3 IR Open Air Sensors w/3 to 1 Combiner Train Detector

Description

This is the smallest combination of IR emitters and sensors on the market today. There is no enclosure around the diodes and the trigger electronics is not located at the  reciever sensor diodes. A 3 to 1 sensor combiner is used so that if any of the beams are blocked a combined single signal wire (Yellow or White) goes to ground and is the wire that triggers our controller SKU57660001, sound card SKU33240001 or Arduino and Adafruit stuff. Check Sensors Explained. This will increase any single input trigger port to 3 sensors and can be used 3 times on that input for a total of 9 sensors per input. This is to detect train approach from either direction and at the critical crossing. Check Sensors Explained.