Trolmaster PH provides accurate and reliable pH monitoring through Aqua-X. The PPH-2 probe is a commercially intended probe and connects to the Aqua-X system through the AMP-2 unit. It is designed to be placed in a water tank. The BNC connector allows a direct connection to the AMP-2 sensor board. If the pH probe dries out completely, it will stop functioning properly. A pH reading from a probe returned without liquid will not be covered by the warranty.