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MagProbe Selection Guide |
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What makes MagProbe different?
MFX meters can be universally applied to a large range of pipe sizes without
hardware changes, compared to the specific internal pipe dimension design of
conventional magnetic meters. MagProbe sensors are available in various
lengths to accommodate limited access mounting configurations and
installation in pipe internal diameters up to 120 inches [3048 mm].
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Probe Length Selection
Before purchasing a MagProbe insertion flow meter, it is necessary to calculate the
probe length required for a particular piping system. In order to complete this calculation,
some knowledge of the piping system must be known. The variables required are:
- Pipe internal diameter
- Pipe wall thickness
- The length of the valve stack
- Amount of straight pipe diameters in the system
By using this information and referring to the picture below, a minimum probe length can
be determined.
Measurement A
The typical depth that the MagProbe tip is inserted into the piping
system is 1/8 of the pipe internal diameter. Assume 1/8 of the pipe internal diameter unless
a system piping configuration does not have at least 15 pipe diameters
of straight pipe in the installation area. In that case, use 1/2 of the
pipe internal diameter--this will allow for flow profiling to be performed.
Measurement B
Pipe wall thickness can be obtained from
standard pipe wall charts or ideally can be measured using an ultrasonic wall thickness gauge.
Measurement C
Estimate the height that is going to be taken up by the pipe tap, nipple
and full-flow ball valve. Probes utilize 1-1/2" NPT hardware.
Measurement D
The insertion fitting is 2.5 inches.
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Minimum Probe Required = A+B+C+D
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