The Milwaukee pH and ORP controller MC510 is designed for people who want to automatically measure and control pH and ORP levels with a single controller. Simply set your pH and ORP parameters and let the Milwaukee controller do the rest. The Milwaukee MC125 pH/Redox Controller is ideal for use in aquariums, garden ponds, swimming pools, spas etc. The Milwaukee NC 125 is easy to use with simple 2-point manual calibration. The pH electrode and also the ORP electrode in laboratory quality are inlcuded.Milwaukee digital pH/ORP Controller MC125+ digital pH and ORP measuring and control unit+ pH range: 0.00 - 14.00 pH+ ORP range:1000mV+ pH resolution: 0.01 pH+ ORP resolution:1 mV+ pH accuracy:0.2 pH+ ORP accuracy:5 mV+ set point pH: 4 to 8 pH+ set point ORP: -200 to 600 mV+ calibration: Manual 2 points pH+ alarm active when reading is higher or lower than set point+ pH dosing contact+ 1 power plug for CO2 dosing+ ORP dosing contact+ 1 power plug for O3 dosing (ozone)+ pH electro