Measurement by the dripping of water meters – Water can also be measured at low flow rates; what principle is used for this?

I really don’t know that. When it was not possible to measure the usage before, dripping water for a day would fill a bucket, so there was no need to pay for water. It’s not possible now.

Look up this patent: Patent title – Method for manufacturing a drip-metering water meter. Patent abstract: This utility model relates to a drip-metering water meter, which includes a water meter housing, an internal cavity of the water meter, and a water meter core. It also comprises a guide sleeve, a magnetic contact ring, an inward-curving sealing ring, a magnetic valve core, a positioning washer, a sealing washer, a fastening ring, a sealing rubber strip for the water storage chamber, a return spring, and a flange； By using a drip-metering water meter, it is possible to measure very small flow rates in water accounting. The initial flow rate required for measurement was previously above 13 L/H, but with this innovative drip-metering water meter, the initial flow rate can be as low as 0.5 L/H, enabling the measurement of even minimal amounts of water flow. This prevents water theft through leaks, ensures that every drop of water used is accounted for, promotes fair billing based on actual usage, and thus reduces the management challenges for water supply agencies while conserving water resources ； Drip-type water meters have a simple structure, a long service life; they require no modifications to the original meter core, are cost-effective, and come at low prices. Method for manufacturing a drip-metering water meter http://www.x-jishu.com/zhuanli/52/200320127695.html

It would be great if it really worked; a new breakthrough

Is it useless? Try it at home to see if the water meter moves.