Table 1, A. transducer location – Dynasonics UFX ULTRASONIC FLOW METER User Manual

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A. TRANSDUCER LOCATION

Selecting the proper location for taking a flow measurement is the single
most critical step in the operational procedure. The transducer utilized
by the UFX flow meter contains two piezoelectric crystals for transmitting
and receiving ultrasonic signals through the wall of a pipe. Select a
transducer location with adequate straight runs (without flow disturbances)
of pipe, both upstream and downstream, to achieve stable and accurate
readings. Examples of common piping configurations and the
recommended minimum upstream and downstream pipe lengths are
included in Table 1.

Note:

If adequate straight plumbing cannot be provided the UFX will

operate repeatably, but will most likely not achieve ideal accuracy.

FLOW

Table 1