Cenco Central Scientific Co. Heavy-duty String Vibrator

US $420

  • Rochester, Minnesota, United States
  • Jun 5th
This is a old buzzer, That works when plug in. No idea what its for. A member provided the following: Just wanted to let you know that this device is for classroom science demonstrations. You attach a light string to the end of the bar. As it vibrates up and down you will see a sine wave in the string. You can then vary the length and tension of the string for various effects. I have one of these and find it very useful (but noisy) for demonstrations.  Thanks Again ships to lower 48 states only no returns or exchanges all sales final please ask all queastions before buying!

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