About

About OHD OHD specializes in Occupational Health, Safety, and Industrial Hygiene solutions to protect the health of first responders and manage occupational risks. Trusted by over 90% of the nation’s largest fire departments, the QuantiFit2™ Respirator Fit Tester is the premier choice for ensuring the safety of SCBA and elastomeric respirators. Its unmatched accuracy and consumable-free testing process make it the gold standard for fit testing in the fire service. For departments testing both elastomeric and disposable respirators, the new AeroFit™ Respirator Fit Tester provides versatility and the industry-leading user-experience you have come to expect from OHD. Together, these solutions empower fire departments to stay compliant and prioritize the health and safety of their teams with confidence. With industry-leading technical support and a commitment to excellence, OHD is your trusted partner in ensuring first responders are always prepared to protect and serve. OHD leads the industry as the only provider of both OSHA- and ISO-recognized quantitative respirator fit testing technologies - QuantiFit2™ and AeroFit®. Trusted by over 90% of the nation's largest departments, QuantiFit2 is the best solution for SCBA/elastomeric respirators. AeroFit is best for departments who also fit test disposable masks. OHD specializes in Occupational Health, Safety, and Industrial Hygiene solutions to protect the health of first responders and manage occupational risks. Trusted by over 90% of the nation’s largest fire departments, the QuantiFit2™ Respirator Fit Tester is the premier choice for ensuring the safety of SCBA and elastomeric respirators. Its unmatched accuracy and consumable-free testing process make it the gold standard for fit testing in the fire service. For departments testing both elastomeric and disposable respirators, the new AeroFit™ Respirator Fit Tester provides versatility and the industry-leading user-experience you have come to expect from OHD. Together, these solutions empower fire departments to stay compliant and prioritize the health and safety of their teams with confidence. With industry-leading technical support and a commitment to excellence, OHD is your trusted partner in ensuring first responders are always prepared to protect and serve.