The Milwaukee ORP controller MC510 is designed for people who want to automatically measure and control the ORP levels in high accuracy. Simply set your ORP parameters and let the Milwaukee controller do the rest. The Milwaukee MC510 Redox Controller is ideal for use in aquariums, garden ponds, swimming pools, spas etc. The ORP electrode in laboratory quality is inlcuded.Milwaukee digital ORP Controller MC510+ digital ORP measuring and control unit+ measuring range:1000mV+ resolution:1 mV+ accuracy:5 mV+ set point ORP: 0 to 600 mV+ alarm active when reading is higher or lower than set point+ ORP dosing contact+ 1 power plug for O3 dosing (ozone)+ ORP electrode: MA921B/2 (included)+ environment: 0 to 50C, max RH 95%+ power supply: 12 VDC adapter (included)+ dimensions: 148.5 x 82.5 x 32 mm