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This customised solution was developed for an individual customer requirement from the pharmaceutical industry, a level measurement in a container. The application requires a very high measuring accuracy, and that with significantly varying pressures and a large temperature range at only one measuring point.
The solution is to use two pressure transmitters with different measuring ranges, both mounted on a diaphragm seal. 

Most pressure sensors are built using martensitic stainless steel as its resilient pro -
perties make it a suitable option for many applications. When the same material is
used in hydrogen however, it can become brittle – and hence fail after a short time.
As an alternative, pressure sensors with diaphragm seals and austenitic stainless steel
diaphragms can be used. Here another problem can arise: The small hydrogen molecu -
les can penetrate trough the stainless steel diaphragm and dissolve into the filling oil,
causing an off-set in the sensors zero point.

Due to the increasing level of automation in the process industry, new and more
specialised measurement tasks are constantly being developed. With patented dia-
phragm types and customer-specific designs for diaphragm seals, Labom makes its
contribution to exact results and a high level of operational reliability. This appro -
ach is particularly advantageous for measuring difficult media, for instance viscous
paints and coatings.