Historically, user seal checks have been performed qualitatively by pressing the hands into the filters, inhaling slightly and holding a breath to see if the user can detect any leakage into the mask.
The QuantiCheck is the first quantitative user seal check device. The user engages the QuantiCheck, takes a comfortable breath and holds. At the lowest point of the negative pull, the system starts a calculation which is a proprietary algorithm that measures pressure loss from the respirator.
The QuantiCheck® was designed to allow you to go above and beyond the set subjective standards for a user seal check. Test your mask every day. Be better than compliant.