Semaphore

A semaphore indicating the ball flow:

• As long as balls are coming the white circle signal is up.
• If no more balls are coming the yellow indicator is running the scale upwards.
• If no balls have been seen for more than 35 s the red square signal comes up.
• As soon as the next ball arrives the indicator falls back down and the white circle signal comes back up. As a result you can see the condition of the ball flow even from a greater distance - especially useful in large set-ups.