You can use a Go Direct Photogate or a Vernier Photogate (VPG-BTD—built after mid-June 2003).

Go Direct Photogate
Vernier Photogate (VPG-BTD)

Note: The Vernier Photogate must be connected to a LabQuest interface (e.g., LabQuest Mini) and the sensor must auto-ID. For more information, see Why doesn't my Vernier Photogate (VPG-BTD) auto-ID?

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