Quantitative respirator fit testing is a practice that begins in the 1960’s. While there are several ways to perform a respirator fit test, none were supported by scientific evidence that these methods actually worked until 1992. That’s when the idea of Controlled Negative Pressure (CNP) was used in a whole new way of fit testing. This revolutionary approach to respirator fit testing could be subjected to scientific scrutiny.
The key to measuring respirator fit is an accurate measure of respirator leakage. Unlike all other previous methods of fit testing, Controlled Negative Pressure proved dependable. Accepted by OSHA in 1998, CNP technology was adopted by industry to be the quickest and most accurate way to perform fit testing- becoming the gold standard in respirator fit testing.
The OHD Quantifit offers an impressive array of advantages that can dramatically improve your respirator program. Within ten seconds, you know whether the user has a basic fit or not. And the OSHA accepted CNP Redon protocol takes as little as two to three minutes. If other quantitative fit test instruments measured accuracies of less than 40%, why put your employees at risk? Controlled negative pressure has proven to be the fastest, most accurate, and most health protective fit test system available.