The Tunze mV(ORP) Controller Set, 7075, consists of mV controller 7071/2 and switched socket outlet 7075.11 (including power supply unit). The mV ORP controller precisely measures the ORP of your tank. A high-quality electroctrode is included along with cleaning solution and a 9V battery. It can be used with an ozonizer to precisely control the dosage of ozone in to your aquarium.
Auto-off function to prolong batter life Accurate electrode that is comparable to laboratory instruments in quality Universal mounting brackets included for easy installation