Software for the QuantiFit2(TM) Respirator Fit Tester

OHD Logic Software is to be installed on a PC running Windows software version 10 or greater.
PC requirements:  Processor Speed: 1.0 GHz or greater 
RAM: 1 GB or greater 
Disc Space: 16 GB

The installation must be completed by someone logged onto the PC who has administrative privileges. The installation file will install all prerequisite files including Windows requirements. 

QuantiFit2 Logic Software

Software for the Quantifit® Fit Tester

***If you are moving FitTrack Gold to a Windows 10 computer, please do a backup within FitTrack Gold and save the backup file outside the computer.


FitTrack Gold was released August 19, 2020. You may download the full version, or just the upgrade if you have any older version of FitTrack Gold installed. See what’s new. (This must be installed when logged in as a System Administrator (or Domain Administrator when domain access is required), or it will not install properly. All Windows updates MUST be up to date.)

FitTrack for FitTester 3000 is for our older device, which was replaced by the Quantifit in 2008. For newer software, ease of use, and better features, we recommend that you upgrade to the Quantifit.

If you are having trouble connecting the Quantifit to your computer, please download this driver. 

FitTrack Gold is the newest version of software available for the Quantifit. See the product sheet for more information.


Quantifit (New Computer Installs) - Includes SQL Database

Existing FitTrack Gold Users


Noise Instrumentation

NoiseTools software for Optimus sound level meters and doseBadge Dosimeters

NoiseTools Quick Start Guide

Deaf Defier 3.3. Compatible with Microsoft Windows XP, Vista & Windows 7. Includes drivers for 32bit and 64bit versions of Windows 7.

dBLink3 Compatible with Microsoft Windows XP, Vista & Windows 7. Includes drivers for 32bit and 64bit versions of Windows 7.


WHQL Driver update for RC:110A doseBadge Reader. 32bit & 64bit drivers for use with RC:110A Reader Units manufactured after 1st July 2009

dBLink 3.3.05 (Saint-Gobain)

OHD KoKo Spirometer

For use with the KoKo spirometer when moving the OHD KoKo spirometer to another computer. If your current version is older than 4.11, upgrade fees will apply. Please contact an OHD sales representative.