If a flow transmitter (magnetic type FT) that can measure flow and temperature, then why in some industries people use flow transmitter and temperature transmitter in the same line 1 after another? Even after 1 single flow FT is capable of measuring flow as well as temperature.
Answer Posted / carl_ellis
I'm aware of few high end flow meters (coriolis) that measure process temperature as well a flow rate, but I'm not aware of a magnetic flow meter that does so. There are magmeters that measure the electronic temperature of the electronics for diagnostics, but the temperature value is really to used for warranty replacement evaluation (to make sure that the failure wasn't due to overheating).
The multimeasurement concept is certainly valid - fewer insertions into the process. As to why a process temperature output is available but is not used but a separate temperature sensor is used, I can only speculate that either the instrumentation designer was just unaware of the availability of the temperature from the flow meter or was subject to the "we've always done it as a separate sensor" philosophy.
In general though, the vast majority of flow meters are just that, flow meters; they are not multivariable meters with a flow output and a temperature output. With the increased use of fieldbus, that's likely to change over the next decade.
Carl Ellis
Measure First
Is This Answer Correct ? | 2 Yes | 0 No |
Post New Answer View All Answers
hye SAM acn u send your e mail id, so that i can solve my query through e mail?
why we are using drum level control valve air to close?
what is the advantage of submersible level transmitter compare to ultrasonic level transmitter?
What is the differerence between hysterisis and linearity.
what are the steps I have to deal with?
Sir,I am going to sit for IOCL written test exam. recently.Can anyone tell me the name of 'Objective type Question Book on Instrumentation Engineering ' which will help me. Pl. mail to bidyut_71@rediffmail.com / bidyut.saha2008@indiatimes.com / bidyut.saha09@yahoo.in
What are different types of orifice plates? State their uses.
What is surge and how is it prevented, what is the purpose of bypass valve across AS valve.
Explain the combusion chamber
I have 0.75mm sq multicore cable (IS type) , can use instead of same type but 1.5 sq mm cable ? Note : The distance is around about 150 meter.
Turbidity analyzer working principle ?
Draw block digram for well head from well to shipping pump?
Dear Friends, we are planning to design Power distribution and Fiber optic in the same cabinet.Like Front side Fiber optic and Rear side Power distribution.Is it any possibility of problem occurs like interference etc? Your answer is highly appreciate.
What are different types of cable?
full process of gas turbin?