OHD, Inc. specializes in Occupational Health & Industrial instrumentation and software to help protect your employee's health & manage your occupational risks.  Whether you are looking for the Quantifit® Respirator Fit Tester, Noise Dosimeters, Sound Level Meters, Environmental Noise Monitoring Systems, Spirometers, or Audiometers we can provide you with a complete solution.  With a full service calibration and service department, OHD’s goal is to serve each client with the excellence and professionalism expected by today's competitive market.