PHOTOGATE TIMER: with Photogate pair

PHOTOGATE TIMER: with Photogate pair

•  Comprises a very versatile digital photogate timer, accurate to 0.0005 seconds, size 150 x 150 60 mm with 9V battery included.
•  Two photogates with thumb screw clamps for easy positioning and connecting leads.
•  Photogate opening size: 650 mm.
•  Instructions supplied.
•  Has five timing modes:
[mode 1]  - Interval mode which measures beam interruption.
[mode 2]  - Frequency mode which measures frequency of regular interruptions.
[mode 3]  - Period mode which measures the time of the first and third interruption.
[mode 4]  - Count mode which keeps track of the number of times the photogate is interrupted (for pendulum oscillations).
[mode 5]  - The timer can also be used as a stopwatch.

(Wikipedia excerpt: ..."....English Etymology From photo- +‎ gate.
Noun photogate (plural photogates) (physics) A device that measures the time between events that interrupt an infra-red beam.
....AI overview....A photogate timer is a device that measures the time it takes for an object to interrupt an infrared beam. This is typically done by attaching a flag to a moving object, and the time it takes for the flag to pass through the beam is measured. This measurement can then be used to calculate the object's velocity or other kinematic properties....")

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