I am making a custom controller with a PLC. The probes for PH, SG, and temp are easy and cheap (relative).
But I figure there has to be like calcium, mag, alk, nitrite etc in a digital meter. Not necessarily to hook up to a controller at this point.
I come from industrial controls and electrical so everywhere I think to look has test equipment that will give me what I want is thousands of dollars and huge, but I do not need that kind of equipment for home aquaria.
Would be nice to find something where I can give it a water sample and push a button to get several results, and not cost several thousand.
I wouldn't mind 100 per parameter it measures kind of thing. Just want easy and digital readout.