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Animation How It Works Pressure Measurement

Pressure Transmitter Animation

Pressure Transmitter Working Animation
Pressure Transmitter Animation

Animation Credits : Siemens

Pressure Transmitter Working Principle:

When we apply pressure to the Pressure Transmitter, then the applied pressure acts as a force on the diaphragm inside the pressure transmitter. Then the diaphragm either expands or compress depends on the applied pressure.


Diaphragm expand or compress basis on positive or negative pressure. The resistors are mounted on top of the diaphragm. So when the diaphragm expands or compress, the resistance value changes. These resistors are connected in a standard Wheatstone bridge. The change in resistance is measured using a Wheatstone bridge. The bridge output is proportional to applied pressure.


Note: In Some types of pressure transmitters manufactures can use capacitance, inductance, conductivity, piezo electric crystals etc in place of resistors. So depending on the applied pressure the diaphragm expands or compress, then respective sensor parameter like resistance, capacitance, inductance, piezo electric crystal etc.. will change and it is proportional to the pressure.

Finally this is all I could do in this tutorial and I hope it is simple enough to understand for newbies too.

If you’re facing any kind of problem or need any help regarding understanding of Pressure Transmitters then just leave your message in the comments or shoot me an email. Your feedback is much appreciated.


I’ll definitely get back to support you. Support me by sharing this post and socializing with me. 🙂

Also See :
Non-Contact Radar Level Transmitter Animation


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Akbar June 15, 2015 at 4:21 pm

Excellent Explanation using Pressure Transmitter Animation…. Dude !!!

San June 16, 2015 at 6:55 am

Awesome Animation @ Good Work.

dheeraj dhawas March 17, 2016 at 8:55 am

Dear sir,

amazing explanation, but tell me about wheatstone bridge so that i can fully Understand.

Varsha April 20, 2016 at 4:38 am

Excellant explanation Mr. Reddy.

ajaz sheikh May 10, 2016 at 4:54 pm

How to calibrate pressure tx

behram baloch May 18, 2016 at 5:44 am

excellent also plz explain working principle wheatstone bridge how goes signal to dcs or plc what changes

Hi tenders mishra June 13, 2016 at 4:13 pm

Sir how pizo electric transducer pressure transmitter works.

pradeep kumar July 21, 2016 at 1:26 pm

Respected sir ,
i am very thank full for giving most valuable information with good animation and explanation and also i am requesting you plz explain how to calibrate to absolute pressure transmitter of range -1 to 1.5 kg/sqr cm. Thanking u sir

Bhavin Bhimani November 12, 2016 at 9:22 am

Sir I hv some questions regarding level transmitter,
How can work submersible level transmitter and how can we mount it and is it suitable for measuring level in canpiping??

Asad November 12, 2016 at 9:51 am

Sir Can U show a electronic Circuit of capacitance and piezo electric type pressure transmitter with a pressure Applying Animation.

jitendra meena July 25, 2017 at 10:15 am

very very useful for new join instrumentation engineer. we appreciate your hard work to the website. thank you sir

Muthukumar Murugan November 8, 2017 at 12:32 pm

We are using Pressure Transmitter (Yokogawa Transmitter). Range from 5 bar to 100 bar.
It was located in Compressor discharge line (30″ Line).
Pressure Transmitter Operation Range up to 72 Barg. It is communicating via Profibus with Siemens PCS7 System.
When Compressor running that pressure transmitter giving spike of more that 100 bar for 10 seconds. That over range is tripping system.

Do you have any idea. Problem in transmitter Or PCS7 system. Please advice..

kuthbudeen ibrahim November 11, 2017 at 5:54 am

check the intial current of the compressor. this high amount of pressure only displayed on 10 sec.plz check the compressor if u have any gauge in that line check the gauge pressure also

manish wadia January 28, 2018 at 6:37 am

thank,s you…sir for yours ..kind of support at the level inside of the instrumentation,,,, thanx again

Moin Uddin Ahmed. March 27, 2018 at 9:22 am

Dear Sir,
Thank You for Your kind effort & co-operation. I am expecting a suggestion from You. Say I am using a Differential Pressure Transmitter for measuring Pressure, Level Or Flow. Output of Differential Pressure Transmitter is 4-20 mA but I want to display it directly on Monitor not in the om of mA rather Pressure or Flow.. So have any configureable Display ? So that I can recognize it 4mA means certain pressure & 20 mA means another certain pressure & it will follow equation like y=mx +c. It will also record the Data of specified time (after 10 minutes interval it will record & send) & it will send it to another computer through internet.

Mohammad. Irshad May 3, 2018 at 7:09 pm

Dear Sir,

I really appreciate your work. Thank you for your kind support to us.

Please provide us more and more information about Instrumentation and cover the practical points of view those peoples are working in Industrial instrumentation. your information is really needed.

Thanking you once again.
Mohammad. Irshad Mallick

Rico Lasmarias June 26, 2018 at 11:10 am

when i blow off either high side or low pressure side of my transmitter for cleaning the pipe line due to mud water my remote water level indicator does not work as normal before.

Mohammed November 22, 2018 at 3:25 am

Thanks a lot for your illustrations …
If I want to convert these signals that produced by sensor (4-20ma) to Ethernet signal to transmit it to another location by antenna ,so what I need or work to do that …


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