A method of and apparatus for cleaning and maintaining measuring devices, in particular viscosity and pH devices, for water based Flexo inks wherein the device for measuring a parameter of the inks are mounted to a platform such as a lid adapted to cover either a cleaning container or an ink container. A cylinder raises and lowers the lid and the device for measuring a parameter of the inks in and out of the cleaning container or the ink container. A carriage carrying the cleaning container and adapted to receive the ink container moves horizontally when the lid is raised such that either the ink container or the cleaning container underlies the lid and the measuring devices. With the lid lowered on to the cleaning container, the device for measuring a parameter of the inks are washed and rinsed in the cleaning container. The device for measuring a parameter of the inks are stored in the cleaning container until returned to the ink container for use.