Healthier Workplaces, A Healthier World


Your Fit Testing and Noise Monitoring Experts


OHD specializes in the instrumentation to help protect your employees’ health and manage your occupational risks. From respirator fit testing to noise and vibration monitoring, we have you covered. The Revolutionary OHD QuantiFit2TM Respirator Fit Tester continues to provide accurate and reliable, OSHA compliant respirator fit testing in under 2 minutes and allows fit testing in any environment with no consumables. Our scientifically proven and patented Controlled Negative Pressure technology directly measures respirator leakage, using air as the challenge agent to fit test your respirator anytime, anywhere. Our upgraded user experience with optional battery power opens the door to where you can test while a color touchscreen with animated guidance clearly walks users through a fit test while Bluetooth operation and AutoStart functionality allow for plenty of space between you and your users and touch free operation. All of this along with an industry first lifetime powertrain warranty allows for an easy choice when it comes to enhancing your respirator fit testing program.

OHD is now proud to be the sole distributor for the Svantek line of noise and vibration monitoring tools in the United States. With 30+ years of experience, Svantek has established itself as one the leading innovators with a global reputation for producing some of the most accurate and reliable instruments on the market. Their line of personal dosimeters have endless options including Bluetooth capabilities, auto-calibration as well as an intrinsically safe option. The area sound level meter line has Class 1 and 2 options with broadband results, 1/1 octave band analysis and a wide frequency range up to 10 KhZ. The innovative environmental noise monitoring stations are dedicated for automated noise monitoring which integrates a class 1 sound level meter with 4G and GPS modems. Lastly, allow Svantek’s Vibration line of equipment to assist you with all applications that require simultaneous class 1 sound and vibration assessment thru their independent 4-channel configuration.

OHD and Svantek offer cutting edge functionality and usability to take your respirator fit testing and noise monitoring to the next level. Let us assist you today!


  • QuantiFIt2 Respirator Fit Tester

    The OHD QuantiFit2 is a highly specialized instrument that utilizes OHD’s scientifically proven and patented Controlled Negative Pressure (CNP) technology to directly measure respirator leakage. This innovative technology performs the fastest, easiest, and most precise respirator fit test available, ensuring the best fit and protection for you and your employees.

    Take your fit testing to new places, even outside. QuantiFit2 battery packs allow for cordless operation, animations guide the user through each exercise, and AutoStart allows for touchless testing.

    Break free from traditional fit testing restraints. 

    QuantiFIt2 Respirator Fit Tester