3M uses cookies on this site Detailed information on cookies and their use can be found in our Privacy Policy. You can customize the cookie-related settings at any time by clicking on Cookie Preferences in the footer of this page.

By clicking "Accept and Proceed" you acknowledge that you agree to the use of cookies on your computer

Accept and Proceed

Skip to Primary Navigation Skip to Site Navigation Skip to Main Content All 3M.com Site Map

PPE Safety Solutions

PPE Safety Solutions
PPE Products
PPE Solutions
Featured Products

3M™ Noise Indicator NI-100

3M™ Noise Indicator NI-100

The 3M™ Noise Indicator NI-100 is a sound level meter that alerts users to potentially dangerous industrial noise levels, helping identify areas where noise control is an issue and where hearing protection may need to be worn. The noise indicator’s small size and lightweight design make it ideal for workers in a variety of industries. One of the most affordable noise detection options available for monitoring noise levels.



  • Durable, small and lightweight, easy-to-use
  • Economical, accurate with rechargeable battery

Learn more about the noise indicator (PDF, 1.7 MB)
Visit our online catalog to learn more about the noise indicator

Flashing Green indicates noise level is below 85 dBA.

Flashing Green

When flashing green, it indicates the noise level is below 85 dBA.

Flashing Red indicates noise level is above 85 dBA and hearing protection may be needed.

Flashing Red

When flashing red, it indicates the noise level is above 85 dBA and hearing protection may be needed.

Easy to Use

Easy to Use

Simply clip the Noise Indicator to a shirt or jacket. To turn on, press and hold button until double green/red light flashes.


Social networks

Follow Us YouTube logo

Need Help?

If you have questions or want more information, please Contact Us


Download Information

Download our product information such as brochures, videos, posters and technical datasheets.


Subscribe to our PPE eNewsletter to get all of the latest updates delivered straight to your in-box.