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Example:
A flow of 3 m/s (v) in a sensor with a diameter reduction from DN 100 to DN 80 (d
1
/d
2
= 0.8) gives
a pressure drop of 2.9 mbar.
4.2
Orienting the sensor
Flow direction
The calibrated flow direction is marked by the arrow on the sensor. Flow in this direction is
indicated as positive by default. The accuracy of the sensor does not change with reverse flow.
Figure 4-5
Flow direction indicator
Installing/Mounting
4.2 Orienting the sensor
SITRANS FM MAG 3100
26
Operating Instructions, 12/2021, A5E03005599-AE