorial for connect this to arduino? does it need a resistor? how the connection?I mean I would connect it to a analog in ,is it right and possible? sorry, I’m new … thanx

    • Simply follow this tutorial: http://arduino.cc/en/Tutorial/Knock or this one: http://www.arduino.cc/en/Tutorial/KnockSensor

      they use simple piezo sounders as sensors, but it works in the exact same way. Just experiment a little on the resistors, I think I used 100K or so.

  • I have just bout this sensor and I have been trying to get an output voltage from it but i haven’t succeeded. I am bending it and using a multimeter to read the voltage . Is there anything im missing ?

  • could this be good for sound energy detection and used for power harvesting and storage?..i want to know if its possible before i purchase. thansks

  • I need to create a “switch” within a PVC tube. Essentially I’ll be having a lightweight object pass downwards through the tube, trigger a switch, and continue onwards. I looked into using a motion sensor, but it would not be accurate enough for my purposes, even with much tweaking of design.

    Can I get this sensor to only respond to an object bumping it as it passes, instead of any little vibration to the build?

  • Does any one have any suggestions for how to connect to this? I read in the comments and in the Technical Manual that they advise not solder directly to the leads because the heat can damage the piezo polymer film. Has anyone tried crimps or other methods? I am also trying to pick up small “knocking” vibrations on a wooden workbench or door. would a 1M Ohm resistor be appropriate for this? Thanks!

  • These are great little sensors. I’m using them in my graduate work for detecting impacts on deployable space structures. For just a proof of concept sensor part, these are fantastic. They are exceptionally sensitive, so they pick up even the slightest vibrations.

    If you are measuring tiny vibrations, like if it’s bonded to something, say a drum skin, you won’t need a resistor. Only large deflections are likely to give you that.

  • hello
    how can i get the DT4-028k part no. 1-1002149-0 and what is the price for this part
    Thanks

  • I would like to detect whether water is flowing through a pipe without having to break into the plumbing. Could this sensor be wrapped around the pipe? If the appropriate amps and resistors were used, could this work?

  • Would it be possible to get piezoelectric film elements in larger sizes (3+ square inches)? I want to use these in a piezoelectric energy harvester application, and it would help greatly if I didnt need to daisy chain many individual units.

  • I’m not sure I’m understanding the function of this correctly. Would it work in contact microphone applications the same way as a simple piezo element? For context, I’m looking for something to use as an acoustic guitar pickup.
    http://www.instructables.com/id/Acoustic-Guitar-Pickup/

    • Page 47 of the manual is on exactly this subject. Using these as music pickups. http://www.sparkfun.com/datasheets/Sensors/Flex/MSI-techman.pdf

  • Some advice on these. DO NOT SOLDER THEM! (Especially top side soldering -haha) You might get away with regular through hole soldering if your very fast but I somewhat melted mine in about a second. Use a 3 pin female header.
    If your using them for very slight vibration sensing connect one side to ground and the other to the analog pin. Use a pull down resistor of at least 10Meg. (1/10 of the 100M input resistance on Arduino) Then use a divider on Aref to pull VDD down to under a volt. Mine (the weighted model) senses someone jumping on the other side of the room.
    Use one for each axis you want to sense. I use two positioned perpendicular for horizontal vibrations.

  • Could you use this as transducer?

    • technically, it is a transducer. are you thinking of a loudspeaker?

      • I have this hardhat that I put a normal speaker in, but it didn’t work very well. I was looking for a small piezo speaker that would fit on the head band of it. Do you think this sensor would work?

        • Oh, this is not a speaker. Unfortunately we don’t have anything that would fit that requirement, sorry!

  • Could the exact manufacturer part number be included? The datasheets that are attached are for a generic product range. None of the parts have product identifiers, other than identifying the manufacturer.
    Thanks!

  • Hi, I’m new to electronics and solder so I was wondering if there were any connectors available for these? And if so what kind do I need? Radio Shack had no help except some Female Interlocking Connectors and some Heat-shrink tubes. Any ideas?
    Thanks.

  • Im wondering if anyone knows how much resistance is needed? I’ve tried a bunch of resistors, but the values still climb.
    thanks,
    J

    • What are you using it for? A 1 Megohm is just about right for analog in on an Arduino (5v).

      • pls excuse my embarrassing ignorance but does the recommendation of a 1 meg resistor for a 5v pin imply 1.5 megs for a 3.3v input? the Audrino tutorial shows the resistor in parallel but it seems to me like ot should be in series (100% of the signal through the resistor) to reduce the voltage… what am I missing

        • I was also confused about that but I found the answer in the “Technical Manual” you can find above. Check out page 37, “Input Resistance”. Basically, the equivalent for this sensor is a voltage source in series with a capacitance. This capacitance combined with the input resistance of your Arduino (or any other circuit you’re using for measuring) creates a voltage divider. So as the capacitance increases (this depends on the frequency of the vibrations) the output of the sensor decreases. That’s why you have to choose a resistor that will minimize this effect – so-called “loading effect” http://en.wikipedia.org/wiki/Voltage_divider#Loading_effect
          Someone correct me here if I’m wrong but as I get it we’re not using the resistor to limit the current that goes in our analog input but for the reason I stated above.


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