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Monday 8am - 5pm Tuesday 8am - 5pm Wednesday 8am - 5pm Thursday 8am - 5pm Friday 8am - 5pm

OHD

OHD specializes in the instrumentation and software to help protect your employees’ health and manage occupational risks.

OHD is the manufacturer of the QuantiFit2 - the fastest and most accurate fit testing device on the market. Occupational Health Dynamics offers a range of products and services to help you protect your employees and manage your occupational risks. Whether you are looking for The QuantiFit2 Respirator Fit Tester, Noise Dosimeters, Audiometer, Vision Screener, Breath Alcohol Instruments, or a Sound Level Meter, we can provide you with a complete solution.

11/05/2025

A quieter way to fit test. 🔇

In this clip from our recent Inside AeroFit webinar, OHD's Dylan Staack shares details about AeroFit's patent pending silent operation, one of the key features that makes our new CNC respirator fit tester stand out.

Designed for both disposable and elastomeric respirators, AeroFit removes the noise you’d expect from other devices, creating a pleasant fit testing experience.

Missed the webinar? Watch it anytime on YouTube!
🔗: https://youtu.be/aTcMPF0YKSk

11/03/2025

We had the pleasure of spending the day in Shrivenham with our U.K. partners at Shawcity and Managing Director Neil O'Regan, where our CEO, Luke Allen, and European Business Development Manager, Adam Marczak, joined the Shawcity team for hands-on AeroFit training and a productive strategy discussion.

Always great connecting with a team as dedicated and forward-thinking as Shawcity. Great things ahead! 💪

10/31/2025

Happy Halloween from Team OHD! 🎃

From Snow White and the Seven Dwarfs to Ted Lasso and even a walking, talking QuantiFit2, our crew brought serious creativity (and maybe a little candy) to the office this Halloween.

We’re proud to work with a team that protects workers’ health every day and still finds time for a little fun along the way! 👻

10/28/2025

When it comes to respirator fit testing, not all CNC/APC devices are built the same.

AeroFit was designed to make the process faster, easier, and more intuitive, without the complexity or noise you’ll find in other systems.

With features like silent operation, particle generation management, preloaded respirator lists, and automated daily verification, AeroFit sets a new standard for user experience while delivering precise and objective results.

See how AeroFit stacks up against other CNC/APC fit testing technologies in the chart below. 👇

Want to learn more? Visit: ohdglobal.com/product/aerofit/

10/27/2025

When the flames are out and the scene is secured, the real work begins: determining what caused the fire. But small missteps in the first hours of evidence collection can weaken a case, delay resolution, or increase costs.

That’s why OHD is proud to partner with ION Science Ltd, providing world-class technology for accurate detection and analysis at every stage of fire investigation.

🔥 Learn more about Ion Science instruments: ohdglobal.com/product/ion-science/

10/24/2025

We can’t promise the stars will improve your fit factor, but they might say something about your testing style. 🔮😉

Swipe through and see what your zodiac sign says about your respirator fit test results.

Whether you’re an Aries charging through the checklist or a Virgo triple-checking your seal, one thing’s for sure: the stars align best when your respirator fits right!

(Just for laughs, we’ll leave the real fit testing results to your QuantiFit2 or AeroFit 😄)

10/23/2025

Is your fit testing program as strong as you think?

Building a strong program means going beyond OSHA minimums to create a culture of trust and safety in your workplace. That's why we have created a practical guide to help you evaluate, improve, and sustain a stronger fit testing program.

Click here through to learn how to strengthen your fit testing program: https://www.canva.com/design/DAG2icsN4IU/P_cWpY9QtqQdK2LJJzzgZQ/view

When you’re ready to put these steps into action, schedule a demo with our team at ohdglobal.com/demo

10/20/2025

Every message like this reminds us why we do what we do.

OHD Academy gives operators the ability to learn at their own pace, build confidence through clear, hands-on courses, and master OHD instruments so they’re always ready for every fit test. Because learning should be simple, practical, and built for the real world.

Courses include:

• How to Use the QuantiFit2
• A Guide to Logic PC Software
• How to Use the AeroFit (Coming Soon)

Explore OHD Academy and start learning today! https://ohdglobal.com/ohd-academy/

10/13/2025

It was great having former OHD CEO Howie Mills back at our Birmingham headquarters last week.

Howie’s leadership has left a lasting mark on OHD, and we were glad to reconnect, share stories, and look ahead together with our current leadership team: Luke Allen (CEO), Hunter Strickler (COO), Michael Hicks (CFO), joined by Glenn Warr, CEO of Sensidyne.

Overall, it was a good day of connection, perspective, and honoring OHD’s past while focusing on what’s ahead!

10/10/2025

Good food. Great people. Perfect fall day.

Our team spent the afternoon enjoying great food, laughter, and time together, and it’s moments like this that remind us honoring our mission starts with honoring our people.

Big thanks to our grillmasters, Luke Allen, Allen Isom, and Craig Simmons, for firing up the grill and fueling a memorable OHD Fall Cookout! 🍁💪🏼

10/09/2025

OHD was proud to serve as a Gold Sponsor of the ISRP Europe Respiratory Fit Testing Workshop in Milan, Italy. This event brought together global experts and practitioners to explore the latest developments in fit testing standards, technologies, and programs.

Our European Business Development Manager, Adam Marczak, and Senior Technology & Research Manager, Stephanie Lynch, PhD, CIH, CSP, both presented on respiratory fit testing and demonstrated our QuantiFit2® (CNP) and AeroFit® (CNC) instruments.

We were also proud to have our Italian partners, Recom Industriale, join us at the event. It was so great spending time with our friend and partner Alessandro Bersani!

As the only global manufacturer offering both Controlled Negative Pressure (CNP) and Condensation Nuclei Counting (CNC) technologies, OHD is committed to advancing the science and accessibility of respiratory fit testing worldwide.

10/08/2025

Every fit test is more than a requirement.
It’s protection you can measure.

The QuantiFit2, powered by OHD’s patented Controlled Negative Pressure (CNP) technology, delivers an accurate fit test in under 2 minutes — with no consumables.

• Unlimited Portability
• Full OSHA and ISO Compliant Test in 2 minutes or less
• Patented Controlled Negative Pressure Technology Utilizing Air as the Challenge Agent

See what else sets the QuantiFit2 apart: https://ohdglobal.com/product/quantifit2/

Address

2200 Resource Drive
Hoover, AL
35242

Opening Hours

Monday	8am - 5pm
Tuesday	8am - 5pm
Wednesday	8am - 5pm
Thursday	8am - 5pm
Friday	8am - 5pm

Telephone

+12059800180

Website

http://www.ohdglobal.com/

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Our Story

OHD offers a range of products and services to help you protect your employees and manage your occupational risks. Whether you are looking for The Quantifit Respirator Fit Tester, The QuantiCheck for the world’s first quantitative user seal check, Noise Dosimeters, Audiometers, Vision Screeners, Breath Alcohol Instruments, or a Sound Level Meters, we can provide you with a complete, personalized solution.

OHD