The Hydrion QT-10 sanitizer test kit provides the user with a simple, reliable, easy to use test kit, to verify the strength of their sanitizer solutions ensuring compliance with food safety laws. The Hydrion Quaternary Ammonium test kit will also detect exhaustion of solutions, or solutions which are not meeting health and safety requirements.The Hydrion QT-10 Quaternary Test Paper measures the strength of Quaternary Sanitizers: Alkyldimethylbenzyl ammonium compounds; Rocall II, Hyamine 3500. The test paper measures concentrations 0-100-200-300-400 ppm.