Ozone Generator High Concentration Monitors
The output of an ozone generator can vary from 2-12% by weight ozone. Knowing the concentration of the ozone and
the flow rate of the gas will determine the output of the ozone generator. This information can be used to control the
overall ozone water treatment process and follow the performance of the ozone generator. These devices, however, are
quite expensive ($5,000 to $10,000) and usually only make sense in applications where knowing the concentration of
ozone in the gas stream is critical or in larger systems where the cost of these instruments is small in comparison to the
overall system price. There are other less expensive ways to estimate the ozone generator output, but they are not as
accurate and do not work in real time.
High concentration monitors work by measuring the amount of ozone per unit volume of gas (g/Nm3). This is typically
done by taking a small side stream of the gas and measuring the concentration of this side stream as representative of
the main flow. Usually a very good assumption if the system is set-up properly. UV as 254 nm can detect ozone, but
does not read oxygen or air. The photometer measures the ozone in the gas stream against a control volume with no
ozone. Accuracy is quite high for these systems in the range +/- 1-2%.
Ozone generator manufacturers use such devices to check the performance of their machines prior to shipment. The
machines are then shipped with a performance curve that shows ozone generator output as a function of inlet gas flow
rate and power setting. A well made machine should conform to these curves and thus minimizes the need for the high
concentration monitor. The monitor in this case would either provide a more accurate assessment of the generator
performance in real time or serve as a trouble shooting tool.
The performance of the overall system can also be followed by noting the concentration of ozone in the water to be
treated. The ozone water treatment system should have been designed on the basis of a certain ozone output from the
generator, ozone demand of the water and transfer efficiency of the mixing system. For larger systems, this would be
done via a pilot process. Assuming the water quality has not changed, measurements of dissolved ozone should indicate
that the generator is providing sufficient ozone to the process.
An emerging technology for measuring ozone employs ultrasonics. These systems utilizes the dependence of speed of
sound through gas on gas molecular weight. Ozone generators convert some of the gas at their input to Ozone, thus
increasing the molecular weight of the gas. The change in molecular weight of output (Ozone enriched) gas is in direct
proportion to Ozone concentration. These systems may offer a low cost method for monitoring ozone concentration from
ozone generators in the future.
The output of an ozone generator can vary from 2-12% by weight ozone. Knowing the concentration of the ozone and
the flow rate of the gas will determine the output of the ozone generator. This information can be used to control the
overall ozone water treatment process and follow the performance of the ozone generator. These devices, however, are
quite expensive ($5,000 to $10,000) and usually only make sense in applications where knowing the concentration of
ozone in the gas stream is critical or in larger systems where the cost of these instruments is small in comparison to the
overall system price. There are other less expensive ways to estimate the ozone generator output, but they are not as
accurate and do not work in real time.
High concentration monitors work by measuring the amount of ozone per unit volume of gas (g/Nm3). This is typically
done by taking a small side stream of the gas and measuring the concentration of this side stream as representative of
the main flow. Usually a very good assumption if the system is set-up properly. UV as 254 nm can detect ozone, but
does not read oxygen or air. The photometer measures the ozone in the gas stream against a control volume with no
ozone. Accuracy is quite high for these systems in the range +/- 1-2%.
Ozone generator manufacturers use such devices to check the performance of their machines prior to shipment. The
machines are then shipped with a performance curve that shows ozone generator output as a function of inlet gas flow
rate and power setting. A well made machine should conform to these curves and thus minimizes the need for the high
concentration monitor. The monitor in this case would either provide a more accurate assessment of the generator
performance in real time or serve as a trouble shooting tool.
The performance of the overall system can also be followed by noting the concentration of ozone in the water to be
treated. The ozone water treatment system should have been designed on the basis of a certain ozone output from the
generator, ozone demand of the water and transfer efficiency of the mixing system. For larger systems, this would be
done via a pilot process. Assuming the water quality has not changed, measurements of dissolved ozone should indicate
that the generator is providing sufficient ozone to the process.
An emerging technology for measuring ozone employs ultrasonics. These systems utilizes the dependence of speed of
sound through gas on gas molecular weight. Ozone generators convert some of the gas at their input to Ozone, thus
increasing the molecular weight of the gas. The change in molecular weight of output (Ozone enriched) gas is in direct
proportion to Ozone concentration. These systems may offer a low cost method for monitoring ozone concentration from
ozone generators in the future.
Spartan Environmental Technologies
Air and Water Treatment
Air and Water Treatment
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Spartan Environmental
Technologies, L.L.C.
7383 Lauren J Dr
Mentor, OH 44060
USA
Phone: 800-492-1252
Fax: 440-368-3569
E-mail: info@
spartanwatertreatment.com
Technologies, L.L.C.
7383 Lauren J Dr
Mentor, OH 44060
USA
Phone: 800-492-1252
Fax: 440-368-3569
E-mail: info@
spartanwatertreatment.com