The Problem with Water Detector Probes has always been that they are impossible to test periodically without injecting water into the vessel. People have been afraid that too much water may be injected.
The One-CC Probe solves this simply. First, it has a new, unique design that only needs 1 ml (1cc) of water for a complete test. Second, it has a built-in water pump, and this pump is only capable of injecting 1 ml (1 cc) of water.
For more information – water probe 1cc information