Flow duration monitoring device for domestic water supply

摘要

In the supply is a connection system (1) carrying both the main stream (2) and a secondary stream (3) in a smaller cross-section pipe. The main stream (2) has a constrictor (5) which partly closes the flow. In the secondary stream (3) is an electrical flow measurement device (7) using a temperature sensor.An electronic device (10) operates an optical or acoustic alarm and closes an electrically operated valve (14) in series with the connection system (1), if the secondary flow measurement device (7) detects a flow of duration longer than a predetermined time period.