KROHNE OPTIBAR P 3050 C EN - Manual (Page 34)

7
TECHNICAL DATA
34
OPTIBAR P 3050 C
www.krohne.com 03/2012 - 4001953401 - MA OPTIBAR P3050C R02 en
Technical data
7.1 Measuring principle
The process pressure is transmitted from the metal diaphragm (7) via the liquid fill behind it
(5) directly to the silicone measuring cell (3). The embedded piezoresistive measuring
elements on the silicone diaphragm (4) experience a corresponding strain which is then
converted via a Wheatstone Bridge circuit to a voltage proportional to the applied process
pressure.
Absolute pressure, gauge pressure and vacuum can be measured using this measuring
principle.
Figure 7-1: Measuring principle for pressure measurement
1 Signal cables of measuring bridge
2 Ventilation (only with gauge pressure transmitters)
3 Silicone cell
4 Silicone diaphragm with piezoresistive elements
5 Liquid fill
6 Process pressure "P"
7 Metal diaphragm
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