The volumetric water meter is a type of water meter that achieves high-precision measurement by sequentially filling and discharging a known fixed volume of fluid. Its core principle is to use mechanical structures such as pistons or rotary chambers to divide the water flow into fixed-volume units, with a counting mechanism recording the number of fill-and-discharge cycles to calculate the total flow. This type of water meter is widely used in households and industrial settings, particularly in high-precision measurement scenarios, where it performs well in environments with good water quality.
and velocity water meters are the most classic and common comparisons when selecting a water meter. Both belong to small-diameter residential water meters, but they differ significantly in working principle, performance characteristics, and applicable scenarios.
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It uses structures such as pistons or discs to divide the water flow into individual "measuring chambers" of known volume, and then accumulates the total water volume by counting the number of these chambers. |
It uses the water flow to drive the rotation of an impeller (rotor), with its rotational speed proportional to the water velocity, and the total water volume is accumulated through a transmission mechanism. |
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High, especially under low flow rate and low velocity conditions. |
Less sensitive at low flow rates. |
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| Low. Even very small flows (such as dripping) can be measured accurately |
Requires a certain starting flow velocity; very small drips may not be measurable. |
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| Relatively high. Sensitive to impurities in the water (such as sediment, rust, or algae) and requires a filter | Relatively low. Strong anti-fouling ability, better adaptability to water quality, and less prone to clogging | |
| Residential use, high-value water measurement, leak detection, etc | Residential use; currently, the most common type of water meter in homes and buildings. |
Volumetric and velocity water meters each have their advantages and can complement each other. Volumetric water meters rely on , making them suitable for clean water and low-flow, precise measurement scenarios. Velocity water meters, on the other hand, offer a high cost-performance ratio and can cover most daily water usage needs. Water utilities can make the most suitable choice based on water quality, budget, and actual requirements for measurement accuracy.
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