These systems come with catalytic or electrochemical sensors to monitor for methane, chlorine, hydrogen sulfide and oxygen deficiency. They have a stand-alone design with built-in alarms and relays, automatic zero and span calibration, standard 4-20mA and RS485 Modbus digital ports, remote access and adjustment features, and a full-featured display with status indicators. They are made for monitoring pump rooms, screen chambers, wet wells, grit pump and wash areas, chlorine storage and metering area, and other work areas in wastewater treatment plants.
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