R-7404 Ozone

Dissolved Ozone Testing Visual Kit - Measure ozone 0-0.6ppm & 0.6-3.0ppm

*Use with the K-7404*

Ozone Information


The R-7404 CHEMets Visual Ampoules Kit contains 30 additional ampoules to perform testing of the dissolved ozone level.  R-7404 Ampoules are used with the K-7404 which is a visual indicator of the ppm of ozone. The R-7404 comes in a nice box that can easily be stored in case of the K-7404.

The cost per test is $0.89.

The K-7404 CHEMets 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.


What's included:

  • R-7404 Ozone Visual Refill (30 test)
  • Instruction manual


How to use the K-7404 with the R-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 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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