ECO-MEMO-Extension
ECO telescopes may be extended retroactively by the use of ECO-MEMO-Extensions. These contain mechanics indicating the open or shut state of the valve below, straight from the top of the telescope. MEMO may be applied to valves requiring between 5 and 56 turns. Initial set-up of the display is achieved automatically by shutting and opening the valve once. MEMO is then protected against manipulation.
