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IR Break Beam Sensor - 5mm LEDs - 5 Pairs

SKU 40002168

Easily detect motion of a passing object with these infra-red beam break sensors from PMD Way. 

Each pair includes a transmitter and receiver unit, when an object passes between the two - and its not transparent to infra-red - it breaks the beam and this is reported by the receiver unit.

The receiver is open collector transistor output which means that you do need a pull up resistor if you want to read a digital signal off the signal wire. Most microcontrollers have the ability to turn on a built in pull up resistor.

If you do not, connect a 10K resistor between the white wire of the receiver and the red wire. If you want to control a relay or LED or whatever, it can sink up to 100mA to ground.

Each order of one quantity is for five pairs (a pair being a transmitter and a receiver unit).


  • Maximum sensor distance: ~25cm
  • Operating voltage: 3.3~5V DC
  • Transmitter operating current: 10mA @ 3.3V; 20mA @ 5V
  • Receiver LED can sink 100mA
  • Transmitter and receiver LED Angle: 10 degrees
  • Response time: <2ms
  • Dimensions: 20 x 10 x 8mm
  • Wire length : 234mm

Download datasheet for more information (pdf).