SainSmart HC-SR04 Ranging Detector Mod Distance Sensor (Blue)

Cheap SainSmart HC-SR04 Ranging Detector Mod Distance Sensor (Blue)
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Features

  • The Module automatically sends eight 40 kHz and detect whether there is a pulse signal back
  • Using IO trigger for at least 10us high level signal
  • IF the signal back, through high level ,time of high output IO duration is the time from sending ultrasonic to returning. Test distance = (high level time velocity of sound (340M/S) /2
  • Power supply :5V DC, quiescent current : <2mA,effectualangle: <15 ranging distance : 2cm~500 cm resolution : 0.3 cm