Elis SONOELIS SE 4015 Product Application, Installation And Service Manual page 11

ELIS PLZEŇ a. s.
Errorless meter operation cannot be guaranteed unless the sensor is completely filled with the measured fluid at all
times. Therefore the sensor should not be located at the highest piping sections or in vertical piping sections if the fluid
flow direction is downwards, in particular in situations where there is a piping outlet into open reservoirs or tanks
anywhere near (see Fig. 12).
Another factor that may influence the meter function is the sensor angle position with respect to its longitudinal axis.
Occasional air bubbles in the piping may get caught in the hollow welded-on probe holders where they would disrupt
the measuring process. To effectively prevent this from occurring, the sensor probes should best be in the horizontal
plane (see Fig. 13a). If for any reason such position is not possible, the sensor body may be fitted in angular position
where the probe plane and horizontal plane form an angle of not more than 30°. The probes planes of double-beam
sensors (SE4025) and vertical plane form an angle 45° (see Fig. 13b)
ELIS PLZEŇ a. s., Luční 15, P. O. BOX 126, 304 26 Plzeň, Czech Republic, tel.: +420/377 517 711, fax: +420/377 517 722
Product application, installation and service manual
Ultrasonic Flow Meter SONOELIS SE 4015 and SE 4025
Fig. 11 Sensor fitted into a vertical piping section
FLOW DIRECTION
Fig. 12 Examples of incorrect sensor placement
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