Measuring Water Flow

Rather than looking at a meter containing numbers, a sensor could transmit the numbers by using a "Hall Effect" sensor and a Wifi Board.  If there was an emergency break in the water pipe, the excess water flow would be instantly recorded and trasmitted.

The datalogger pictured here records the water flow to an SD Card. The datalogger can be improved by attaching a WiFi module (Like an ESP32 ) to transmit the readings to a central point,
At less than j$10 ( Australian ), developers have amazing power of Internet communication and control.  What can you invent?