Digital Flowmaster with built in TDS probe. Part of the growing family of high quality pump controllers from Purefreedom, same enclosure size as other flowmasters in the range so it makes and easy upgrade to an existing system. Building up your own system? ideal for van mounted systems, no more looking for the missing TDS meter this one would be fixed in position ready to give you a reading on your pure water. The controller will control your pump to allow you to adjust the flow rate from zero to flat out, it features dead end detection, battery voltage read out, low battery warning and low voltage shutdown.