The Model S80 universal sensors provide a stable and economical platform for the in line measurement of pH, ORP, Specific Ion, Dissolved Oxygen, Conductivity or Resistivity. The Model S80 is an insertion or immersion style sensor for use in pipe Tees or on the end of a Stand Pipe for immersion into a tank or pond. The Model S80 is also available as a valve retractable design allowing insertion or removal of the sensor into a pipe without interrupting the process flow. Both sensor designs use easily replaceable electrode cartridges. ECD offers several ion selective electrode cartridges suitable for continuous online measurement.

The Sulfide Ion Selective Electrode cartridge develops a millivolt potential proportional to the concentration of free sulfide ions in the measured solution. The Sulfide Ion Sensors are used with the Model T80 Transmitter with its dual channel mix and match capabilities. These analyzers will measure free sulfide ions from 0.02 ppm to 32,000 ppm with the pH greater than pH 14. Without pH compensation a 10 % low error will occur at pH13 and 50% low error will occur at pH 12.