Vernier Software and Technology
Vernier Software & Technology


Product image for PhotogateProduct image for Photogate
Product in use image for PhotogateProduct in use 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
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
The photogate can be used as a laser gate for larger objects. Laser pointer sold separately.

Sample Data



  • 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
View the Photogate user manual

Experiments and Lab Ideas

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

Lab Ideas and Innovative Uses

Compatibility Requirements

The Photogate may require a compatible interface and software. Choose a platform below to see compatible interface and software options.

What’s Included

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

Ordering Information

All prices are for U.S. educators.

NameOrder CodePriceQuantity
PhotogateVPG-BTDContact Us
Optional Accessories
Bar TapeTAPEContact Us
Cart Picket FencePF-CARTContact Us
Digital Extension CableEXT-BTDContact Us
Laser PointerLASERContact Us
Laser Pointer StandSTANDContact Us
Photogate Bar Tape KitTAPE-VPGContact Us
Photogate BracketPGB-VDSContact Us
Picket FencePFContact Us
Pulley BracketB-SPAContact Us
Ultra Pulley AttachmentSPAContact Us


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 »

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