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[?]: how to know if a sensor is damaged?

Posted: Sun Mar 03, 2013 2:14 am
by dcastibl1
Hi everybody.
I have a question and it is about how to know if a sensor (used in automation) are damaged?
what is the procedure for that?
the truth I have no idea about that.
I appreciate your answers.

Re: [?]: how to know if a sensor is damaged?

Posted: Sun Mar 03, 2013 4:03 pm
by CoMod
Use 4-20 mA interface.
0 mA = wire break

Or use redundant pair of sensors.