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Dear All!
I am trying to understand concept behind limit switches available in market. I mean proximity, sensor SPDT but most importantly their certification. Please guide me in this direction. I will really apperciate your help.
Thanks all~
Go to
http://www.enm.com/training/siemensstepcourses.asp#Basics%20of%20Sensors
and select
Basics of Sensors
As a start.
I would Google the net for this type of question.