OHD is committed to the research and future development of Respiratory Protection. That is why we have recently partnered with the University of West Virginia and their Department of Industrial and...

OHD has proudly been partnered with the Chicago Fire Department for over 5 years.

What is the relationship between OSHA permissible exposure limits/maximum use concentrations and assigned protection factors?

Have you been waiting for the right time to upgrade your fit tester from the TSI PortaCount® to the revolutionary OHD Quantifit®? Aren't you tired of the inconvenience of sometimes having to ensure...