Hi Kamal,

In dollars, here is the range according to the type of generator.

http://www.alibaba.com/showroom/ozone-generator-price.html

Cheers,

Frank

Cost range can vary from $195 - $10,000.  Price range will depend upon quality and capabilities.  If high ozone concentration is not important, and it is a one-time, or short-term test, the lower end ozone generators would work fine. 

If higher ozone concentrations are important, and/or long-term use is required, I would suggest looking at a higher-end ozone generator than the bottom of the market.

Also, keep in mind if ozone must be dissolved into liquid, ozone solubility should be considered.  Higher ozone concentrations = higher ozone solubility.  See link below for details:

http://www.oxidationtech.com/ozone/solubility.html

For ideas on ozone generators, see below:

Low-end $195 ozone generator - http://www.oxidationtech.com/products/ozone-generators/o3/1knt.html

Medium range ozone generator - good ozone concentration and great longevity - http://www.oxidationtech.com/products/ozone-generators/o3/htu500.html

High concentration ozone generator for best results - http://www.oxidationtech.com/products/ozone-generators/o3/atl-30.html

http://www.oxidationtech.com/ozone/solubility.html

http://www.oxidationtech.com/products/ozone-generators/o3/atl-30.html

http://www.oxidationtech.com/products/ozone-generators/o3/htu500.html

http://www.oxidationtech.com/products/ozone-generators/o3/1knt.html

The very basic ones you can find on sites like aliexpress, starting from usd 20.

We have one installed on a simple timer running for 15 minutes at night.