Hi,
Yes kai has done a very great job ! .

Erik , do you say that an RCV420 is an overkill for industrial uses . And it is enough to use simple differential amplifiers ? .I have got a project in which we have to measure AC coach (Railway) temperature and humidity what will you suggest a costly RCV420 or simple opamp in differential mode as Kai has suggested .But there is a lot of difference in CMRR almost 50% ! .


Regards
Sanjeev