Services & Calibration

Maintaining your equipment to the highest standards

OHD offers on-going service, support, and calibration on equipment sold. This includes annual calibration for the OHD FitTester 3000, Quantifit, doseBadges, and sound level meters. On-site calibration is available for most brands of audiometers. All parts, accessories, and supplies are available through OHD.

OHD is one of only four Service and Calibration Centers worldwide for the Cirrus Research plc doseBadge Noise Dosimeter and we can offer you a complete range of service, calibration and upgrade options for this unique product. Please contact us for more information.

Returning your equipment for service

Please complete our Service Return Form when shipping your equipment back to OHD. Click here for Frequently Asked Questions.

Because of the delicate nature of some of the equipment that is returned to OHD, we would recommend that you pack your instruments carefully to prevent damage in transit.

We would be happy to offer advice as to the best method of shipping and packing. If you have any questions, please contact us and we will be pleased to help.

Audiometer Calibration

OHD offers in-house or on-site audiometer calibrations for Benson audiometers.

OHD also offers the following audiometer-related services:

  • Calibration of sound booths 
  • Acoustic analysis 
  • New equipment demonstrations for Benson Medical Instruments 
  • Training

In OHD’s commitment to selling and servicing the best products available for occupational health needs, we have partnered with Benson Medical Instruments and we are their exclusive dealer for the southeastern United States (Alabama, Tennessee, Georgia and Florida). Benson Medical audiometers are software/computer-controlled. Since their audiometers utilize the computer, Benson can offer features that their competitors have never considered. Benson has quickly established themselves as the innovative leader for hearing conservation professionals. 

Please use the Service Return Form when shipping your audiometer in for calibration.

Quantifit & FitTester 3000 Calibration

The Quantifit and Fit Tester 3000 instruments are calibrated to an NIST traceable standard. These are the only quantitative fit test instruments that are calibrated to an NIST traceable standard.  Calibrating the Quantifit and Fit Tester 3000 on an annual basis can help establish your good faith concerns for employee health and safety.

Software Downloads

You will find the latest versions of all product software here