The high performance differential pressure transmitter can be used to measure liquid,
gas or steam flow. It outputs a
4 to 20 mA DC signal corresponding to the measured differen-
tial pressure.
In the variable head producers, the relationship between the flow rate and the differen-
tial head produced is expressed as,
Q ∝ h .
As the above relationship is non-linear, it is necessary to make the current of the trans-
mitters as a linear one. For the purpose of linearising the current, the square root extractor,
which may be built-in or externally added, is used.
Fig. 1.24 shows the photographic view of high performance differential pressure
transmitter. Fig. 1.25 shows the differential pressure transmitter with built-in square root
extractor and Fig. 1.26 shows the differential pressure transmitter with external square root
extractor.
trancelet kare marathi ,Hindi, etc.
Fig. 1.24 High performance differential Pressure transmitter.