Process Measurement and Control Categories: All Flow and Level Wireless Process Signal Bridge Temperature Turbidity Dissolved Oxygen (DO) Conductivity (EC) pH and ORP (Redox) Universal Meters All / pH and ORP (Redox) All Flow and Level Wireless Process Signal Bridge Temperature Turbidity Dissolved Oxygen (DO) Conductivity (EC) pH and ORP (Redox) Universal Meters Quick View U900 Series Multi-Channel Industrial Controller $0.00 Available for Backorder Quick View D700 Series pH/ORP Controller $0.00 Available for Backorder Quick View 6309 POT pH/ORP and Temperature Analyzer from $144.00 Quick View 6313 pH or mV Controller/Transmitter from $139.00