Ultrasonic Level on/off switch

Discussion in 'The Projects Forum' started by gusmas, Oct 13, 2008.

  1. gusmas

    Thread Starter Active Member

    Sep 27, 2008
    heya people just wondering if anybody here know a decent amount of ultrasonic level detectors??? i know its not a pure out and out about electronic circuits but it still involves electronics.
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    If you are speaking of liquid level detection, the principle is the same as sonar. Send out a sound pulse and detect the echo. Time between the pulse and the echo relates to distance.