This Chlorine Test Paper provides a simple, reliable, and economical means to measure the concentration of chlorine in sanitizing solutions. The Chlorine Test Paper measures total available chlorine from 10-200ppm and gives results in just seconds. Our chlorine test paper is most often used to test the strength of solutions used to sanitize surfaces, for example, in the restaurant industry. In these types of applications, bleach is usually used to generate the available chlorine.
Doses of chlorine should be sufficient so as to leave a residue of 0.2 mg / l or 0.2 ppm after 10 minutes of the contact period.
The strip will darken over time, so it is best to compare to the color chart as directed. In addition, if two strips are stuck together, the color will be darker. Lastly, if you lay the strip against the vial when comparing to the color chart, it will also darken the color. The color chart was created by holding a strip in the air next to the vial.