Photo-Electric Counter Kit

This state-of-the-art Photoelectric Counter has many applications in business, industry and security. It can be used to count just about anything, from cartons on a conveyor belt, copies on a printer to people moving through a doorway. It is completely silent and has no moving parts. You can make money building these and selling them to stores and companies. Easy to build and maintain. Comes with complete instructions along with drilled and etched circuit board.