ADS Environmental Services FlowAlert QR 775011 A2 - Manual (Page 13)

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C H A P T E R 2
System Overview
The ADS ® FlowAlert

monitor is a data logger and alarm system
that uses up to two devices to measure or detect fluid levels: a
pressure depth sensor and up to two float switches. The pressure
depth sensor is a gauge-type sensor provided by ADS for mounting
in the pipe or on the manhole or vessel wall. The float switch(es) is
suspended in such a way that it becomes buoyant and trips its
internal contact at a predetermined, fixed elevation.
The monitor receives the raw pressure depth data and float state
from the sensor and float, respectively, based on a defined time
interval. The float also can provide instantaneous notification when
changes in state occur. The monitor stores this data in memory and
can use the data to generate an alarm. The multiple depth devices
help enhance these alarming capabilities.
The monitor memory can store a little over 2 years of data logged at
a 15-minute sample rate. This data is available to the user for
collection, further processing, analysis, and reporting. These
reports can assist municipalities and other industry in planning
improvements and additions to sewer systems and providing
information for the overall management of the sewer system.
The FlowAlert monitor, pressure depth sensor, and float switch are
primarily designed for use in sanitary and storm sewers and pump
station wet wells. The monitor mounts to the manhole rim or wall
slightly below the manhole cover. The pressure depth sensor
typically attaches to a ring installed in the sewer pipe a short
distance upstream from the manhole invert at a location called a