Free Chlorine Test Kit, Low Range, 1 drop = 0.2PPM or 0.5PPM, FAS-DPD Method

Cannon Water Technology Inc.

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FAS-DPD Method, Free Chlorine Test Kit, Low Range, 0.2 PPM or 0.5 PPM Per Drop, 25 ML Sample

This easy to use titration test kit is used to measure the residual free chlorine available in the water sample. This free chlorine test kit is widely used to measure the CL2 level in drinking water for proper sanitation and control of bacteria, iron, hydrogen sulfide and other species that react with free chlorine. Typical control ranges of free chlorine in water are 0.2 PPM to 2.0 PPM where about 0.5 PPM is a good target to aim for when maintaining a water system. 

EndPoint ID test kits are packaged in a durable plastic case and include all reagents, equipment and instruction card to complete approximately 60-75 tests. Color coded reagent caps match the color bar on the instruction card for easy identification when running multiple tests and our photographic, step-by-step instructions keep testing simple and help users easily identify color changes. 


  • Drinking water systems
  • Food and Beverage
  • Water Treatment
  • Iron Control
  • Hydrogen Sulfide Control
  • Water Sanitation
  • Water Disinfection
  • Well Water Chlorination

The FAS DPD method of chlorine testing is widely accepted as one of the best CL2 water testing methods available today. DPD powder reagent is added to the water sample until the sample turns pink. Ferrous ammonium sulfate reagent is added to the sample until it turns clear. Count each drop until you see the color change and multiple by either .2 or .5 per drop to get your result.  

DPD stands for N,N-diethyl-p-phenylenediamine

Note: This test can also be used to measure bromine residual. Just multiple your result by 2.25 to get your bromine residual test. 


To Reorder items for the kit Please Call 916-315-2691

  • For DPD Powder: 
  • For Ferrous Ammonium Sulfate: 
  • For Sample Vial: