[pHaestus]

Ok this is actually a work-related question but here goes:

I need to measure and log different parameters (temperature, pH, Eh, {Ca2+}, etc in a bioreactor we are building. It looks to me like the easiest way to do this is to just buy a NI DAQ card and use their free software to continuously log the data. But I am not turning up much information on using DAQ cards to capture readings from electrodes. Is this going to work ok? They output a mV reading over a pretty big range (pH 4 to 10 is a 350 mV range) so I would think that this would work fine. But is there a lot of additional smoothing/conditioning circuitry on a pH meter that I don't know about? Anyone have any reasons why trying this is a bad idea? The electrodes are all BNC so I am assuming it's relatively easy to mate them to the DAQ card's analog inputs...