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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.


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

Learn more about the noise indicator (PDF, 1.7 MB)
Learn more about hearing conservation and protection products
Learn more about detection and monitoring equipment

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

Easy to Use

Easy to Use

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

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Where to buy 3M PPE Safety Products. Pricing is available from your local 3M authorized safety distributor.

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