Electro-Chemical Devices” S10 and S17 ORP Sensors feature a no-glass design with platinum or gold sensor tips to operate safely in a range of the most demanding applications. ECD’s ORP S10 and S17 Sensors come with easily replaceable ORP cartridges that plug into a rugged 316 stainless steel body, which incorporates the sensing element, a temperature module and a signal conditioner with cabling. The S10 is an immersion or insertion-style sensor, and the S17 is a valve retractable style sensor. ECD’s ORP electrode cartridge features PEEK (polyetheretheketone) construction and measures from -2,000 millivolts to 2,000 millivolts over a temperature range of 23 F to 176 F (-5 C to 80 C). The ORP sensors are available with the SENTINEL option to monitor the reference electrode potential and display measurement drift graphically and/or with a 4-20 mA output, providing a predictive maintenance alert before reference electrode degradation causes problems to occur.