I designed and built an ozone "Canon". It is actually a simple contraption that works exceptionally well. A friend borrowed the canon to place inside one of the burnt out cabins in the hold of a cargo ship. A week later the burnt smell was removed from this cabin and the cabin was repainted. We are still using derivatives of this original canon in our plant today, also for airborne odours. Our fermenters vent to atmosphere and sometimes the prevailing winds cause the emmision odour to travel to "nose sensitive" neighbours. The ozone canon is piped into the vent lines and effectively nullify the odour, but sometimes all the ozone is not used up by the odour formers and the same neighbours then complain of the strong "clean air" smell. My question here is, how do i measure the volume of ozone generated, other than using very expensive metering instruments? I was trying to equate the ozone volume to the enrgy used, but needless to say only ended up with destroyed meters.