ECD Model S10 S17Electro-Chemical Devices’ (ECD) sulfide-resistant Models S10 and S17 Analytical pH Sensors are used for monitoring sour water containing Hydrogen Sulfide (H2S) compounds in oil/gas refineries. They monitor pH in water-based solutions. The S10 and S17’s Model 20005130 replaceable cartridge electrode features a pH range of 0 to 14 at temperatures from -5 to 130 C and withstands pressures up to 300 PSI at 25 C. It has been tested to sulfide ion concentrations of up to 25 PPM. The S10 and S17 product line consists of two different sensor designs and replaceable electrode cartridges. The S10 sensor is an immersion- or an insertion-style sensor, and the S17 is a valve-retractable style sensor. They are fully re-buildable and feature a 316 stainless steel body that incorporates the sensing cartridge, a temperature module, and a signal conditioner with cabling. These cartridges are designed to provide specific solutions for the measurement of pH, ORP, specific ion (pION), dissolved oxygen, conductivity, and resistivity in a range of industrial process applications. –