A health inspector using QT-40 test strips compared their results to a customer using our QAC QR5 test strips, and the results were the same. The strips, however, are different in color and appearance. So, what is the difference?

Our QAC QR5 uses a different formula from the other strips, but should react about the same. We calibrate our colors using an industry leader  Quat formula and in most cases, but not all, the strips will work with chemicals that are similar.