Through-beam sensors detect and count small parts, detect the edges of objects and monitor passages in systems. The emitter and receiver are housed in separate housings according to the through-beam mode. The sensor switches as soon as an object interrupts the laser light, red light or infrared light. A Displacement Sensor is a device that measures the distance between the sensor and an object by detecting the amount of displacement through a variety of elements and converting it into a distance.
Through beam sensors are well known for their superior operating range. Unlike many other sensors, they can operate from a few inches upto 300 meters apart from each other. The advantages of using a thru-beam sensor are that it’s the most accurate type of sensor and has the longest sensing range of the three. Thru-beam sensors are also the best choice when using them in a dirty environment.
Over coarse of time lens get contaminated. It’s sensing range is affected due to color and reflectivity of the target. Thru beam type requires transmitter (Tx) and receiver (Rx) at two separate locations. A safety beam, also sometimes called a photoelectric sensor, is sort of like an invisible trip wire for automatic garage doors. Two infrared sensors are placed on either side of the garage door, a few inches from the ground. The sensors are activated when the door starts closing.
