Allen-Bradley 839E, User Manual, Page: 10 / 32

839E Solid-State Flow Sensors User Manual
8 Pub #10000004735 Ver 03, May 2012
Wiring
• The sensor tip should be completely
surrounded by medium.
• Position the sensor tip in the area of
maximum fluid velocity (pipe center).
• Minimum sensor immersion length:
L1 ±10 mm.
Figure 4 Installation conditions
Orientation:
• For horizontal pipes: lateral installation.
Note!
Installation from above (see Figure 4) only if
the pipe is completely filled with medium
during operation.
• For vertical pipes: installation in the
ascending pipeline.
• Installation of 839E by min. 3° inclination,
because of self draining.
Figure 5 Correct orientation
• Do not install in down
pipes open towards the
end.
• The sensor tip should
never touch the pipe
wall.
Figure 6 Incorrect installation
ATTENTION