PhysDisp - A Preview

An IR based contactless displacement sensor to ensure highly accurate distance measurements.

With PhysDisp, an IR-based contactless displacement sensor, one can consistently and accurately measure linear positions, lengths, and displacements. The patented time of flight (TOF) technique makes PhysDisp an exceedingly modern and sophisticated instrument to measure distances. The automatic switching of ranges and resolutions with changes in proximity from and area of the marker allow objects as close as 5 mm or as far as 1200 mm to be accurately measured. Connect it with the PhysLogger app to plot and record or use it as a handheld standalone device, reading values from the digital LED screen and taring with the hardware tare button.


  • IR-based time of flight (TOF) technique
  • Range: 5 mm to 1200 mm VL
  • Resolution:
    • 0.2 mm for 5 to 100 mm
    • 0.5 mm for 30 to 1200 mm
  • Inbuilt display
  • Negligible dependence on surface reflectivity
  • Hardware tare button
  • No configuration required
  • PhysInstrument Class: Digital
  • Connects with PhysLogger


  • Imitate Galileo’s inclined plane observations and gravity measurements
  • Explore engine cycles—mount on and track the motion of pistons
  • Investigate collisions, conservation of energy and momentum
  • Use it as a handheld length measuring device in an array of experiments
  • Contact sensing