You can connect with the water pipe, measuring influent and effluent two parameters can be wall-mounted or embedded,easy installation, operation and maintenance.Measure the tap water in vs. The purified water going out of your water filration system at any time. Wide screen display design. Displays TDS levels of the feed water and product water within&out elctrode probes.Highly efficient and acurate due to its advanced micoprocessor technology. Installs quickly and easily., Manufacturer: Littimoon