So everyone I've talked with (many china-men) say the sensors can only work for their Meter/Reader. Milwalkee and Hanna are two companies that seem to say "only use our probes on our meters".
Where can I get a relatively industrial (Waterproof/Submergible) EC/TDS/PH meter and not get robbed on the price? Better yet, how can I get one of those "6-in-1" meters to relay info to a raspberry pi/arduino? Either or. I just want this bot to work.