About Hearing Protection
Earmuffs and earplugs are rated by the Noise Reduction Rating (NRR) guidelines, which are enforced by OSHA.
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Sound Level Testers


Take readings of ambient sound levels. Testers have a selectable frequency weighting—an electronic filter that adjusts the way the tester measures sound. The A weighting is similar to the response of the human ear and is used by OSHA. The C weighting is suitable for measuring the sound level of machinery.
Use the calibrator (sold separately) to calibrate the tester before each use and verify that it is working properly.
Testers that cannot be sold to Canada are restricted by import regulations.
Measuring Range, dBA | Sound Frequency Weighting | Mount Type | Ht. | Wd. | Dp. | Batteries Included | Includes | Specifications Met | Cannot Be Sold To | Each | |
Testers | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
40-130 | A, C | Portable | 9" | 2 1/4" | 1 3/4" | Yes | __ | __ | Canada | 00000000 | 000000 |
35-130 | A, C | Portable | 10" | 3" | 1 1/2" | Yes | Storage Case | ANSI S1.4 Type 2 | __ | 00000000 | 000000 |
Testers with NIST Certificate | |||||||||||
40-130 | A, C | Portable | 9" | 2 1/4" | 1 3/4" | Yes | __ | __ | Canada | 00000000 | 000000 |
35-130 | A, C | Portable | 10" | 3" | 1 1/2" | Yes | Storage Case | ANSI S1.4 Type 2 | Canada | 0000000 | 000000 |
Calibrators | 00000000 | Each | 0000000 |
Sound Level Monitors

Continuously measure ambient sound levels. The display alerts you when levels either exceed or fall below your programmed thresholds. When operating the monitor with the included 120V AC adapter, four warning lights will also flash when a threshold is reached. Monitors have a microphone that rotates 180°. They can be surface mounted or propped up using the attached folding stand. These monitors cannot be sold to Canada due to import regulations.
You can select the frequency weighting—an electronic filter that adjusts the way the monitor measures sound. The A weighting is similar to the response of the human ear and is used by OSHA. The C weighting is suitable for measuring the sound level of machinery.
Use the calibrator (sold separately) to calibrate the monitor on a regular basis and verify that it is working properly. Remote microphone cable (sold separately) allows you to use the monitor’s microphone up to 15 ft. from the display.
Measuring Range, dB | Sound Frequency Weighting | Fasteners Included | Mounting Hole Dia. | Power Source | Electrical Connection | Batteries Included | Number of Batteries Required | Battery Size | Specifications Met | Cannot Be Sold To | Each | |
Monitors | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
30-130 | A, C | No | 1/2" | Battery, Electric | Plug In | No | 8 | AA | ANSI S1.4 | Canada | 0000000 | 0000000 |
Monitors With NIST Certificate | ||||||||||||
30-130 | A, C | No | 1/2" | Battery, Electric | Plug In | No | 8 | AA | ANSI S1.4 | Canada | 0000000 | 000000 |
Hearing Protection Fit Testing Systems

In a matter of minutes, confirm your earplugs deliver the right level of hearing protection. These kits help you meet OSHA standards for protection from excessive noise. Conduct the test onsite—everything you need, including a tablet with software already installed, is included. To use this kit, you will undergo a hearing test with and without your earplugs to determine the lowest volume you can hear. The system then calculates the difference between the scores and produces a personal attenuation rating (PAR).
Once the test is complete, you’ll receive a full report to help you choose the best earplugs. The results automatically upload to cloud storage and can be accessed on multiple devices.
Ear Cup | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Measuring Range, dB | Accuracy, dB | Frequency Range, Hz | Connection Type | Range, ft. | Material | Color | Ear Cushion Material | Headband Material | Batteries Included | Sound Level Tests | Includes | Software Included | Each | |
Over Head Fit | ||||||||||||||
Dual Output | ||||||||||||||
0-100 | ±3 | 200-800 | Bluetooth | 160 | Plastic | Black | Foam | Plastic | Yes | OSHA Compliant 29 CFR 1910.95 | Headphones, Tablet, Cloud Storage, Carrying Case | Yes | 00000000 | 000000000 |