Qualified Personnel
The DM01A devices may only be installed by trained, qualified personnel who are able to
mount the devices correctly. Qualified personnel are persons, who are familiar with
assembling, installation, placing in service and operating these devices and who are suit-
ably trained and qualified.
Inward Monitoring
Please check directly after delivery the device for any transport damages and deficiencies.
Additional with reference to the accompanying delivery note the number of parts must be
checked.
Claims for replacement or goods which relate to transport damage can only be considered
valid if the delivery company is notified without delay.
Functional description
The magnetic inductive flow sensor func-
tions according to the induction principle.
A DC voltage is generated by the move-
ment of a conductor in a magnetic field.
The measuring tube of the DM01A is loc-
ated in a magnetic field (B). An electric-
ally conductive medium (V) flows
through
the measuring tube. The positive
and negative charge carriers are oppos-
itely deflected.
A voltage (U) is generated at right angles
to the magnetic field, which is picked up
by the two electrodes. Thereby, the
induced voltage is proportional to the average flor velocity of the liquid.
The electronics of the DM01A converts the induced voltage into a flow-proportional fre-
quency signal.
Construction
The measuring tube with its earthing sleeves and electrodes
passes through the housing and forms the external process
connection of the DM01A. A magnetic field for the measure-
ment process is generated inside the housing, which also
contains the sensor and signal conditioning circuitry. The two
stainless steel electrodes are located in the middle of the
measuring tube between the earthing sleeves.
The DM01A does not need any moving parts to make meas-
urements. The inside of the measuring tube is completely
open, allowing the fluid to flow unhindered through the meas-
uring tube.
DM01A Instruction manual 07/2019
page 3
