Infra red photo gate for time measurements in experiments on free fall, motion on a track or pendulum oscillations and for counting pulses. It can be operated in internal mode using the built-in infra-red light source or in external mode with the aid of a laser pointer, which needs to be obtained separately. It then acts as a wide-range light barrier, allowing it to be used at sporting events, for example.

• Barrier spacing: 82 mm
• Rise time: 60 ns

Spatial resolution: <1 mm
Time resolution: 0,1 ms