SMS-22 Sulfide Ion Analyzer

The ECD SMS-22 Sulfide Ion Analyzer is an all in one sulfide ion analyzer for the continuous measurement of sulfide ions in aqueous media. Sulfide is present in well water, municipal wastewater and waste waters from refineries, tanneries, chemical plants, and paper and pulp facilities.
The ECD SMS-22 Sulfide Ion Analyzer uses a sulfide ion selective electrode (ISE) to measure the total amount of sulfide present in the sample. The measurement must be made at high pH levels where S-2 exists. Potassium hydroxide (KOH) is added to raise the pH of the sample to around pH 13 and a pH electrode measures the actual pH. Sulfide and bisulfide exist in a pH dependent equilibrium with the ratio of each dependent on the pH. The sulfide Ion Analyzer measures the sulfide present in the sample and the pH measurement infers what percentage of the total sulfide was measured. The C22 calculates and displays the Total sulfide present.

1. Compact All in One Measurement System, the sulfide ion analyzer conditions the sample, measures the sulfide, neutralizes the sample, measures the pH, drains and rinses the cell.

2. ISE based Sulfide Ion Measurement provides a wide measurement range, 20 ppb to 500 ppm using economical, easily replaceable electrode cartridges

3. pH Adjusted and Compensated Measurement the sample is optimized for the sulfide ion that only exists at high pH values

4. Sample Neutralized After Measurement the highly caustic sample pH is reduced to a safe level near pH 8

5. Automated Sequential Sampling The Model C22 of the sulfide ion analyzer controls the sequential sampling with a combination of relays and timers. Sampling times are easily adjustable from 2 samples per hour to 10 samples per hour.

6. Low Reagent Consumption Less than 2 gallons per month of 10% KOH and an equivalent amount of HCl at 10 samples per hour or 5 months at 2 samples per hour for the sulfide ion analyzer.

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