SENSOR PROBE INSTALLATION
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McCrometer. Any published technical data and instructions are subject to change without notice. Contact your McCrometer
representative for current technical data and instructions.
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8
Flow
Disturbance
Condition Upstream Downstream Notes
Gate Valves
100% Open 0D 0D
< 100% Open
20D; See
Note and
Figure 7
2D
Recommended to install the sensor 1D
upstream of the Gate Valves
Single 90
Degree
Elbows and
"T" Fittings
Sensor In Plane
with the Elbow -
See Figure 9
2D Max;
See Note
1D
It is recommended that the sensor be
installed as close to the elbow as possible, no
further than 2D downstream. Otherwise the
recommended upstream piping shall be 7D.
Sensor
Perpendicular to
plane of Elbow
7D 2D None
Single 45
Degree
Elbow or
pipe bend
less than 45
degrees
Sensor In Plane
with the Elbow -
See Figure 9
1D 1D None
Sensor
Perpendicular to
plane of Elbow
5D 2D None
Double
Elbows In
Plane
Sensor In Plane
with the Elbows-
See Figure 9
2D Max;
See Note
1D
It is recommended that the sensor be
installed as close to the elbow as possible, no
further than 2D downstream. Otherwise the
recommended upstream piping shall be 7D.
Sensor
Perpendicular to
plane of Elbows
7D 2D None
Double
Elbows Out
of Plane
Sensor In plane
with last elbow
7D 2D None
Reduced and
Increased
Inlets to the
Metering
Section
ID at Metering
Point up to 20%
Greater than ID of
upstream pipe
5D 1D
Concentric reduction recommended.
Example: Meter Section 12" Pipe, upstream
section 10" Pipe
ID at Metering
Point up to 50%
Less than ID of
upstream pipe
0D 0D
Concentric reduction recommended.
Example: Meter Section 10" Pipe, upstream
section 12" Pipe
Open
Discharge
Discharge of
pipe is vented to
atmosphere
Not
Applicable
2D Full Pipe Required
Pump
Discharge
Single Pump 5D 2D
Recommend putting sensor on suction side
of pump where possible.
Multiple Pump
on Common
Discharge Line
20D; See
Note
2D
Recommend putting sensor on suction side
of pump where possible.
Filter
Discharge
Standard Inline
Filter
5D 2D None
Note: The table above is not inclusive of each possible installation scenario for the McCrometer FPI Mag. For installations
not included in the table, the McCrometer Applications Team is available to review cases and make a determination as to the
viability of the installation. Please feel free to contact us with any questions or concerns.
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