Photogate Timer

Product Code: ME-9215B


PASCO digital timers are used in thousands of physics labs throughout the world. They are rugged and simple to operate.  Combine the photogate timer with any of several accessories to perform ten classic physics mechanics experiments.


  • Built-in Photogate: timer serves as the base
  • Selectable Resolution: switch-selectable 1.0 ms or 0.1 ms resolution
  • Accuracy: Quartz crystal clock provides accuracy to 0.05% of full range of the measured time +/- 1 digit.
  • Memory: allows 2 measurements which must be made in rapid succession, such as pre-collision and post-collision velocity
  • Easy Setup: turn it on and begin taking measurements
  • Portable or plug-in: Use included 9 V AC adapter or use 4 “C” cells (not included)


Small parts. Not for children under 3 years.

Also Available

Time-of-Flight Accessory ME-6810A
Accessory Photogate ME-9204B
Freefall Adapter ME-9207B

Support Documents

Manual Downloads

Product Manuals for the Photogate Timer (ME-9215B)

Photogate Timer Manual (ME-9215B)
(337 KB – .pdf – English)

Combine the Photogate Timer with these items to extend capability and perform ten classic physics mechanics experiments.

Accessory Photogate

Featuring a Photogate Head with a narrow infrared beam and fast fall time that provide accurate signals for timing.

Time-of-Flight Accessory

Use with a Photogate to capture time of flght data. Timing starts when object passes through photogate and stops when object impacts this landing pad. For use with PASPORT and ScienceWorkshop Interfaces.

Freefall Adapter

This adapter is an auto release mechanism that works with Photogate Timers, Smart Timer, and ScienceWorkshop Interfaces.

Laser Switch

Acts as a large photogate for objects too large to pass through a standard photogate. Works with lasers as a light source.