The AS-500 is a very versatile ozone meter that can be used in many different applications. The sensor can work at pressures from 0 - 30 PSI. This allows the sensor to be used in-line with no extra flow cell!
The AS-500 has a leg-up on other dissolved ozone monitors because of it's rugged no-nonsense sensor probe. It is not a high-precision instrument when compared to some other meters, but most dissolved ozone meters require very tightly controlled water pressure and flow in order to achieve ccuracy whereas the AS-500 does not. The probe can be installed directly into water piping and operate reliably and consistently without being overly sensitive to changes in pressure and flow.
The only replacement parts are the membrane & electrolyte solution.
The AS-500 dissolved ozone monitor is made in the USA.
The electrolyte replacement frequency is not directly dependent on water quality. However, higher dissolved ozone levels in the water will consume the electrolyte faster, poor water quality usually requires higher dissolved ozone levels, therefore the electrolyte would be consumed faster. Water quality normally only affects the life of the membrane cap.
There is no direct relationship of ORP levels to dissolved ozone levels. ORP is measuring the cleanliness of the water, or the oxidation potential of the water. This is usually a measure of the oxygen, or even ozone in the water. So, it is true that there is a correlation of ozone to ORP, however, depending upon water quality this relationship will vary from water to water. Please review the following link for more information: www.ozonesolutions.com/ORP_Ozone.html
Unlike most ambient air ozone monitors which can be sent back to Ozone Solutions for calibration, dissolved ozone monitors should instead be calibrated at the customer site for best results. The industry standard for calibrating dissolved ozone monitors generally accepts chemkits or single analyte meters as valid references to calibrate against. For further detail, refer to our K-7404 or I-2019 products, which are listed on the Dissolved Ozone Monitors page.
This unit has not been tested in saltwater. We think the sensors would not be reliable in that type of application due to high ionic strength/salt concentration and unknown levels of dissolved organics and suspended particles. e.g., membranes clog up easily in some of those conditions. The unit we recommend for saltwater is the DOM-1. The sensing technology in the DOM-1 does not come into contact with the saltwater.
The maximum cable length is 100-ft. The cable is shielded to eliminate EMF interference.
The manufacturer recommends a yearly calibration. The readings of all ozone monitors will start to stray over time and need to be corrected when possible.
The electrolyte solution should be replaced every 3-6 months. The membrane should be replaced every year, or as necessary. This will occur more frequently in water with higher turbidity, TSS or high dissolved ozone levels.
Last Updated: January 19, 2016