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Timer and Photogates

Item # P4-1450

Regular price $320.00
Regular price Sale price On Sale $320.00
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Buy 6 and pay $288.00 each!

Digital Timer & photogates. No computer required for this simple, intuitive data collection device. Complete set includes Timer, two photogates with cords, AC adaptor, user's manual, and hard carrying case.

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Additional Details

Get the time at each photogate and the time between each at the same time!

Our Digital Timer and Photogates uses an infra-red beam that, when broken, registers a meticulously accurate time measurement.  Students can choose from five timing modes:

  1. Stopwatch Mode:  Measures in seconds and is accurate to one hundredth (0.01) of a second from 0.01 to 59.99 seconds.  After one minute, the display switches to minutes: seconds.
  2. Interval Mode:  Uses one or two Photogates to electronically collect times from up to 3 different locations.  Photogate A, Photogate B, and/or the time between the two allowing for experiments on speed or acceleration.
  3. Frequency Mode:  Measures the frequency of anything that breaks the light beams in the Photogates regularly, or the frequency of signals applied to the inputs.
  4. Period Mode:  Measures the period of repetitive motions to 0.0001 seconds accuracy
  5. Count Mode:  Counts whenever anything breaks the light beam, or sends a signal.  There are two independent counters; each can each count up to 19,999.

Photogates are equipped with handy thumbscrews that are easy to connect and reposition. The Timer performs best when fully charged.

    WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information go to

    Products being sold are not toys. They are for Educational / Laboratory use only. They are not for use by children 12 and under.


    What’s Included

    • 1  Timer with rechargeable battery (Lithium battery: 1800 mAh, 3.7v, 6.66 watt-hours)
    • 2  Photogates with firewire data cords 
    • 2  Photogate mounting brackets w/ hardware 
    • 1  AC adapter 
    • 1  Hard carrying case

    Features & Specs


    Time Reference

    • 6.144 MHz quartz crystal
    • 0.65-microsecond internal resolution
    • 0.0001-second display resolution

    Input Voltage

    • 9 V DC/500 mA Minimum (Center Tip Positive)

    Sensor Input

    • Two TTL falling edge triggered inputs using 1394 connectors


    • Gate A, Gate B, and Interval A-to-B photogate timing with:
      • 0.0001 s resolution from 0.0000 to 99.9999 s
      • 0.001 s resolution from 100.000 to 999.999 s
      • 0.01 s resolution from 1000.00 to 9999.99 s
      • 0.1 s resolution from 10000.0 to 99999.9 s


    • Dual channel plus frequency differences (A, B, A-B, B-A) with:
      • 0.0001 Hz resolution from 0.0000 to 99.9999 Hz
      • 0.001 Hz resolution from 100.000 to 999.999 Hz
      • 0.01 Hz resolution from 1000.00 to 9999.99 Hz
      • 0.1 Hz resolution from 10000.0 to 99999.9 Hz


    • Dual channel (A or B) period measurement with:
      • 0.0001 s resolution from 0.0000 to 99.9999 s
      • 0.001 s resolution from 100.000 to 999.999 s
      • 0.01 s resolution from 1000.00 to 9999.99 s
      • 0.1 s resolution from 10000.0 to 99999.9 s


    • 0.01 s resolution to 999999.99 s


    • Dual channel (A or B) counters to 999999 each channel

    FCC Compliance

    • This equipment has been tested and found to comply with the limits for a class A digital device, pursuant to part 15 of the FCC rules. These rules are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. The equipment generates and uses radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications.

    Working Time Battery

    • >40 hours

    Battery Specs

    • Rechargeable lithium battery: 1800 mAh, 3.7v, 6.66 watt-hours

    Power Consumption

    • 0.015 W without photogate, 0.25 W with two photogates



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