This is best for areas too large to use a different device. Examples include outdoor areas, areas with a lot of foot traffic, curved perimeters, etc. 

How to Use Measuring Wheel (from the Johnson Level website):

1. Make sure the wheel surface is clean. Any dirt or loose impediments can affect the measurement. Remember, the length is based upon the wheel’s rotation.
2. Place the tool exactly where the measurement starts. Rotation is proportional to length, so it’s important to keep starting and ending points precise.
3. As you walk, keep a steady pace. Changing pace can affect the wheel’s rotation.
4. When you reach your ending point, pick the device up. This avoids any further wheel rotation.
5. Take your measurement and record data.

Source: https://www.johnsonlevel.com/News/SurveyorsWheel

Check out our K12 Energy Benchmarking Lesson: Building Envelope Audit.

Equipment Type Sensors and measuring tools

Focus Area Energy efficiency/use

Program Area K-12 Benchmarking