The Global Sewer
Flow Monitor is reliable and accurate for measuring and
totalizing sanitary sewer system flows for VCP pipe.
The sewer flow meter measures water depth with the
highly accurate Global Water
pressure transducer. The
electronic circuitry instantly calculates and displays
the sewer system’s flow and total flow values for any
depth-to-flow relationship in any engineering units.
The sewer flow meter is easily set up in the field using
its unique four-button programming system.
Sewer System Flows
For any sewer system that is free flowing, there is a
specific relationship between depth of water and flow
rate. Whenever a given depth occurs, there will always
be the same flow. Therefore, if the flow rate is known
for each depth, a depth-to-flow relationship can be
constructed. The Sewer Flow Monitors are pre-programmed
with depth-to-flow relationship tables. When the user
digitally selects the correct sewer pipe table, the
Sewer Flow Monitor's LCD screen automatically displays
accurate flow rate measurements for the maximum diameter
of the sewer pipe. This water flow is averaged over
time to display total flow.
The Sewer Flow Monitors do not require a primary
device to measure sewer flows. The sewer flow meter has
been pre-programmed with a carefully selected group of
common pipe sizes and slopes to meet the needs of the
majority of sewer systems. Please review the sewer flow
tables to determine if your sewer system is supported.
Global Water can program the sewer flow meters with
custom tables to meet your sewer system's requirements.
Sewer Flow Depth Measurement
The Sewer Flow Monitors measure flow depth with the
highly-accurate WL400
Water Level Sensor, which is a fully submersible
water level sensor constructed of stainless steel. The
standard level range is from 0 to 3' of water, which
provides for accurate flow measurements even with a
depth change as small as a fraction of an inch. The
pressure transducer is mounted on the bottom of the
sewer pipe pointed downstream. Global Water recommends
the use of our sewer flow option for maximum protection
of the pressure transducer. The water level sensor has
a 2-wire 4-20 mA signal, so the sewer flow meter
enclosure can be mounted several hundred feet away, if
required. The sensor and sewer flow meter can be
connected with standard, twisted-pair signal wire.
Global Water also offers an ultrasonic water level
sensor that allows the Sewer Flow Monitor to measure
semi-solid flows or flows that are not suitable for a
standard submersible pressure transducer. Global Water
recommends that the ultrasonic sensor option only be
used in areas where AC power is available. You should
strongly consider using a submersible pressure
transducer for applications that are in areas without AC
power.
Sewer Flow Monitor Display and Outputs
The sewer flow monitor displays flow rate on a large
6-digit LCD screen. The totalized output is shown on a
second LCD display. The display reads in user-defined
units of flow, including MGD, CFS, GPM, m3s.
The sewer flow monitor also produces an analog 4-20 mA
output signal that is proportional to flow. This can be
used for chart recorders, dataloggers, or as an input to
telemetry or process control systems. In addition, the
sewer flow rate meters have a flow-proportional output
signal for triggering water samplers.
Sewer Flow Monitor Digital Flow Computer
The Global Sewer Flow Monitor has powerful internal
electronic circuitry that calculates and totalizes
sanitary sewer flow. The user chooses the desired
engineering units and selects a VCP sanitary sewer pipe
table from a list of over 20 pre-defined pipe tables.
It is not necessary to open the sewer flow meter's
enclosure to program the unit. All programming
selections are made using the four front panel push
buttons.
Sewer Flow Monitor Enclosure
The Sewer Flow Monitor's enclosure is made of
weatherproof injection molded plastic. It is suitable
for use in a wide variety of environments. The
enclosure can be wall-mounted and fitted with conduit
for sensor and power connections, if required.
Sewer Flow Monitor Specifications
Rate Display: 6 digit + decimal place, LCD
Totalizer Display: 6 digit + decimal place, LCD
Accuracy: Pressure transducer: +0.2% FS,
Flow Monitor: +0.01% + the depth-flow-table error
Flow Units: CFS, GPM, m3s, MGD
Totalizer: Related to Flow Units
Enclosure: 4 3/4" W x 8" H x 3" D, NEMA 4X (IP67)
Power: 120 VAC to 240 VAC, optional: Battery
powered (Must be specified at time of ordering)
Current Draw: 50mA Typical, 16mA in sleep mode,
and 120mA when the output relays are on
Pre-defined VCP Sanitary Sewer Pipe tables:
Roughness Factor: 0.014
Pipe Diameter: 6”, 8”, 12”
Pipe Slope: ½%, 1%, 1-1/2%, 2%, 3%, 4%, 6%, and
8%
Custom Table
You must provide Global Water with a depth-to-flow
equation or look up table at time of order. Please
allow for longer lead times.
Water Flow Logger Vented Cable
Conductors: 4 each 22 AWG
Material: Marine grade polyurethane jacket, HD
polyethylene vent tube, full foil shield
Shield: Aluminum Mylar
Outside Diameter: 7.8mm (0.307”)
Temperature Range: -22° to +185°F
Length: Standard 25' (up to 500' from factory)
Temperature range: -30° to 85°C (-22 to 185°F)
Weight: ~65g/m (0.7 oz/ft)
Sewer Flow Monitor Sensor
Sensor Element: Silicone Diaphragm, Wet/Wet
Transducer
Level Range: 0-3'
Temperature Range: 32-122°F (0-50°C)
Linearity and Hysteresis: ±0.1% FS
Accuracy:
Level: ±0.1% FS at constant temperature,
±0.2% over 32° to 70°F range
Temperature: Smaller of 0.5°F or ±1% of
reading
Overpressure: 2 x full scale range
Burst Pressure: 10 x full scale range
Resolution: Infinite (Analog)
Output Currents:
Level: 4-20mA ±1mA of full scale
Supply Voltage: 10-36VDC
Current Draw: Combined level and temperature
output currents
Warm Up Time: 3 seconds recommended
Operating Temperature: 0° (not frozen) to +185°F
Compensated Temperature Range: 32° to 70°F
submerged, automatic barometric compensation
Housing:
Material: 316 Stainless Steel Outer Sleeve,
PVC diffuser and strain relief
Size: 9” long x 1" diameter
Weight: ~250g (9oz)
FC200-S Sewer Flow Monitor
0-3' Depth Sensor on 25' of cable included. Please
specify correct sewer flow table when placing order. |
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Sewer Flow Monitor Battery and Enclosure Option
Includes Heavy-Duty Weather Resistant Environmental
Enclosure and 12V, 4.5Ah rechargable battery. |
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FC200-SD Sewer Flow Monitor Datalogger Package
Includes 0-3' submersible depth sensor on 25' of
cable, battery option, and an integrated
GL500S-2-1
serial datalogger. Please specify correct sewer
flow table when placing order. |
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PDAGL500 Deluxe PDA Package
Handheld PDA download package for GL500. |
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RELATED
PRODUCTS |
FL16 Water
Flow Logger
The Water Flow Logger revolutionizes flow data
collection for applications such as inflow &
infiltration studies, stormwater and wastewater
collection systems, open channels and a host of
other gravity flow systems. |
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WL-SWO Sewer Flow Option
Mouse-shaped cover protects sensor from fouling and
velocity effects in sewer, stormwater and irrigation
pipe flows. The cover is attached to 4" X 24"
stainless steel strap for mounting the level sensor
on pipe bottom. |
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GL500 Water Flow Meter Recorder
Features 7 analog channels and 2 pulse channels.
Requires an external 12 VDC power source. With
weather proof enclosure and 12V battery. |
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FC200 Open
Channel Flow Monitor
0-3' Depth Sensor on 25' of cable included. Please
specify flume/weir type when placing order. |
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FSS-STD
Flow Sampling System
A unique combination of products that makes
monitoring, sampling, and recording stormwater or
industrial discharge water flows easy. |
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WL700
Ultrasonic Water Level Sensor
Specify Water Level Range: 1', 3', 6'. Includes 10'
cable. |
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FP101 Flow
Probe
Water velocity probe for determining open channel
flow. |
