The Aqua Medic mV Monitor is a precision instrument for controlling permanently the redox potential in aquaria. The LED display continuously shows the current redox value of the aquarium water. The measuring range covers mV-values from -1,999 to +1,999. A 230 mV test solution, available as an accessory, allows checking and adjusting the electrode that is connected to the Aqua Medic mV Monitor via a BNC connection.Included in the delivery: mV monitor, mV electrode with BNC fitting, electrode holder, 0-point-plug, power supply, wall mounttechnical data Aqua Medic mV MonitorMeasuring range: from -1,999 to +1,999 mVResolution: 1 mVWorking temperature: 0 - 50CHumidity: below 80%Power connection: input: 100 - 240 V, 50/60 Hz AC, output: 12 V DC