Safe Solutions Specific Ion Analyzer for Hazardous Areas

Editor: Ahlam Rais

Designed for demanding hazardous industrial environments, the rugged S88 Specific Ion Sensors and the intelligent X80 Universal Transmitter Analyzer from Electro-Chemical Devices (ECD) are available as Atex and Iecex or FM approved. The solutions provide safe, precise measurement of water-based chemicals for effective process use and effluent treatment prior to re-use or discharge in order to meet water quality standards and regulations.

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Electro-Chemical Devices’ X80 Universal Transmitter Analyzer.
Electro-Chemical Devices’ X80 Universal Transmitter Analyzer.
(Source: Electro-Chemical Devices)

ECD’s S88 Specific Ion Sensors are utilized in a wide range of industrial processes and industrial plants where water-soluble chemicals pose a potential danger to people, equipment and the environment. Their proven, easy-to-replace specific ion electrode cartridge design converts the chemical activity of a specific ion dissolved in a liquid (water) into an electrical potential (Voltage) that is proportional to amount of the ion in the solution.

The sensors monitor and detect ammonia, ammonium, bromide, cadmium, calcium, chloride, copper, cyanide, fluoride, potassium, sodium and sulfide. These chemicals are utilized in many different industries and processes, including petrochemical processing, electronics and semiconductor fabrication, metals and mining, power generation, aquaculture and environmental monitoring.

In addition to the sensors, the versatile S88 Sensor Series can also be configured to measure pH, ORP, dissolved oxygen, conductivity or resistivity. No matter what the measured parameter is, the series sensors convert the analog signals from their electrode cartridge into a digital protocol that allows two-way communication with the X80 Universal Transmitter, states the company.

The identity of each sensor, its measurement parameter type and serial number, are all stored in the sensor’s memory along with three calibration registers. When connected to the Universal Analyzer, the sensor’s digital information is uploaded automatically to the analyzer. This process also configures the displays and outputs of the transmitter to the values

appropriate to the sensor’s measured parameter, adds the firm.

The sensor series is CE approved. These sensors are intrinsically safe and intended for installation in hazardous locations with Zone 0, Ex ia Ga classifications, -20°C < Ta < 85°C, mentions the company. Their electrochemical sensors are housed in a rugged 316 stainless steel cartridge, with other cartridge materials available on request.

For ease of installation, the go-anywhere sensors come in two configurations: (1) insertion style and (2) valve retractable. The insertion sensor uses a 0.75-inch (19.05-mm) MNPT compression fitting as the process connection. This design allows a variable insertion length to accommodate installation in pipe tees, flow cells, or through tank walls. If the fitting is reversed the sensor can be installed in a stand pipe for submersion into a tank, opines the firm.

The valve retractable sensor uses a 1-inch (25.4 mm) ball valve with a 1-inch NPT process connection. Loosening the rear compression fitting allows the sensor to slide freely through the ball valve, but stop at the compression fitting for either insertion into the process or retraction from the process, adds the company. Ball valve retractable instruments conveniently allow sensors to be removed from the process stream without shutting down the process.

The company’s transmitter is designed with a 316 stainless steel housing, which is an FM approved explosion-proof enclosure: Class I, Div 1, Groups B, C and D, Class II, Div 1, Groups E, F and G, Class III, Div 1, Nema 4X, IP66. It is available as either a single- or a dual-channel instrument for continuous measurement with a standard Modbus or optional Hart digital bus communications and three optional alarm relays.

The transmitter features a large (2.75-x-1.5 inch), easily viewable 128-x-64 pixel LCD display with three easily switchable main display screens for data, millivolt and graphics. The display comes with a gray background and black lettering for loop powered instruments or with a blue background and white lettering with LED backlighting on 24 Vdc powered instruments.

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