Someone suggested the following product to us, it said in its data-sheet that it can somehow block noise.
That would be noise generated by ground loop issues or where your sensor needs to float at a different voltage than your measurement or control device.
That appears to be an isolator for 4-20mA current loop systems so is unlikely to be applicable to your application.
http://en.wikipedia.org/wiki/Current_loopAlso i also appreciate if you could help me to specify what KIND of noise we are facing. THX!
well that is the question, isn't it?
Unfortunately without more information it is unlikely anyone can guess, it sounds like you are using something like an LM335 but 10uA as the data sheet suggests >400uA is needed.
Also what are you measuring and where?
is it a noisy electrical environment?
are you running long leads to the sensor?
Sometimes the simplest fix is to apply a low pass filter - the trade off being that this will slow measurement times