It bounces off the far wall of the pipe and into a second water flow sensor that measures the time delay between pulses caused by the liquid. One of them generates an ultrasonic pulse angularly directed into the media. Two water flow sensors are placed on the exterior of the pipe. Ultrasonic water flow meters eliminate moving parts or bluffs entirely. Volumetric water flow meters are extremely useful in moderately viscous media. These vortices are measured by the water flow meter to determine the rate of flow. Liquid flows around the bluff, creating pockets of low-velocity fluids that generate vortices rotating in the liquid. An obstruction (sometimes referred to as a bluff) is placed inside the pipe. Vortex water flow meters use advanced scientific principles to measure the flow of liquids. Positive displacement meters require no field calibrating even if the media or viscosity changes, the meter’s accuracy is unaffected. Positive displacement flow meters are well-suited for low viscosity liquids without abrasives or other solids that can damage the internal components. Using a simple conversion process, the gear's spin rate can be converted into the flow rate of the liquid. The spin rate of the gear is proportional to the velocity of the liquid. Positive Displacement Flow Meters (Oval Gear Meters)Ī water flow meter uses a wheel or gear that spins due to flowing liquid. Remote or local display configurations are options for many of GPImeters water flow meters which also include different signal output options such as 4-20mA and pulse outputs.īut which water flow meter types are best for your application? We list some of their applications, look at the five most common water flow sensor varieties and discuss other media some can measure.ġ. Other meters fall in between those ranges. GPImeters economy meters have accuracies in ±5% range, and the high-end meters have accuracies as low as ☐.5%. The accuracies of water flow meters correlate with pricing. Different body materials of the meter will vary in temperature and pressure ratings. Some economy water flow meters measure only totals.īody materials and wetted parts play an important role in durability requirements or compatibility needs if used for media other than water. Most of GPImeters water flow meters measure the rate of flow and batch and cumulative totals. For much higher flow rates, GPImeters has insertion-type flow meters that can measure up to 780,000 GPM. GPImeters offers flow ranges starting as low as 0.13 GPH and as high as 800 GPM in sizes from 1/8” threaded to 4” flanged. Whether they are referred to as water flow meters, water meters, water flow gauges, or water flow sensors, they are used as monitoring devices for everything from wastewater plumbing to critical systems, such as cooling lines for generators.Ĭhoosing a water flow meter starts with finding one that is close to available flow ranges and matches the connection size and type of your piping. Water flow meters are essential tools that help companies measure flow rates and the total usage of water and different media.
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