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Sensor:
Accuracy:
Fitting:
Max Flow:
Max working
press:
DIN 1945, ISO 1217 at 20°C and
Measurement:
See air flow measuring range table
Measurement
range:
Probe:
Sensor type:
Sensor medium:
Sensor
calibration:
-30ºC to +80ºC (-22°F ~ +176°F)
Temperature
range:
Combined:
Polypropylene case, molded
External
protection:
Dimensions:
Polypropylene case (W x H x D)
Weight:
4.2.13.2 Sensor installation
Warning: risk of high pressure, vent the
compressed air system to atmosphere before
attempting to install or de-install the air flow
sensor.
To measure the air flow of the entire
compressed air system, mount the air flow
sensor at a location where the sensor is
exposed to 'common' air flow of all
compressors in the system at all times. A
straight pipe of sufficient length after the
common 'wet' air receiver or dryer (when
used) is necessary.
To maintain acceptable accuracy the sensor
must be inserted in the center of a straight
pipe with undisturbed flow progression.
Undisturbed flow is assumed when no
obstacles, seams, edges, curves are present
in area L of the diagram below. Be aware that
the air flow sensor is directional.
±3% of measured value
G½"
185 m/sec (607 ft/sec)
50 bar g
(750 psi g)
1000mbar a
Stainless Steel 1, 4301
Calorimetric; Pt45, Pt1000
Air, Gas
Di=53.1; 0-10m3/min
cushion insert
Logger (W x H x D)
98 x 203.2 x 34.8mm
3.8 x 8.0 x 1.3 inch
437 x 379 x 100mm
17.2 x 14.9 x 3.9 inch
2.88kg (6.34lbs)
•
L: Length of pipe section
•
At inlet (L1): 15 x inner pipe diameter
•
At outlet (L2): 5 x inner pipe diameter
•
D: Inner diameter of pipe wall
Where flow obstructions exist before the
measuring section L1 should be adjusted as
follows...
Flow obstruction
Slight curve (bend <90°)
Reduction in D
Expansion in D
90° bend
2 x 90° bends on one level
2 x 90° bends with a three
dimensional change in
direction
Shut off valve
Observe the flow direction which should match
with the arrows at the sensor connector head!
The sensor head must be placed in the center
of the pipe. Therefore, the probe shaft has a
scale. To determine the correct position,
measure the length from the marked position
to the center of the pipe. The probe can then
be inserted up to this measure and then
secured.
Assembly is carried out by inserting the
connection thread (1/2" thread, SW 27) into
the connection piece. The sensor is then
inserted to the required depth and aligned
according to the direction of air flow. A depth
scale engraved on the probe tube, a flow
alignment arrow and an aligning device will be
of help to you. Once the sensor has been
aligned, the adapter sleeve must be tightened
with the stipulated torque (SW 17).
Attention: Alignment of the sensor must not be
modified when tightening the connection
thread and adapter sleeve. Check the depth
and alignment again and correct if necessary!
L1 (Min) ¹
12 x D
15 x D
15 x D
15 x D
20 x D
35 x D
45 x D
Page 19
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