Can the DR300 Pocket Colorimeter for Monochloramine and Free Ammonia be used to test for Free Chlorine?

Document ID

Document ID TE12332

Published Date

Published Date 02/18/2020
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Question
Can the DR300 Pocket Colorimeter for Monochloramine and Free Ammonia be used to test for Free Chlorine?
Answer
The DR300 Pocket Colorimeter for Monochloramine and Free Ammonia (Product # LPV445.97.26110) can be used to test for Free Chlorine. This test requires the use of an additional reagent not used for Monochloramine or Free Ammonia, Freechlor F Reagent Solution, 50 mL (Product # 2964926). It works by converting any Free Chlorine in the sample into Monochloramine, then measuring the Monochloramine as Cl2.

The procedure for this test is outlined in this method document: Chlorine, Free, Indophenol Method 10241

There are two differences when using this procedure with the DR300:
  • The monochloramine program is used in place of program 66 outlined in step one of this procedure
  • Use the Blue square button for zero and the green check button for read for steps 11 and 15.

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