Understanding Vortex Flow Meters

Vortex flow meters are a type of flow meter that measures the flow rate of a fluid by detecting the frequency of vortices shed by a bluff body in the flow stream. These meters are commonly used in a variety of industries, including oil and gas, chemical processing, water and wastewater, and Food And Beverage.


The principle behind vortex flow meters is based on the Von K\u00e1rm\u00e1n effect, which states that when a fluid flows past a bluff body, such as a cylinder or a sphere, vortices are shed alternately from each side of the body. The frequency of these vortices is directly proportional to the flow rate of the fluid, allowing for accurate measurement of flow.

One of the key advantages of vortex flow meters is their ability to measure flow in a wide range of fluid conditions, including high temperatures and pressures. They are also relatively easy to install and maintain, making them a popular choice for many applications.

There are two main types of vortex flow meters: insertion and inline. Insertion vortex flow meters are installed directly into the flow stream, while inline vortex flow meters are mounted in the pipe. Both types have their own advantages and disadvantages, depending on the specific application requirements.

In addition to measuring flow rate, vortex flow meters can also provide information on the temperature and pressure of the fluid being measured. This makes them a versatile tool for process control and monitoring in a wide range of industries.

One of the key considerations when using vortex flow meters is the size and shape of the bluff body. The size of the bluff body will affect the frequency of the vortices shed, while the shape will determine the stability and accuracy of the measurement. It is important to select the right bluff body for the specific application to ensure accurate and reliable measurements.

Another important factor to consider when using vortex flow meters is the Reynolds number of the flow. The Reynolds number is a dimensionless quantity that describes the flow regime of a fluid, and it can affect the accuracy and performance of the flow meter. It is important to ensure that the flow conditions are within the recommended range for the vortex flow meter to operate effectively.

Model EC-1800 Online Conductivity Controller
Range 0-2000/4000uS/cm 0-20/200mS/cm
Accuracy 1.5%, 2%, 3%(FS)
Temp. Comp. Automatic temperature compensation based on 25\u2103
Oper. Temp. Normal 0\uff5e50\u2103; High temp 0\uff5e120\u2103
Sensor C=0.1/1.0/10.0cm-1
Display 128*64 LCD Screen
Communication 4-20mA output/2-10V/1-5V/RS485
Output High/Low limit dual relay control
Power AC 220V\u00b110% 50/60Hz or AC 110V\u00b110% 50/60Hz or DC24V/0.5A
Working Environment Ambient temperature:0\uff5e50\u2103
Relative humidity\u226485%
Dimensions 96\u00d796\u00d7100mm(H\u00d7W\u00d7L)
Hole Size 92\u00d792mm(H\u00d7W)
Installation Mode Embedded

In conclusion, vortex flow meters are a versatile and reliable tool for measuring flow rate in a wide range of industries. Their ability to provide accurate measurements in a variety of fluid conditions makes them a popular choice for many applications. By understanding the principles behind vortex flow meters and considering key factors such as bluff body size and shape, Reynolds number, and installation type, users can ensure accurate and reliable flow measurement for their specific needs.