Micropilot FMR53, FMR54
34 Endress+Hauser
Gas phase Temperature Pressure
1 bar (14.5 psi) 10 bar (145 psi) 50 bar (725 psi) 100 bar (1 450 psi) 160 bar (2 320 psi)
Water (saturated steam) 100 °C (212 °F) 0.02 % - - - -
180 °C (356 °F) - 2.1 % - - -
263 °C (505 °F) - - 8.6 % - -
310 °C (590 °F) - - - 22 % -
364 °C (687 °F) - - - - 41.8 %
With a known, constant pressure, it is possible to compensate for this measured error with a
linearization, for example.
Gas phase compensation
with external pressure
sensor (PROFIBUS PA,
FOUNDATION Fieldbus)
PROFIBUS devices can receive the signal from an external pressure sensor over the bus and use it to
automatically perform a pressure-dependent time-of-flight correction. In the case of saturated steam
in the temperature range from 100 to 350 °C (212 to 662 °F), this makes it possible to reduce the
distance measurement error of up to 29 % (without compensation) to below 3 % (with
compensation).
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