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Combating Errors Induced By Pulsating Flow in Flowmeter Measurement Flowmeters are well known to be sensitive to effects like pulsating flow, which can cause errors in flow measurement. In a pulsating flow system, the velocity profile of the flow undergoes a dramatic change during each cycle of pulsation compared to even flow conditions.  Figure 1. Image Credit: Titan Enterprises Ltd. Therefore, the key source of potential error in electronically sampling flow meters, like ultrasonic devices, is the sampling rate and how it will sense the real flow that passes through it. Ho...

Image zoom Credit: Getty Images. Home pregnancy tests work by detecting the presence of the hormone human chorionic gonadotropin (hCG), which shows up in your urine shortly after conception. They're available at grocery stores and pharmacies, and they're relatively easy to use. But how accurate are home pregnancy tests, and what external factors can affect the results? Here's everything you need to know.  How Accurate are Pregnancy Tests? Home pregnancy tests claim to be about 99 percent accurate...