Flow meter full#

Cannot be altered for measuring pressure beyond a maximum velocity.Also there are no rapid changes in contour. Venturi tubes involve no projections into the fluid and no sharp corners.

They can be used with nearly all liquids, as well as those containing extreme solids content.

They can be mounted in large diameter pipes via flanged, welded or threaded-end fittings.

Venturi tube flowmeters involve no moving parts.

They can handle large flow volumes at low pressure drops.

Flow meter full#

By means of right instrumentation and flow calibration, the flowrate of a venturi tube can be brought down to about 10% of its full scale range with correct accuracy which in turn results in a TurnDown Rate of 10:1.The hall effect sensor is sealed from the water. Theres an integrated magnetic hall effect sensor that outputs an electrical pulse with every revolution. This sensor sits in line with your water line and contains a pinwheel sensor to measure how much liquid has moved through it. Venturi tube flowmeters are frequently used in applications involving higher TurnDown Rates or lower pressure drops, particularly in areas where orifice plates fails to perform. YF-S201 Hall Effect Water Flow Meter / Sensor.Use of venturi tubes involves a lot of savings in installation and operating and maintenance costs.Venturi tubes are resistant to corrosion, erosion, and internal scale build up, owing to their contoured nature, pooled with the self- scouring action of the flow through the tube.Unlike orifice plates, venturi tubes are almost insensitive to velocity profile effects and consequently call for less straight pipe run than an orifice.Since, the early cost of a venturi tube is quite high, it is mainly engaged on larger flows and in more complicated or challenging flow applications.A venturi tube can pass 25 to 50% extra flow than that of an orifice plate keeping the same drop in pressure.Venturi tubes exist in sizes up to 72″.Essential upstream pipe length of a venturi tube is 5 to 20 diameters.Usually, accuracy of a venturi tube is 1% of its full range.In venturi tubes, pressure loss is low and viscosity effect is high.Rangeability of a venturi tube varies from 4 to 1.Venturi tubes are appropriate for clean, dirty and viscous liquid and few slurry services as well.Pressure recovery for venturi tubes is a lot better as compared to the orifice plates.By measuring the change in pressure, the flow rate can be determined, as in various flow measurement devices such as venturi meters, venturi nozzles and orifice plates.