EPA-approved test strips to check your water for Free Chlorine. Contains 30 test strips. Fast, accurate, visual results. This test detects Free Chlorine down to 0.05 ppm, without monochloramine interference.
First EPA approved test strip for Free Chlorine on the market! This is ideal for many applications: to test your home water, school projects, food processing environment, and places where you may need to check if you have a correct amount of sanitizer present in water. Packet of 30 strips, no external chemicals are needed to perform water tests. You can test 30 times, or up to 30 different water sources. Tests can be used under various water temperature. This test outperforms older OTO (Orthotolidine) chlorine tests that use drops.
How to Use Chlorine Water Test
1. Dip one test strip into a 50 ml (about 2 oz.) sample of for twenty (20) seconds, with constant back and forth motion that maximizes water flow through an indicator pad.
2. Remove and shake strip once, to remove excess water. Wait for twenty (20) seconds.
3. Match the best color to determine Parts Per Million (ppm) or mg/Liter concentration of Free Chlorine in your water sample.
Use coloring chart provided with the package, or the chart below to check for chlorine levels in water:
If you find that your level of chlorine is 4.0 ppm (parts per million) or above, please dilute water sample (mix half tap water and half distilled water) and repeat a test, until you get a number in the range between 0.1 and 2.5. Then multiply your number by the number of times you had to dilute water.
This test will show Free Chlorine only. Some municipalities and counties use other chemicals for disinfection. Other commonly used checmical is chloramine, which is also called "combined chlorine", a chlorine that is combined with another chemical. Free Chlorine test will not show levels of combined chlorine (chloramines) in water. We have a test available for Free and Total Chlorine, which will test for both Free Chlorine and Chloramines.
Click here for Free and Total Chlorine Test strips
US Patents 5491094 and 6541269.
Product uses ITS method D99-003 (revision 3, Nov.21 2003) in EPA format. For compliance purposes this test must be used in format above.