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Products Description
The Volumetric water meters (also known as piston water meters) are mechanical water meters that measure flow by accumulating fixed volumes of water. The introduction of volumetric water meters has addressed the limitations of traditional water meters in terms of measurement accuracy, adaptability, and application scenarios.
1. Issue of Insufficient Measurement Accuracy
Accuracy limitations of traditional water meters:
Traditional velocity-type water meters (such as turbine or woltman meters) measure flow by using water flow to drive an impeller. Their accuracy is easily affected by the flow conditions. For instance, under low or unstable flow conditions, the impeller may rotate irregularly, leading to issues such as a high starting flow threshold or under-registration of small flows. This is particularly problematic in residential settings, where dripping or low-flow usage is common, often resulting in significant measurement errors, water resource waste, or billing disputes.
Accuracy advantages of volumetric water meters:
Volumetric water meters use the "volumetric measurement" principle, where separated chambers (such as pistons, diaphragms, or rotary pistons) are cyclically filled and emptied with water to directly measure volume. Their key features include:
Higher accuracy at low flow rates: Effectively avoids under-registration of small flows.
Less affected by flow conditions: Regardless of whether the water flow is stable, as long as the chamber completes a fill-and-discharge cycle, it accurately measures a fixed volume of water.
Why are volumetric water meters suitable for residential water usage?
Household water consumption is characterized by small flow rates and intermittent usage (such as dripping taps, toilet flushing, and washing).
Traditional water meters often fail to register such usage accurately, leading to significant under-measurement, amounting to dozens of cubic meters annually.
Volumetric water meters, with their high sensitivity and low starting flow threshold, are capable of capturing every instance of small-flow usage. This ensures comprehensive, precise, and reliable measurement.
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