BWT Aquameter is an add-on accessory for your BWT BestHead and BestHead Flex that installs in line and measure the water volume passing through the water filter cartridge.
When new filter is installed, program the water hardness settings on the LCD display, reset, and the Aquameter will start counting down. When 0 is shown, its an indication that the cartridge has reached its capacity and should be replaced. Please note that BestMax filters have variable volume capacity or 1 year, whatever comes first.
Included CR-2032 Battery.