HI70431 Total Chlorine Indicator & citrate for PCA Series

Blackstone BL983315-1 TDS (total dissolved solids) mini controller, 0.0 to 199.9 mg / L, 115/230V. Water treatment, heating and air conditioning systems, cooling towers, surface technology, light industrial processes

Blackstone BL983313-1 Mini Conductivity Controller, 0 to 1999 ĩS / cm, 115/230 V Water treatment, heating and air conditioning systems, cooling towers, surface technology, Simple industrial processes