Visible Laser JR31-20N Photoelectric Switch Sensor
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A visible laser photoelectric switch sensor, can detects obtable upto 200mm.
Compares to normal Proximity sensor such as GP2Y0A21YK0F The most advantage for this sensor is its visible laser, that the sensor can detect small items, or even via a small, as if the visilble light can get the item. Besides, the on/off speed woudl be very fast, 2ms, makes it availble for special projects such as quantity counting.