Red Led Seed Sensor AA61909 is the sensor of choice for large seed types and seeding rates of 1 to 135 seeds per second with up to 98% accuracy depending upon the application of the sensor. Examples of these include: corn, soybeans, sunflowers, sorghum, sugar beets, and edible beans. Using optical technology, the seed sensors work under the principal of photo detection. Cable Lengths 3" , 6: 12" 33" 

Connector Pinout-Schematic

• 3 Way Weather Pack
• Pin A:  Green  – Signal
• Pin B:  Black  –  Ground
• Pin C:  Red  – Supply Voltage, Power