The device, designed by Jeon Hwan Soo, slips onto the end of the faucet and measures the flow of water. The total amount delivered is displayed on an LED readout. The idea is that you can measure water into a recipe straight from the tap instead of going via a measuring jug.
Or can you? The “instructions” for this widget only show it counting the cubic centimeters as they flow through. Thus, unless you are letting the water drip drip slowly into the waiting receptacle, you might want to measure into another container anyway, just in case you go too far.
To be truly useful, you should be able to set the volume first, and have the flow cut when it is reached. Otherwise its quicker just to use a graduated jug.
The Handy Meter isn’t confined to the kitchen sink, though. You can also put it over the opening of a bottle for accurate dosing. True accuracy would require liquid of the same density as water, though.
