Digital Counter can be used to calculate the time for an object passing through two photo gates. This apparatus can also be used as a timer & stopwatch.
Features:

1.  SMPS based, universal input voltage. 
2.  Timing in µ-second, mili-seocnd, second with indicators (Auto-Change).
3.  5-digit seven segment display.
4.  Positive edge trigger & level trigger mode.
5.  Sturdy push switches for stopwatch & reset.
6. 3.5mm EPST sockets to connect the photo gates.

*Supplied with 2 photo gates.