open channel flow meter types

Open channel flow meter is an instrument used in open channels or channels to measure water flow. According to different classification standards such as measurement principle,
installation method, and measurement medium, open channel flowmeters can be divided into many types. The following is a detailed classification of open channel flowmeter types:

 

1. Classification by measurement principle

 

Velocity open channel flow meter:

 

Principle: Determine the flow rate by measuring the water flow velocity.

 

Composition: Usually composed of sensors and controllers. The sensors capture the water flow velocity signal and convert it into an electrical signal to transmit to the controller. The
controller calculates the flow rate according to the preset formula and displays it.

Volumetric open channel flowmeter:

 

Principle: Measure the flow rate according to the volume occupied by the water flow.

 

Composition: It consists of a timer and a weir. The timer records the time for the water flow to pass through the weir, and then calculates the flow rate according to the preset formula.

 

Special types:

Ultrasonic open channel flowmeter: Use ultrasonic technology to measure the water flow velocity or liquid level, and then calculate the flow rate. It has the advantages of large measurement
range, high accuracy, and easy installation.

 

Doppler open channel flowmeter: Adopts the principle of Doppler effect to calculate the flow rate by measuring the movement speed of scatterers in the water flow. Suitable for measuring
fluids containing solid particles or bubbles.

Multi-channel open channel flowmeter: Use multiple channels to measure water flow velocity at the same time, and improve measurement accuracy through data processing. Suitable for
occasions with high measurement accuracy requirements.

 

2. Classification by installation method

Insertion open channel flowmeter:

Features: It consists of a measuring tube and a measuring head, which can be easily installed in existing pipes and adapt to fixed pipes of various calibers.

Fixed open channel flowmeter:

Features: It consists of a measuring slot and a measuring head, with high measurement accuracy and stability, and is more suitable for large-scale water conservancy projects and important
water supply areas.

 

3. Classification by measurement medium

Liquid open channel flowmeter:

Composition: It consists of pipes, weirs, timers, etc.

Classification: According to the different types of liquids, it is divided into closed and open types. The closed type is suitable for measuring liquids with higher viscosity, and the open type is
suitable for measuring liquids with stronger fluidity.

Gas-liquid open channel flowmeter:

Composition: It consists of pipes, throttling devices, pressure sensors, etc.

Classification: According to the different types of measured gases, it is divided into constant temperature difference and mass flowmeter types.

 

4. Other types

In addition to the above categories, there are some special types of open channel flowmeters, such as Pitot tube type (rotating drum type), orifice plate type, Venturi tube type, etc.
These flow meters have their own characteristics and are suitable for different measurement occasions.

 

If you want to buy an open channel flow meter and want to know the specific selection and quotation, please consult CIXIFM winny:

Email: sales01@cxflowmeter.com

whatsapp: 008618049841995