K-7404 Ozone

Dissolved Ozone Testing Visual Kit is designed to measure ozone from 0-0.6ppm and 0.6-3.0ppm

Replacement ampoules for the K-7404 Test Kit can be found here.

Ozone Information

10 In Stock

Why Choose CHEMetrics Chemets kits?

CHEMetrics Chemets self-filing reagent ampoules are a great way to test for dissolved substances in liquids. These visual test kits allow you to obtain results by measuring the color of the sample according to the color comparators provided with the kit. This unique method allows you to attain results quickly and accurately with minimal contact with potentially hazardous materials.


Safe and Reliable Results:

While traditional methods often require multiple steps and thorough preparation, these test kits allow you to obtain dependable results with a few simple steps. By simplifying the testing method, Chemets test kits reduce the potential for operator error. Additionally, each of the ampoules contained in the test kits is vacuum sealed which helps eliminate the problem of obtaining inaccurate results from stale or unstable reagents. These reagents are stored right in the tip of each ampoule and sealed in glass, thereby minimizing direct contact with the chemicals.

Interference Information:

Various oxidizing agents, including halogens (chlorine, bromine, iodine), chloramines and peracetic acid, and various halogenating agents will react with the chemistry to cause false high test results. 

Test kits are not applicable for the analysis of seawater. 

Please see Technical Data Sheet for other factors. 

What's included:

     -30 self-filling Ampoules

     -Low and high-range comparators 

     -1 25 mL Sample Cup

     -Activator Solution

     -Instruction Manual




The K-7404 CHEMets Visual Kit is a 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-phenylenediamine) to form a pink color.

1. Add 5 drops of Activator Solution to the empty sample cup. Fill the sample cup to the 25 mL mark with the sample to be tested being careful to minimize turbulence. 2. Immediately place the ampoule tip-first into the sample cup. Snap the tip and the ampoule will automatically fill.
3. To mix the ampoule, tilt it from side to side, allowing the bubble to travel from end to end. 4. Dry the ampoule and wait 1 minute for color development.
5. Place the ampoule into the center of the round comparator and hold it toward a source of light, viewing from the bottom. Rotate the comparator until the color below the ampoule shows the closest match. 6. For higher concentrations, use flat comparator. Place the ampoule between the color standards, moving it along the comparator until you can determine the closest match.

For more detailed instructions, see the link at the bottom of the page.


More CHEMetrics Kits for Ozone:

Product Number Method   Range
k7433 Indigo   0-0.75 ppm
I2022 Indigo   0-0.75 ppm
K7423 DPD   0-5.00 ppm
I2019 DPD   0-5.00 ppm
Chemets Kits
Product Number Method MDL Range
K7404 DPD 0.025ppm 0-0.6 & 0.6-3ppm




K-7404/R7404 Instructions

Safety Data Sheet

Ozone Information

Technical Data Sheet


More Information
Manufacturer CHEMetrics
Quickbooks Stock Level 10.000000
Call For Price No
Gas Ozone (O3)
Listing Description

Low-cost, manual test kit to visually indicate ozone levels in water up to 3.0 ppm, color comparator method.

4-20 mA Output No
Voltage Output None
Power Requirements None
Datalogging No
Warranty 1 Year
Range 0 - 3.0 ppm
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