The amount of dissolved ozone (DO3) in water can be measured in ppm ozone with a chemical test kit (colour comparison) or with an electronic monitor.
With the test kit one takes a sample, adds a reagent and compares the colour of the sampe against a reference colour chart. The result is usually difficult to read and therefore not accurate.
The electronic types provide a direct digital reading, are very accurate but more expensive. We supply a wide range of electronic sensors (analog or digital) and monitor/controlers.
Alternatively an ORP (or REDOX) monitor can provide an indication of the ozone concentration in water.
It measures the total level of oxidants in mV (milli Volts) in the water. With the aid of a conversion chart the ORP reading can be converted to the dissolved ozone level.
Disinfection of potable water is considered at 650 mV and above.
These instruments use ozone sensitive gas sensors and are typically used in area's where high concentration ozone generators are operating.