# Flow Measurement

## Flow metering principles - Orifice, Venturi, Flow Nozzles, Pitot Tubes, Target, Variable Area, Positive Displacement, Turbine, Vortex, Electromagnetic, Ultrasonic Doppler, Ultrasonic Time-of-travel, Mass Coriolis, Mass Thermal, Weir V-notch, Flume Parshall and Sluice Gate flow meters and more

### Bernoulli Equation

Conservation of energy - non-viscous, incompressible fluid in steady flow

### California Pipe Flow Metering Method

Measure discharge from the open end of partially filled horizontal pipes

### Comparing Flowmeters

A limited comparison of flowmeter principles - regarding service, rangeability, pressure loss, typical accuracy, upstream pipe diameters, viscosity and relative costs

### Dynamic or Absolute Viscosity Converting Chart

Dynamic viscosity converting chart with units like *Poiseuille - Poise - centiPoise and more*

### Electromagnetic Flowmeters

An introduction to electromagnetic flowmeters and their principles

### Flow Rate Calculated with the Velocity-Area Principle

Calculate flow rate or discharge in an open conduit, channel or river based on the velocity-area principle

### Flowmeter Accuracy

Introduction to accuracy in flow measurement devices

### Flowmeters and Turndown Ratio - Rangeability

Turndown ratio for flow measurement devices like orifices, venturi meters etc.

### Horizontal Pipes - Discharge Flow vs. Length of Discharge Flow

Volume flow from horizontal pipes

### Manning's Formula for Gravity Flow

Open channel slope area flow metering

### Measurement of Water Flow

A manual providing guidance in selecting, managing, inspecting, and maintaining water measurement devices - describes standard methods and devices commonly used to measure irrigation water

### Orifice, Nozzle and Venturi Flow Rate Meters

The orifice, nozzle and venturi flow rate meters use the Bernoulli Equation to calculate fluid flow rate using pressure difference through obstructions in the flow

### Pitot Tubes

Pitot tubes can be used to indicate fluid flow velocities by measuring the difference between the static and the dynamic pressures in fluids

### Sluice Gate Flow Measurements

Sluice gates are used for controlling and measuring flow rates in open channels and rivers, mainly in connection to hydro power plants

### Target Flow Meters

An introduction to the target flow meters principles

### Types of Fluid Flow Meters

An introduction to different types of fluid flowmeters - Orifices, Venturies, Nozzles, Rotameters, Pitot Tubes, Calorimetrics, Turbine, Vortex, Electromagnetic, Doppler, Ultrasonic, Thermal, Coriolis

### U-Tube Manometer

The inclined and vertical u-tube manometers are inexpensive and common in the differential pressure measurement with flow meters like pitot tubes, orifices and nozzles

### Ultrasonic Doppler and Time of Flight Flow Meters

An basic introduction to the ultrasonic Doppler and Time of Flight Flow Meters

### Vertical Pipes - Discharge Flow vs. Height of Discharge Flow

Volume flow from vertical water pipes

### Vortex Flowmeters - a Tutorial

An introduction to vortex flowmeters

### Vortex Shedding Frequency and Volume Flow Rate

The vortex shedding frequency created around a bluff body and flow rate

### Weirs - Flow Measurement Standards

Standards of weir flow measurements

### Weirs - Open Channel Flow Rate Measurement

Weirs can be used to measure flow rates in open channels and rivers - common for water supply and sewage plants

### Weirs V-Notch Flow Calculator

Online V-Notch weirs flow calculator