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Hydrion QT-40 Quaternary Sanitizer Test Tape 15 feet Roll Quat Color Chart 0-500 ppm Range auspowers_batchfive JOY OF ARTS & CRAFTS:Hydrion QT 40 Quaternary Sanitizer Test Tape 15 feet Roll Quat Color Chart 0 500 ppm Range Hydrion QT 40 Quaternary Test Paper provides a simple, reliable, and economical means to measure the concentration of Quaternary Sanitizers, particularly muli quat broad range quaternary ammonium sanitizer solutions. With color matches at 0 150 200 400 500ppm (parts per million), the test paper measures concentrations between 0 500ppm, detecting exhaustion of