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.

At the Ohio Safety Congress & Expo this week, Stephanie Lynch, PhD, CIH, CSP, Regulatory and Standards Director at OHD, ...
03/13/2026

At the Ohio Safety Congress & Expo this week, Stephanie Lynch, PhD, CIH, CSP, Regulatory and Standards Director at OHD, presented on “The Global State of Respiratory Protection.”

Her session explored how respiratory protection standards and practices are evolving worldwide, and why robust programs, including proper respirator fit testing, remain essential for protecting today’s workforce.

We’re proud to see OHD contributing to conversations that help safety and industrial hygiene professionals stay informed, compliant, and confident in their respiratory protection programs.

Thank you to everyone who attended and contributed to the conversation!

We’re excited to be at the Ohio Safety Congress & Expo (OSC26) today in Columbus!Our Southeastern Regional Sales Manager...
03/11/2026

We’re excited to be at the Ohio Safety Congress & Expo (OSC26) today in Columbus!

Our Southeastern Regional Sales Manager, Joshua Pilgreen, is on the ground connecting with safety professionals and giving live demos of technologies you can explore at our booth:

- QuantiFit2: our CNP fit testing instrument for elastomeric respirators
- AeroFit: our CNC fit testing solution for both disposable and elastomeric respirators
- Gilian air sampling pumps and calibrators
- SVANTEK noise and vibration monitoring equipment

If you’re attending OSC26, stop by booth #612 and say hello!

You won’t want to miss this conversation.  Join Stephanie Lynch, PhD, CIH, CSP (OHD's Regulatory and Standards Director)...
03/09/2026

You won’t want to miss this conversation.

Join Stephanie Lynch, PhD, CIH, CSP (OHD's Regulatory and Standards Director) and Y. Precious Diaz, MPH, MPH (University of Alabama at Birmingham) for a candid conversation about the real challenges women face in respiratory protection, and what's actually working to address them.

We’ll discuss:

🔹 Why traditional respirator design falls short for many women (hint: it's not just about size)
🔹 What’s changed in standards, product design, and fit testing approaches
🔹 Practical strategies for safety professionals managing diverse workforces
Whether you're a safety manager, industrial hygienist, or someone who's spent too much time searching for a respirator that actually fits, this session offers both the science and the solutions.

📅 March 25, 2026 | 1:00 PM CT

👉 Reserve your spot: https://us02web.zoom.us/webinar/register/3017726347813/WN_VLbUwaHeSOacoPKNaDz54g #/registration

Why is respirator fit testing required for some hazardous exposures, but not others that we already know can cause harm?...
03/06/2026

Why is respirator fit testing required for some hazardous exposures, but not others that we already know can cause harm?

Across much of Europe, fit testing requirements focus on specific substances like asbestos or crystalline silica, yet workers are exposed to many other inhalation hazards every day.

Our latest blog explores the growing testing gap in European respiratory protection and why a more consistent, risk-based approach deserves attention.

Read the blog here👇
ohdglobal.com/european-respiratory-protection/

When it comes to respiratory protection, one size has never fit all, but for too long, the industry has acted like it do...
03/04/2026

When it comes to respiratory protection, one size has never fit all, but for too long, the industry has acted like it does. Most respirators are still designed around male facial dimensions, leaving many women cycling through multiple models just to find one that passes a fit test.

Join Stephanie Lynch, PhD, CIH, CSP (OHD's Regulatory and Standards Director) and Y. Precious Diaz, MPH, MPH (University of Alabama at Birmingham) for a candid conversation about the real challenges women face in respiratory protection - and what's actually working to address them.
We'll discuss:

🔹 Why traditional respirator design falls short for many women (hint: it's not just about size)
🔹 What's changed in standards, product design, and fit testing approaches
🔹 Practical strategies for safety professionals managing diverse workforces

Whether you're a safety manager, industrial hygienist, or someone who's spent too much time searching for a respirator that actually fits, this session offers both the science and the solutions.

👉 Register now: https://us02web.zoom.us/webinar/register/3017726347813/WN_VLbUwaHeSOacoPKNaDz54g #/registration

Today is World Hearing Day, a reminder of the importance of protecting our hearing and preventing avoidable hearing loss...
03/03/2026

Today is World Hearing Day, a reminder of the importance of protecting our hearing and preventing avoidable hearing loss. 👂

In the workplace, accurate noise and vibration monitoring is essential for identifying risk, supporting compliance efforts, and building effective hearing conservation programs. When you can measure it, you can manage it.

SVANTEK’s sound and vibration meters provide the data safety professionals need to make informed decisions and protect their workforce with confidence.

Learn more about SVANTEK solutions here: https://ohdglobal.com/product/svantek/

LAST CHANCE TO REGISTERTomorrow we are hosting a live webinar as we introduce the Gilian Dustlight Personal Dust Monitor...
03/02/2026

LAST CHANCE TO REGISTER

Tomorrow we are hosting a live webinar as we introduce the Gilian Dustlight Personal Dust Monitor, a wearable instrument that gives workers immediate, visual feedback on dust levels through an intuitive traffic light system.

📅 March 3, 2026
⏰ 1:00 PM CST

Dylan Staack, OHD’s Technical Applications & Partnership Director, will cover:
- Real-world scenarios where seeing exposure in real time changes decisions on the job
- How professionals are using wearable monitoring alongside traditional gravimetric sampling
- What to consider when deploying personal monitors in the field

Whether you’re strengthening a sampling program or exploring proactive dust monitoring, this session will help clarify where real-time visibility fits, and why it matters.

Reserve your seat now.
👉https://us02web.zoom.us/webinar/register/4717701330619/WN_8am9q2ezQuS2WUL95JKIAg #/registration

That’s a wrap on SICUR 2026 in Madrid!Our European Business Development Manager, Adam Marczak, joined our partner Casell...
02/27/2026

That’s a wrap on SICUR 2026 in Madrid!

Our European Business Development Manager, Adam Marczak, joined our partner Casella España S.A. this week as OHD respirator fit testing solutions were showcased at one of Spain’s largest security and safety exhibitions.

SICUR brings together leaders in public and private security, and we’re proud to support organizations focused on strengthening compliance and protecting their workforce.

Missed us at the show? Let’s connect.

This week, we had the opportunity to attend the CCAI Winter Training Seminar in California.Dylan Staack, OHD’s Technical...
02/26/2026

This week, we had the opportunity to attend the CCAI Winter Training Seminar in California.

Dylan Staack, OHD’s Technical Applications & Partnership Director, was on-site connecting with fire investigation professionals and demonstrating the ION Science gas detection technology, along with our AeroFit and QuantiFit2 respirator fit testing instruments.

Thank you to the California Conference of Arson Investigators for the opportunity to connect. We value the conversations and look forward to continuing to support your teams.

We’re proud to recognize Air-Met Scientific as OHD’s International Distributor of the Year.OHD CEO, Luke Allen, had the ...
02/23/2026

We’re proud to recognize Air-Met Scientific as OHD’s International Distributor of the Year.

OHD CEO, Luke Allen, had the honor of presenting this award in person following an exceptional year of partnership and growth in 2025. Since 2020, Air-Met and OHD have worked side by side with a shared purpose: protecting the health of the world’s workforce through trusted, quantitative respirator fit testing solutions.

This recognition reflects more than strong results. It represents collaboration across sales, marketing, technical support, and service, and a commitment to delivering practical solutions customers can rely on.

Thank you to the entire Air-Met Scientific team, including Andrew Marom, Peter Shiels, Shane Lenton, and everyone behind the scenes who continues to advance respiratory protection across Australia.

We value the partnership. We respect the work. And we look forward to what we’ll build together next.

If you’re used to CNC fit testing, you’re probably used to the noise.The constant hum.The background distraction.The fat...
02/17/2026

If you’re used to CNC fit testing, you’re probably used to the noise.
The constant hum.
The background distraction.
The fatigue that builds over long testing days.

AeroFit changes that.

With silent operation, AeroFit makes fit testing calmer, more focused, and—dare we say—more pleasant. Less noise. Less distraction. Just a better experience for the person running the test and the person being tested.

Welcome to a quieter era of quantitative fit testing.

Ready to experience it for yourself?
👉 Get a Quote: ohdglobal.com/quote/

Join us as we introduce the Gilian Dustlight Personal Dust Monitor, a wearable tool designed to give workers immediate, ...
02/12/2026

Join us as we introduce the Gilian Dustlight Personal Dust Monitor, a wearable tool designed to give workers immediate, visual feedback on dust levels using an intuitive traffic light system.

🔹 Date: March 3, 2026
🔹 Time: 1:00 PM Central

In this FREE webinar, we’ll walk through real-world scenarios where seeing dust exposure in real time changes decisions on the job, how professionals are using wearable monitoring alongside traditional gravimetric sampling, and what to consider when deploying personal monitors in the field.

Whether you’re an industrial hygienist strengthening a sampling program or a safety manager exploring proactive dust monitoring, this session will help clarify where real-time visibility fits—and why it matters.

Secure your spot now!
👉 Register here: https://us02web.zoom.us/webinar/register/4717701330619/WN_8am9q2ezQuS2WUL95JKIAg #/registration

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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.