Hydrion QT-40 Quaternary Sanitizer Test Tape 15 feet Roll Quat Color Chart 0-500 ppm Range

This measures the concentration of hypochlorite acid and works well. Only weird thing is it goes by 100s except the first one which is 150 ppm. Seems like it should be 100, but maybe 150 ppm is a level that is required more often. Anyway, works well.

These strips are easy to use. We have been using them for 3 years. We will reorder in the future

Good

does the job

As accurate as always

Test strips do a good job and results read quickly.

works great

realize las pruebas en varios amonios y marca color azul a que se debe?? no marca ninguno de los colores verdes