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Use the 505 photo / contact tachometer to determine RPM and surface speed. The 505 is a combination photo and contact tachometer that also measures surface speeds of belts and wheels.

505 Optical/Contact Tachometer
  • Non-contact (photo/optical) and contact RPM and surface speed
  • Wide Measuring Range: 0.5 to 30,000 RPM
  • Last measurement, maximum measurement and minimum measurement automatically saved and recalled
  • Measure motor input and output shaft speed
  • Determine conveyor belt speed
  • Confirm fan, motor, and gear RPM
  • Measure RPM of flywheels and pumps
  • Monitor pulley rotation RPM and turbine speeds

$149.95
USA Suggested List Price

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Digi-Key Electronics
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The TPI Model 505 is a combination photo and contact tachometer that also measures surface speeds of belts and wheels.

Model 505 Measurement Procedure:

  1. Unscrew contact collar from optical end of 505 (if attached).
  2. Attach a piece of reflectIive tape on the rotating object to be measured.
  3. Depress and hold the START button and then press the Photo button (lower right) on the 505.
  4. With the start button depressed, point the optical end at the rotating surface so the relective tape passes the lens every rotation.
  5. Read the RPM on the LCD display

Field Testing the TPI 505 Photo Tachometer

  1. Point the 505 at the palm of your hand and press the on button. You should see light on your hand from the lens of the 505. If you do not, replace the batteries and test again.
  2. Point the 505 at a fluorescent light (closer to the light is better). Press the on button. The displayed reading should be 7200RPM +/- 10 RPM.
 Model 505 Specifications
 Photo Tachometer  Range: 6 - 30,000 RPM
 Accuracy: ± 0.1% of FS + 1 digit
 
 Contact Tachometer  Range: 6 - 20,000 RPM
 Accuracy: ± 0.1% of FS + 1 digit
 
 DC Amps  Maximum Input: 10A
 Maximum Resolution: 0.01μA
 Accuracy: +/-0.15%
 
 Surface Speed  Range: 0.9 - 3,046 m/min
 Accuracy: ± 0.1% of FS + 1 digit
 Range: 2.0 - 9,990 ft/min
 Accuracy: ± 0.1% of FS + 1 digit
 
 Display Type  5 Digit LCD
 Operating Temperature  32° to 122°F (0° to 50°C)
 Operating Humidity  80% Max. R.H
 Power Supply  AA Alkaline Batteries (2 each)

TPI Model 505 Demonstration Video

Model 505 Applications

  • Measure motor input and output shaft speed
  • Determine conveyor belt speed
  • Confirm fan, motor and gear RPM
  • Measure RPM of flywheels and pumps
  • Monitor pulley rotation RPM and turbine speeds

Frequently Asked Questions

  1. Can I test my 505 photo tachometer to make sure it is operating properly?
    Yes, testing the 505 is easy.Point the 505 at the palm of your hand and press the on button. You should see light on your hand from the lens of the 505. If you do not, replace the batteries and test again. Point the 505 at a fluorescent light (closer to the light is better). Press the on button. The displayed reading should be 7200RPM +/- 10 RPM.
  2. My 505 is reading higher than the RPM being measured. What might be wrong?Try replacing the batteries. As the batteries get weak the reading will increase. The low battery indicator (bat) will display to indicate the batteries require replacement.

Product Documentationpdf-icon1

Click below to view or download product documentation PDFs:

505 Manual

505 Data Sheet

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