HI70431 Total Chlorine Indicator & citrate for PCA Series

Blackstone BL981411-1 Mini pH Controller, dosage of acid or base, Resolution 0.1pH, ​​115/230V

ORP glass electrode with single diaphragm, designed for drinking water quality controls.

Blackstone BL982411-0 ORP mini controller, 0 to 1000 mV, 115/230 V

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