6
2.
PRODUCT DESCRIPTION
The flow sensor of the series EE772, based on the measurement principle of thermal mass flow, is suited for
the measurement of flow of air and gases in pipelines. Measurement of for instance the consumption of com-
pressed air, nitrogen, CO
2
or other non-corrosive and non-flammable gases.
The EE772 measures the volume flow at standard conditions according to DIN 1343 (P
0
=1023.25 mbar;
t
0
=273.15 K or 0 °C (32 °F). In addition to the standard volume flow, the measurand mass flow, norm flow and
temperature are available.
The EE772 has an integrated consumption counter. The consumption quantity is indicated in the display and
is not lost after a power failure. Two signal outputs are available. Depending on the application, the outputs
can be configured as analogue (current or voltage), switch output or as pulse output for the measurement of
the consumption.
Gauge mounting block
The gauge mounting block allows for the easy and reliable
installation within the pipeline. During installation in the pipeline,
observe the required inlet and outlet paths (see page 9).
The nominal size of the gauge mounting block must match the
nominal size of the pipe. The gauge mounting block is suitable
for pressures up to 40 bar (580 PSI) and available for pipe
diameters DN40 (1 1/2") to DN80 (3").
The gauge mounting block with hot tap valve allows for the
installment and removal of the sensing probe under pressure
without interrupting the process flow.
Signal conditioning with optional display
The enclosure with the signal conditioning is mounted either
on the measurement probe (type T19 or T20 compact) or is
remote with a plugable sensor cable up to 10 meter (33 feet) –
(type T3 with remote probe).
Sensing probe with measurement electronics
The interchangeable sensing probe contains the sensor
element and the measurement electronics, in which the data of
the factory calibration is stored. The sensing probe is easy and
quickly interchangeable in the field, independent of the
electronics for the signal conditioning. After the exchange, the
configuration of the outputs is unchanged.
Screw cap
The screw cap, with female thread, is screwed in place if the
flow meter is not installed and the pipeline has to be used.
Sensor cable (only by model C with remote sensing probe)
The sensor cable allows for the remote installation, up to 10
meter (33 feet), of the sensing probe from the housing with the
signal conditioning.
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