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Monitoring System

Cyanide Analyzer for Industrial Water Treatment

| Editor: Ahlam Rais

The S80’s CN ion electrode is a combination electrode with a silver cyanide/silver sulfide solid-state pressed crystal sensing element and a double junction reference electrode.
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The S80’s CN ion electrode is a combination electrode with a silver cyanide/silver sulfide solid-state pressed crystal sensing element and a double junction reference electrode. (Source: Electro-Chemical Devices)

Engineers responsible for cyanide-based processes and plants will find that the advanced S80-T80 Cyanide Analyzer Monitoring System from Electro-Chemical Devices supports efficient treatment and ensures that cyanide levels in wastewater effluent are compliant with local, state and federal regulations.

The ECD S80-T80 Cyanide Analyzer Monitoring System features an S80 Pion Cyanide Sensor and a dual-channel T80 Transmitter. This ECD CN Analyzer solution helps plants achieve a more cost-effective cyanide removal water treatment system, which ensures wastewater is treated to meet U.S. EPA regulatory requirements prior to effluent discharge.

The S80’s CN ion electrode is a combination electrode with a silver cyanide/silver sulfide (AgCN/AgS) solid-state pressed crystal sensing element and a double junction reference electrode. The CN ion selective electrode cartridge develops a millivolt potential proportional to the concentration of free CN ions in the measured solution. The typical output is 54 mV to 60 mV per decade of change in concentration.

The speed of sensor response varies from a few seconds in concentrated solutions up to a few minutes in the lower ppm ranges. The CN ion sensors are used with the Model T80 Transmitter with its dual channel mix and match capabilities. This analyzer measures CN from 0.2 ppm to 260 ppm and auto-ranges the display between the ppb and ppm scales.

The S80 Sensors come in immersion or insertion packages that are designed with a 0.75-inch MNPT compression fitting as the process connection. This design employs a variable insertion length to accommodate installation in pipe tees, flow cells or through tank walls. The retractable configuration is designed with a 1-inch MNPT ball valve, a 1-x-0.75 inch reducer and a 0.75 inch MNPT compression fitting to provide the process connection.

The S80 CN Sensor is designed for used with the highly intelligent T80 Universal Transmitter, which is a single channel device designed for the continuous measurement of multiple parameters in a general-purpose industrial environment. It communicates with any pre-calibrated S80 Sensor and automatically configures the transmitter’s menus and display screens to the measured parameter. With the T80’s auto configuration capability to any of the available sensor measurements, there is no longer any need to inventory multiple instrument types, saving time and reducing plant operating costs.

The T80 Universal Transmitter is flexible and user-friendly. It offers membrane switch navigation, a simple menu structure with soft key menu choices and an easy-to-read 2.75-x-1.5-inch LCD display. It is available with a 4-20 mA output with Modbus RTU on 24 VDC and 110/220 VAC instruments. The T80 Transmitter also can be configured with an optional Hart 7 communications and an optional three alarm relay.

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