Difference between level switch and level transmitter

Hello Engineers,
in this video I have explained difference between level switch and level transmitter.
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Regards,
Instrumentations World 🌍
Music: Aesthetics
Musician: SoulProdMusic
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#level switch and level transmitter difference
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[@VikramYadav-fw5iq]

Yes please make video on that doubt

[@toaster3822]

Mechanical engineer here been working for about 2 yrs now - thanks for the simple explanation. I was actually wondering why its 4-20ma instead of 0-20 before you mentioned it. Would love to kkow why.
Thanks

[@OREDAV]

The reason we don't use 4-20mA is to identify when there is a connection breakout..
We know the minimal value is 4mA and the maximum is 20mA, However when the value becomes 0mA it shows there is a connection breakout as this can be caused by certain factors say transmitter faulty or maybe no continuity of instrument signal