VEGA VEGAFLEX 62 4 … 20 mA_HART two-wire User Manual

Page 18

tandpipes or bypass tubes are normally metal tubes with a diameter

of 30 … 200 mm (1.18 … 7.87 in). In measurement technology such a
tube corresponds to a coax probe. It does not matter if the standpipe is
perforated or slotted for better mixing. Lateral inlets with bypass tubes
also do not inﬂuence the measurement.

easuring probes can be mounted in bypass tubes up to DN 200.

f VEGAFLEX 62 is used in standpipes or bypass tubes, contact with

the tube wall should be avoided. We oﬀer spacers as accessories for
fastening the probe in the middle of the tube.

epending on the tube diameter or tube length, one or several spacers

can be mounted. With cable probes, the cable can also be strained to
avoid contact with the tube.

eep in mind that buildup can form on the spacers. Strong buildup can

inﬂuence the measurement.

icrowaves can penetrate plastics. For process technical reasons,

plastic standpipes are problematic. If durability is no problem, then we
recommend the use of metal standpipes.

Fig. 10: Position of the spacer

Spacer

Note:
M

easurement in a standpipe is not recommended for very adhesive

products.

Standpipes or bypass
tubes

VEGAFLEX

62 • 4 … 20

mA/HART two-wire

4 M

ounting

31837

-EN

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