K-7404 Ozone

Dissolved Ozone Testing Visual Kit

Measure ozone 0-0.6ppm & 0.6-3.0ppm

Ozone Information


The K-7404 CHEMets Visual Kit is visual indicator kit for measuring ozone in water levels from 0-0.6 and 0.6-3.0ppm.  This device uses the DPD Method for testing. Using this method Potassium iodide is added to the sample before analysis.  The Ozone present reacts to the iodide to liberate iodine.  Then the iodine reacts with DPD (N, N-diethy-l-p-phenylendeiamine) to form a pink color.

This is a visual color comparing test kit for inexpensive dissolved ozone measurement. The refill kit R-7404 can be purchased for more tests.

The cost per test is $0.89.


What's included:

  • Low Range Comparator (0-0.6ppm)
  • High Range Comparator (0.6-3.0ppm)
  • R-7404 Ozone Visual Ampoules (30 test)
  • A-7400 Activator Solution
  • 25 mL sample cup
  • Instruction manual


How to use the K-7404:

Instructions for Ozone water testing using the K-7404



  1. To test, add 5 drops of A-7400 Activator Solution to the sample cup.
  2. Fill the 25 mL sample cup with your ozonated water.Fill the sample cup to 25ml
  3. Snap the end/tip of the ampoule in the water on the bottom/side of the 25 mL sample cup.Snap the tip of the ampoule on the bottom and side of the sample cup
  4. Mix the contents of the ampule by tipping back and forth a few times.Tip the vacu-vial back and forth to mix
  5. Dry the ampoule and wait 1 minute for color development.Dry vacu-vial and then insert into the I-2019
  6. Obtain the test result by matching to the corresponding color comparator.
  7. For the low range comparator: Place the ampoule, flat end first, into the comparator.  Hold the comparator up towards a light source and view from the bottom. Rotate the comparator until the best color match is found.



K-7404/R7404 Instructions

Ozone Information

More Information
Manufacturer CHEMetrics
Call For Price No
Gas Ozone (O3)
4-20 mA Output No
Voltage Output None
Power Requirements None
Datalogging No
Warranty 1 Year
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