How to Make a Goniometer

Written by joe kelly
  • Share
  • Tweet
  • Share
  • Pin
  • Email
How to Make a Goniometer
A goniometer looks like a large compass and is used to measure range of motion. (Hemera Technologies/PhotoObjects.net/Getty Images)

A goniometer measures range of motion in degrees. Physical therapists use goniometers to measure and track the range of motion of a joint such as an elbow, shoulder or knee throughout treatment. A goniometer works like a large compass; the centre section is marked with degrees, from zero to 360. It has two arms that extend from the circle, only one of which can move freely. The arm that does not move is mounted at zero degrees.

Skill level:
Moderately Easy

Other People Are Reading

Things you need

  • Two wood yardsticks
  • Circular protractor
  • 1 -1/4 inch by 1 inch bolt
  • 1 - 1/4 inch nut
  • 2 - 1/4 inch washers
  • Pencil
  • Utility knife
  • Drill

Show MoreHide

Instructions

  1. 1

    Trace the shape of the protractor onto one of the yardsticks. One curved side should but up against the end of the yardstick. The flat crossbar and the other curved side should mount flush with the yardstick and overlap the yardstick under the numbers 1 through 4. The other curved side should overlap at approximately number 5.

  2. 2

    Cut away part of one of the yardsticks so that the protractor fits on top of the end of the yardstick.

  3. 3

    Drill a hole through both yardsticks where the centre of the protractor should be.

  4. 4

    Bolt the two yardsticks and the protractor together. Place washers between the protractor and the top yardstick. The finished goniometer should look like a compass.

  5. 5

    Measure an angle by using the yardsticks to parallel the body parts being measured and read the angle on the protractor.

Don't Miss

Filter:
  • All types
  • Articles
  • Slideshows
  • Videos
Sort:
  • Most relevant
  • Most popular
  • Most recent

No articles available

No slideshows available

No videos available

By using the eHow.co.uk site, you consent to the use of cookies. For more information, please see our Cookie policy.