The Photogate is a digital switch-type sensor that has two states, ON and OFF condition. The Photogate has an infra-red transmitter and receiver that detects objects passing through the ‘gate’. Photogates can be used singly or in pairs for time, speed, velocity and acceleration measurements.

Designed to work seamlessly with the Data Harvest Dynamics system and timing part of the EasySense software.

Ideal for all your dynamics / mechanics / kinematics work.

The Photogate is supplied with a steel mounting rod which can be screwed into the base or side of the Photogate and clamped into a suitable holding device. A red On/Off indicator will light when the infrared beam is blocked. When used in a non-Timing mode e.g. Graph, the Photogate can be used to mark an event on a graph and the length of the interruption can be used to determine velocity.


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Empowering educators worldwide, from schools and libraries to renowned institutes.

The future of education is here, and it fits right in the palm of your hand. Give your students the gift of engaging, interactive, and collaborative learning experiences with our SmartSchool Systems Microscope solutions. 

Activities and Curriculium: 

5 Minute Activities with Sensors CLICK HERE for Sample

Science at Work with Dataloggers CLICK HERE for Sample

Elementary EasySense Datalogger Activites CLICK HERE for Sample

High School Chemistry Investigation with Dataloggers CLICK HERE for Sample

High School Physics Motion Momentum and Collision Investigations with Dataloggers CLICK HERE for Sample

Physics Investigations with Dataloggers CLICK HERE for Sample

Force Sensor Investigation with Dataloggers CLICK HERE for Sample


  • Dynamics experiments that involve calculating time, speed, velocity, acceleration using an inclined plane or air track
  • Acceleration due to gravity
  • Pendulum investigations
  • Measuring the time period of an oscillating body
  • Impulse and change in momentum
  • Centripetal force in a pendulum
  • Response time: less than 5 microseconds
  • Width of gap: 56mm

​The Photogate is mounted in a robust plastic housing, and the detachable clamping rod can be mounted in three different ways for easier positioning for different investigations. An LED, in the plastic mounting, flashes when the beam has been interrupted, which helps when setting up with users’ own trolleys and inclined planes.

Works with the following Dataloggers:

VHub4 and VHub8


Photogate with support rod