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Measuring main voltage - Which sensor to use?

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rprodrigues

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sensing mains voltage

Hello all,

I need to measure main voltage (110V / 220V) but I can't use a voltage divider (with resistors) because of an isolation requeriment.

Which voltage sensor should I use? Any suggestions?

I know LEM have some, but they are too expensive.



Thank you!
 

FvM

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voltage sensor site:www.edaboard.com

A small transformer (print transformers are available starting from 0.3 VA) is the most economic AC voltage isolation solution.
 
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