Hand held shower head with filter replacing pre-alarm assembly

摘要

A hand held shower head (10) with a filter element (62) and filter replacing alarm assembly comprises a propeller wheel (56) with a magnetic induce signal emitter and signal receptor confronted each other as well as a digital display connected to the signal receptor. Thus, the contrivance generates pre-alarm upon the total quantity by accumulative flux of flowing water, passing through the filter embedded therein, reaching effective critical point, it can initiate alarms to remind the user to replace the filter assembly timely in order to ensure the water filtrated in good quality.