DIY Automated salt water mixing system

[Seth81]

Originally Posted by sphelps

Can you rig up a Neptune probe?
http://www.jlaquatics.com/product/np...ity+Probe.html

Thats just the sensor part, I would also need a transmitter to go with it. I've seen a few guys on RC have built thier own transmitter to be used with any standard sensor, but IMO off the shelf solutions would probably work better then any transmitter I built myself.

Last time I tried designing my own DC amplifier for the field winding of an AC generator it looked like crap, worked but burnt out in about 30 seconds... Hence why i'm not an electronics engineer.

something like this would work, http://www.omega.com/ppt/pptsc.asp?ref=CDTX90 I would need the transmitter for $620 plus probe $320... just a wee bit iver the budget, there must be a more economical transmitter out there.