3 General Principles
FLUXUS ADM 8027, F801, ADM 8127B
UMFLUXUS_F8V4-6-1EN, 2018-10-10
13
Fig. 3.2: Sound path of the signal in the flow direction.
Fig. 3.3: Sound path of the signal against the flow direction
Fig. 3.4: Signals and transit time difference
∆
t
transducer (emitter)
flow direction
of the fluid
sound path without flow
sound path with flow
pipe wall
α
β
γ
c
α
c
α
c
γ
c
β
transducer (receiver)
reduction in distance
in the transducer
flow direction
of the fluid
sound path without flow
sound path with flow
α
β
γ
c
α
c
α
c
γ
c
β
increase in distance
in the transducer
pipe wall
transducer (receiver)
transducer (emitter)
∆
t
signal in the
flow direction
signal against
the flow direction
