OHD, LLLP

OHD specializes in the instrumentation and software to help protect your employees' health and manage occupational risks. Our QuantiFit2 Respirator Fit Tester utilizes scientifically proven and patented CNP technology to fit test your respirator any time anywhere, in under 2 minutes. OHD is also the U.S. Master Distributor for Sensidyne / Gilian Air Sampling pumps as well as Svantek Noise Dosimeters, Sound Level Meters, and Vibration Meters. With over 30 years of experience, OHD is your trusted partner for technical solutions.

With full-service calibration and service departments, we serve each client with the excellence and professionalism expected in today's competitive market.