Blackstone BL931700-1 Mini pH Controller, dosage of acid or base, 4-20 mA recorder output, 115/230 V Water treatment, sewage treatment, neutralization and decontamination, surface treatment, simple industrial processes

HI 8710 pH controller, ATC, Connection for electrode or the transmitter, 4-20 and 0-20 mA recorder output, For a combined application with the built-in regulator for HI 8720 ORP ORP dosing takes place exclusively at adequate pH level.