The most commonly used flowmeter is the orifice meter. The orifice meter consists of two parts. As shown in Figure 1, they are the measurement orifice plate, which is installed in the process line, and the differential pressure transmitter, which measures the pressure developed across the orifice plate. There has been extensive research to determine the operating characteristics of orifice meters.

A noninvasive method to accurately quantitate the severity of mitral insufficiency would be of major clinical value. In theory, in the absence of confounding variables, regurgitant mitral flow should represent the difference between forward mitral blood flow and aortic blood flow. Since Doppler-two-dimensional echocardiographic (D2DE) methods for measuring transvalvular mitral and aortic flow h...

AIM To evaluate the interobserver variability and retest reproducibility of confocal scanning laser Doppler flowmeter in measuring capillary perfusion of the peripapillary retina. METHODS Blood flow measurements were performed in one eye of 10 normal subjects by two investigators on two different days (visits). Five separate measurements of the peripapillary blood flow parameters were recorde...

The goal of our work is focused on the microcomputer application for fluid flow measuring. The contribution describes design of the flowmeter (time of – flight sensor) with microcomputer, so describes the evaluation circuit and the metering procedure. The displacement of a temperature profile caused by the fluid flow in the sensor tube is simulated by the simulation program FEMLAB.

Two cases with rib injuries are reported where intercostal nerve block without rib palpation was safely and successfully performed on six separate occasions using a Doppler blood-flow detector ultrasound stethoscope. A third case studied by a radiologist using a pulsed Doppler flowmeter, determined the source of the Doppler signals as originating from the intercostal artery. The significance of...

Sandy water sources are widely distributed and important for agricultural development. However, no explicit result has been achieved in the research of accuracy reliability pipeline metering devices as well flow rate measurement objects (water or water–sand) different process pipelines conveying muddy water. In this study, seven kinds sediment concentration gradients, C0–C6 (0.2–7.19%), three v...