Product image for Photogate
Product in use image for Photogate
Product in use image for Photogate
Product image for Photogate
Product image for Photogate

Use the Photogate to study free fall, rolling objects, collisions, and pendulums.


Photogates allow for extremely accurate timing of events within physics experiments, for studying free fall, air track collisions, pendulum periods, the speed of a rolling object, among other things. The Vernier Photogate includes an accessory rod for mounting to a ring stand.

The gate has an input port so multiple gates can be connected in a daisy-chain configuration with up to four gates going to a single interface channel.

The laser gate mode requires the addition of a common pen laser, which is directed into the laser port. The laser may be some distance from the gate, so that you can measure the speed of larger objects such as a rocket, model car, or even a real automobile.

The Vernier Photogate being used in daisy chain mode. Extra photogates sold separately.
The photogate can be used as a laser gate for larger objects. Laser pointer sold separately.



  • Power req: 5 VDC at 40 mA
  • Infrared source: Peak at 880 nm
  • Dimension: 75 mm gate width
  • Output is high and LED off for unblocked gate
  • Output is low and LED on for blocked gate
  • Beam approximately 9 mm from the end of the gate arms

Download the user manual for full specifications

Experiments and Lab Ideas

Select a lab book to see a list of experiments and more information.

Lab Ideas and Innovative Uses

What’s Included

  • Vernier Photogate
  • (1) Interface cable
  • (1) Accessory rod
  • User manual

Sensor Requirements

The Photogate requires a compatible interface and software to collect data. Interface and software sold separately. Getting started with probeware »

Compatible Interfaces

The Photogate is compatible with these interfaces:

Ordering Information

All prices are for U.S. educators.

NameOrder CodePriceQuantity
Optional Accessories
Bar TapeTAPE$5
Cart Picket FencePF-CART$6
Digital Extension CableEXT-BTD$12
Laser PointerLASER$19
Laser Pointer StandSTAND$14
Photogate Bar Tape KitTAPE-VPG$17
Photogate BracketPGB-VDS$5
Picket FencePF$7
Pulley BracketB-SPA$12
Ultra Pulley AttachmentSPA$24

Related Products

Educational use only: Vernier products are designed for educational use. They are not appropriate for industrial, medical, or commercial applications. Product usage disclaimer »

Order Code VPG-BTD
U.S. Educator Price $45

Sample Data

Velocity of a picket fence dropped through a photogate
Velocity of a picket fence dropped through a photogate
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