How to Measure Output of your Ozone Generator

Posted by Joel Leusink on February 28, 2011 under Ozone Generators | 9 Comments to Read

We are commonly asked how to measure output or verify that an Ozone Generator produces the amount of ozone the manufacture claims. This tech sheet will cover how to measure the output of your high concentration Ozone Generator.

hour (g/hr), also known as ozone output. The ozone measurement instrument will read percent by weight (%), or grams per meter cubed (g/m3), also known as ozone concentration. To mathematically determine the g/hr (ozone output) from % by weight, or g/m3 (ozone concentration) you will need to determine the flow rate of the Ozone Generator in liters per minute (LPM). The calculations to use when you have determined the gas flow rate and concentration are below:

From percent by weight using oxygen as a feed gas:

Ozone Output (g/hr) =(( LPM x 0.001) x 60) x(14.3 x % by weight)

From percent by weight using dry air as a feed gas:

Ozone Output (g/hr) =(( LPM x 0.001) x 60) x(12.8 x % by weight)

From g/m3:

Ozone Output (g/hr) = ((LPM x 60) x 0.001) x g/m3

Another resource we offer is a handy online calculator. Just enter your flow and concentration values and we do the work!

Confused about all these units?  Click HERE for an explanation of ozone units.


When using percent by weight to measure ozone concentration, the calculation to determine ozone output is different because the density of the gas is different. Due to the difference in the density of the gas, there are separate conversion formulas used to determine the output of an Ozone Generator (as shown above).

Ozone Measurement Device

A related question is which ozone measurement device should be used to facilitate these measurements. The short answer is, only a high concentration ozone analyzer. Note that the units of measure used are percent by weight and g/m3. This is due to the high concentrations of ozone produced by most Ozone Generators. We are also asked why parts per million (ppm) is not used as a unit of measure. Let me provide a quick example using a very small Ozone Generator.

An Ozone Generator producing 2 g/hr ozone from 10 LPM of air would produce 0.26% ozone concentration.

2 g/hr = ((10 LPM x 0.001) x 60) x (12.8 x 0.26% by weight)

0.26% ozone = 1573 ppm conversion info here

At only 2 g/hr of ozone output the ppm value is already 1573 ppm. The parts per million (ppm) unit of measure is just not conducive to these calculations. Therefore it is rarely, if ever, used when calculating generator output.

The high concentrations that are created limit the number of ozone measurement devices that can be used, which is why the process is restricted to high concentration UV ozone analyzers.

The diagram below shows an example of a system setup to measure the output of an Ozone Generator.

Components Needed:

Other Important Considerations:

When choosing an Ozone Analyzer, ensure that the analyzer you are purchasing operates within the range that you will be operating within. Some Ozone Analyzers are limited to low ranges only, so ensure that you choose a device capable of reading a higher concentration of ozone than you will ever need to measure.

Also ensure that the analyzer you are purchasing will measure ozone concentration using the units of measure that you desire. If choosing an analyzer that measure ozone in percent (%) by weight, be sure to specify whether you are using oxygen or dry air gas. Some analyzers may be only factory configurable and cannot be configured by the user.

Gas flow is a very critical component of the calculations used to measure ozone output. A small deviation in actual flow measurement will result in a large error in the resulting ozone output figure. Since this is such an important value, we recommend using a high quality Mass Flow Meter to measure the total gas flow entering the Ozone Generator. A Mass Flow Meter will measure total gas flow. This measurement is also pressure compensated to eliminate that potential variable. Using the Mass Flow Meter prior to the Ozone Generator will remove the possibility of ozone corroding the delicate components inside the Mass Flow Meter.

Most high concentration Ozone Analyzers will only require a very small gas flow rate. This will require a small flow meter to regulate and measure that gas flow. An advantage of this small flow rate is that the Ozone Analyzer could be used as an on-line measurement device. If the Ozone Generator uses a gas flow rate of 20 LPM and the analyzer will only consume 1 LPM for accurate measurement, this setup only requires a 5% slipstream of the ozone gas.

click here for to view this information on our website and find more information that may be helpful.

For questions on how to measure the output of your ozone generator, or for information on the products you may need contact our application engineers for more information.  We cal also perform in-house testing of ozone generators to provide 3rd party validation for your ozone generator output measurements.

  • Ozone Analyzer For Rent » Ozone Journal said,

    […] The UV-106H is a portable, bench mount Ozone Analyzer that is very easy to use.  This analyzer has many uses, however the most common use we see is to measure the output of an Ozone Generator.  This was described in more detail in a recent journal post. […]

  • IN USA Ozone Analyzer H1-S » Ozone Journal said,

    […] for an analyzer like this would be in-line ozone measurement, or measuring the output of your ozone generator. Tags: ozone analyzer, ozone meter, Ozone […]

  • Ozone Solutions now Calibrates Ozone Analyzers » Ozone Journal said,

    […] more about how an ozone analyzer can be used to verify the output of your ozone generator HERE Tags: ozone analyzer, ozone calibration, ozone detector, ozone meter, ozone monitoring, ozone […]

  • High concentration ozone analyzers at a deep discount » Ozone Journal said,

    […] uses for High concentration Analyzers are measuring output of your ozone generator real time while in operation. Tags: BMT 963, BMT ozone analyzer, high concentration ozone […]

  • Refurbished used ozone analzyers » Ozone Journal said,

    […] IN-USA Mini Hicon Ozone Analyzer is a popular ozone analyzer used to measure output of an industrial ozone generator or in-line to ensure your ozone system is operating as well today as it was when you first […]

  • Sultan Salahuddin said,

    How Ozone Generator is beneficial as a household gadget?

    Shall we use Ozone Generators for our Living rooms, Bed rooms, Hospitals? Whether beneficial or not?

    How it disinfects Fruits, Vegetables, other Food items?

    Shall we drink Ozonized Water? If the Out put of Ozone Generator is 400mg/ h, then what time required to disinfect from Bacteria and Viruses of a room of size: 3mx3mx3m with ventilation?

  • Joel Leusink said,


    In households, small ozone generators are commonly used to produce ozone for odor control or odor removal. While ozone is used industrially for disinfection and antimicrobial intervention it is not widely used for this use in the home.

    I would not recommend drinking aqueous ozone.

  • Boston Ten Point said,

    Love it. Thank a lot for taking the time. I’ll definitely come here to find out more and recommend my coworkers about your posting.

  • shiva said,

    pls where i can find out the ozone gas
    pls let me know
    i am doing project in MTech level project for that i want ozone gas
    here my whats up no 8275759743

Add A Comment