Siemens SITRANS P DS III Operating Instructions Manual page 21

Level
This version with mounting flange measures the level of non-corrosive, corrosive and
hazardous liquids in open and closed containers. The smallest measuring span is 25 mbar
(0.363 psi), the largest 5 bar (72.5 psi). The nominal diameter of the mounting flange is DN
80 or DN 100 or 3" or 4".
The negative connection of the measuring cell is kept open when measuring the level of
open containers. This measurement is referred to as "measurement against atmosphere".
The negative connection is normally connected with the container when measuring the level
of closed containers. This balances the static pressure.
Wetted parts are made of various materials, depending on corrosion resistance
requirements.
Absolute pressure
This version measures the absolute pressure of aggressive, non-aggressive and hazardous
gases, vapors and liquids.
There are two series: a "differential pressure" series and a "gauge pressure" series. The
"differential pressure" series is distinguished by a high overload capability.
The smallest measuring span of the "differential pressure" series is 8.3 mbar a (0.12 psi a),
and the largest is 100 bar a (1450 psi a).
The smallest measuring span of the "gauge pressure" series is 8.3 mbar a (0.12 psi a), and
the largest is 30 bar a (435 psi a).
SITRANS P DS III with HART
Operating Instructions, 06/2013, A5E00047092-09
Description
3.2 Application range
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