American Marine PINPOINT ORP Controller & Probe™ is an inexpensive rugged controller complete with a platinum ORP probe. This device will automate another electrical device like an ozonizer or ozone generator. This full featured controller will accommodate an electrical device up to 5.0 amps at 110VAC. A 220VAC version is also available. The PINPOINT ORP Controller™ is the perfect way to automate ozone in the aquarium.