21 Controllers & Sensors According to Faraday’s Law the voltage induced by the magmeter is proportional to the velocity of the conductor fluid. In the SFWE magmeter the physical principle at work is electromagnetic induction. < Low cost solution with high flow system accuracy < No pressure drop making it ideal for gravity flows < Reduced dependence on flow, substances and film-forming media < Magmeter without moving parts for measurement of conductive and homogeneous dirty media The paddle wheel sensor consists of a freely rotating wheel with magnets which is perpendicular to the flow. As the magnets in the blades spin past the Hall sensor, a frequency and voltage signal which is proportional to the flow rate is generated. FW The sensor contains a platinum and a copper electrode.With the sample water acting as the electrolyte, galvanic potential develops between the two electrodes. With stable conditions of pH and water flow, the sensor current increases proportionally to the free chlorine content. < Different membranes available to measure range of chlorine ions < Only 30 seconds to achieve an accurate reading < Reduced dependence on flow, substances and film-forming media < Wide range of measure up to 200 ppm < Complete collection range of parameter measure as: Chlroine, Peracetic acid, Ozone, Bromine, Peroxide The standard potentiostatic and amperometric probe design consists of two electrodes (anode and cathode) that measure a change in current caused by the chemical reduction of hypochlorous acid at the cathode. The current that flows because of this reduction is proportional to the chlorine concentration. CL Their dual pulsed light beam system compensates for drift from any optical components, while digitized signals inside the probe body reduce the possibility of electrical interference in the signal transmission. < Measurement is performed by using a 90° scattered light method compliant with ISO 7027 / EN 27027 < Medium is in direct contact with the sensors to make the unit virtually independent from humidity and condensate water < No need to replace silica gel for easier and cheaper maintenance Turbidity and Suspend Solid is the cloudiness of a fluid caused by large numbers of individual particles. SEKO’s probes are used to determine high and very high concentrations of suspended solids up to 150g/L. They offer reliable measurement thanks to an infrared optical measurement at 880 nm. TB