Industrial control instruments with high-contrast backlit display for pH/Redox (0-14 pH, ±2000 mV), conductivity (0.054-200,000 μS), free chlorine, flow rate, temperature (PT100/PT1000), turbidity (0-4000 NTU), and mA inputs. IP65 protection, 4 independent relays, RS485 Modbus RTU, dual 4-20mA outputs. Available for wall or panel mounting.