Quantifit®

Because better fit saves lives


Air, Not Aerosol. Not all fit tests are the same. Not all testing methods produce the same results. Read here why the Quantifit CNP method produces more accurate tests, faster.

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Fit Testing

CNP Test: Still faster. Still more accurate. Still more dependable.

You can complete our OSHA-approved Controlled Negative Pressure (CNP) Redon protocol in under two minutes. You’ll know if a user has a basic fit in 10 seconds. It’s that easy. Quantifit uses no consumables and is not environmentally dependent. In fact, it uses air as the challenge agent. Read on for a full list of Quantifit’s features and benefits.

Fit Testing

More durable, more portable.

Quantifit provides the most accurate and verifiable fit test for respirators on the market, ensuring that your masks fit properly. We designed Quantifit for durability and portability. It is now more streamlined and lighter than previous models and includes a carrying case, keyboard, onboard memory, and PC connections.

How it Works

One tube pulls a negative pressure, and to keep the pressure constant, it has to pull out any additional air that leaks into the mask. This measurement directly tells us how much air has leaked into the mask, and that leak amount is converted to a fit factor.

Quantifit vs. Ambient Aerosol Methods

Benefits of the OHD Quantifit using CNP technology versus traditional ambient aerosol methods for fit testing.

Fit Testing Demo

This video highlights the key benefits of utilizing the OHD Quantifit and our patented Controlled Negative Pressure (CNP) Technology to perform a three minute OSHA, NFPA and ISO approved Fit Test.

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