MagProbe Selection Guide

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].

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

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.

Minimum Probe Required = A+B+C+D