SVS AQUA TECHNOLOGIES recommends any of these three methods (analytical, optical or reactive) for measuring the residue of ClO2:
Photometer designed for ClO2 measurement/Electronic ORP Meter
DPD Titration Test kit
Chlorine Dioxide test strips, FlexiMeter, or Comparator Wheel.
The photometry is a method of analysis which is often used. Whether it is a public bathhouse, food and beverage industry, laboratories, or industrial disinfection – are everywhere photometer is used for the determination of concentrations in solutions. We are providing the world’s first photometer for the entire visible color spectrum with only one light source and only one sensor. The unique sensor combined with the several –year’s experience in water analysis, made this innovation possible. In addition, the sensor measures with a hitherto unknown devices with photometer accuracy. The Bluetooth technology (select models) and a programmed specifically for the PC software makes it easy to manage measurement and customer data
Electronic ORP Meter
Without requiring additional reagents (tablets, drops, etc.), the Electronic Meters offer an absolutely professional way to measure various water values; such as, for example, conductivity, salinity (total dissolved solids), and pH value. The established value is displayed on the device within seconds after dipping the device in sample liquid. The sensitive electrodes, however, should always be kept damp. They should be calibrated at regular intervals, preferably before each measurement, by using a reference fluid. Both the batteries and the electrodes can be changed. The working range of the Electronic Meter is between 0 - 50°C; depending on the model temperature can be compensated for by determining the measurement value.
FlexiTester provides you with access to semiprofessional water analysis. While FlexiTesters are visual measurement devices, the arrangement of the measured color to the scale – and the determination of the measurement value – is much more precise with FlexiTesters because the measurement is compared to an ongoing color-scale on a parameter-stick. There are no measurement results “between” individual color scales. 37 different parameter-methods can be tested with the same basic model.
Comparators also provide you with access to professional water analysis. While these comparators are also, like Pooltesters, visual measurement devices, the arrangement of the measured color to the scale – and the determination of the measurement value – is much more precise with comparators because the measurement is compared on a rotating color scale (color disc). there are no measurement results “between” individual color scales. ergonomic design and high quality materials also simplify measurements. By using the adapter that is supplied with each comparator, the sample path-length can be extended and additional ranges can be measured.
Test strips for the measurement of water values are enjoying greater popularity, because they provide a simple and rapid method for quick analysis. When compared to the visual measurements of the Pooltester, there is naturally a significant disadvantage in the size of the colored field and thus in the possibility of making an exact comparison on the color scale. The shelf-life of the Test Strips is substantially less than that of the reagent tablets that are being used in the Pool Testers. Yet this is compensated for by the simplicity of use, the ability to obtain rapid measurements, and optimal pricing.
The Use of Reagents
Reagent tablets offer the highest level of assurance that always the exact amount of reagent needed will be used. Most marketed tablet types, such as DPD for determining Chlorine in water, are regulated by strict international standards aimed at guaranteeing that all tablets with that designation (e.g. DPD 1) can also be used in all designated measurement devices made by any manufacturer. Our devices and reagents can therefore be combined with other manufacturer’s reagents, and this is also true the other way around. One of the questions discussed often is the difference between RAPID and Photometer tablets. Basically both detect the same content but are different in one important point: RAPID tablets contain a material which “bursts” the tablet, e.g. chemical pulp that expands upon contact with water. This “burst material” would, however, disrupt the light ray of the photometer (suspended particles) which is why RAPID tablets should never be used with electronic devices such as photometers.