Table of Contents
How is pump flow measured?
Flow is the volume of water a pump can move at a given pressure. Flow is indicated on the horizontal axis in units like gallons per minute, or gallons per hour, as shown in Figure 2. In this curve, head is measured in PSI; flow is measured in gallons per hour.
Which sensing devices can be used to monitor flows?
This article will examine nine of the most commonly used technologies and devices used to measure gas and/or liquid flow.
- Thermal Anemometers.
- Differential Pressure Sensors.
- Vortex-Shedding Sensors.
- Positive Displacement Flow Sensors.
- Turbine-Based Flow Sensors.
- Mass Flowmeters.
- Electromagnetic Flow Sensors.
What are the two main uses of flow sensors?
They are commonly used in HVAC systems, medical devices, chemical factories, and septic systems. Flow sensors are able to detect leaks, blockages, pipe bursts, and changes in liquid concentration due to contamination or pollution. Flow sensors can be divided into two groups: contact and non-contact flow sensors.
How do flow rate sensors work?
A flow meter works by measuring the amount of a liquid, gas, or steam flowing through or around the flow meter sensors. Flow meters measure either volume or mass. The flow (Q) is equal to the cross-sectional area of the pipe (A) in a volumetric flow meter, and the velocity of the flowing fluid (v): Q = A * v.
How do you measure flow in a pipe?
Knowing the cross- sectional areas of the pipe and the constricted section, the flow is determined by measuring the drop in the pressure head. The drop in the pressure head is measured by providing openings in the Venturi meter at the points shown in the figure and connecting these openings to a U- tube manometer.
Which of the following flow measuring device does not cause of obstruction to flow?
Explanation: Orifice plate, venture tube and flow nozzle all these devices are used for flow obstruction. Sphere can’t be used for flow obstruction. Explanation: An orifice plate is a device used for measuring flow rate, for reducing pressure or for restricting flow. It is also used to make temporary flow measurements.
What kind of sensor can measure flow rate?
Rotameters are typically used for low-pressure flow readings; they are most suitable when used for a single fluid. Vortex-shedding sensors detect flow from viscosity-related effects of a blunt object in a flow stream.
Why flow measurement is important?
Measurement of flow, whether it is a liquid or gas, is commonly a critical parameter in many processes. In most operations it is important to know that the right fluid is at the right place at the right time. Some critical applications require the ability to conduct accurate flow measurements to ensure product quality.