The meter’s design features two insertion-style multi-point
sensor assemblies oriented at 90 degrees from each other in
an “X” confguration. The advantage of the dual sensor “X”
confguration is that it averages over the complete 2-dimen-
sional cross-section of the pipe, resulting in the meter being
less sensitive to major upstream fow disturbances such as the
swirling and turbulent fow generated by pumps.
The FPI-X Mag meter also stood out to the city’s team
because of its economical product cost, low total installation cost, low overall cost of ownership and high accuracy.
Its multi-point electromagnetic fow sensing design provides
accurate measurement under turbulent fow conditions and
high repeatability in the city’s demanding water quality environments.
Further, the fow meters provide operational information through a supervisory control and data acquisition (
SCADA) system so plant staff can maintain
suitable fow rates to fll water storage
towers and maintain totalized fow records from each station. The fow meters
also provide up-to-date information on
the condition of the distribution system
in the affected pressure districts.
Cedar Rapids’ new units have been
operational for over 24 months at both
of the city’s booster station sites. One
FPI-X Mag meter was installed on the
single 30-inch line at the SW Bowling
Booster Station to accurately measure
the fow from its three centrifugal pumps
(see Fig. 3). Two FPI-X Mag meters were
needed at the NE J Avenue Booster Sta-
tion, each measuring the total output of
four vertical turbine pumps on two 24-
inch lines (see Fig. 4). After more than
two years of analysis, the Water Divi-
sion operations and maintenance team
reports that the new fow meters have
greatly improved accuracy and nearly
eliminated maintenance problems ex-
perienced with strap-on ultrasonic fow
meters at its booster stations. “The FPI-X Mag is between
maintenance free and maintenance friendly,” said Bill Con-
nolly, an Instrument Technician with the City of Cedar Rapids.
“We don’t get any of the interference that occurs with ultra-
sonic models. [It] is easy to set up and very accurate.” WW
About the Author: Nick Voss is a Product Manager for McCrometer, a leading global
flow instrumentation specialist specializing in the design, manufacture and testing
of flow metering solutions.
Circle No. 255 on Reader Service Card
WHEN THE CITY’S WATER DIVISION team began the process of selecting a
new type of meter, they knew water quality also played a role in their decision-making. The plant technicians were
aware that condensation and exterior pipe wall rust could contribute to transducer maintenance if they opted for
new ultrasonic flow meters.
Circle No. 29 on Reader Service Card
5300 Business Dr., Huntington Beach, CA 92649 USA • 714-893-8529 • email@example.com
www.blue-white.com • www.proseries-m.com
AND AD N
Three Models Available
with Feed Rates Ranging
from 0.1 GPH/.03 LPH to
158 GPH/600 LPH.
Smooth, Quiet and
Efcient Pumping Action.
Brushless Variable Speed
Terminal Blocks in
Junction Box for Remote
Patented Tube Failure
Detection, Patented Safety
Switch, Patented Method
for Extended Tube Life.
One or Two Pump,
Engineered Skid System