**Open Channel Flow Meter is used to continuously measure the volumetric flow of conductive liquid in open channels, culverts or Partially Filled Pipes.**

Open Channel Flow Meter continuously measures fluid flow in open pipelines. Such as semi-pipe flow sewage pipes and large flow pipes without overflow weirs. Magnetic Open Channel or Partially Filled Pipe Flow Meter uses the flow rate-area method. The Open Channel Flow Meter measures the flow rate and level of the fluid in the pipeline. The user only needs to input the inner diameter of the round pipe or the width of the square pipe. The non-full pipe flowmeter will automatically calculate the flow rate. Open Channel Flow Meter can measure and display data such as instantaneous flow, velocity, and cumulative flow. Especially suitable for municipal rainwater, wastewater, sewage discharge and irrigation water pipelines.

Sino-Inst offers a variety of Magnetic Flow Meters for flow measurement. If you have any questions, please contact our sales engineers.

## Features of Magnetic Partially Filled Pipe or Open Channel Flow Meter

- Open Channel Flow Meter can be used for flow measurement of open partially filled pipes (round pipes, rectangular pipes or other special-shaped pipes).
- Open Channel Flow Meter can be used for continuous measurement of municipal rainwater, wastewater, sewage discharge and irrigation water pipelines.
- Open Channel Flow Meter can realize forward and reverse two-way flow measurement.
- The sensor can work reliably for a long time under harsh scenes and sewage water quality.
- The measuring range of flow velocity is 0.05-10m/s.
- High flow measurement accuracy. Moreover, it is not affected by factors such as downstream, direct flow, obstruction, etc.
- Large-screen, backlit LCD. The measurement data can be read clearly under strong light or at night.
- The instrument display and output functions are complete. It can display data such as instantaneous flow, flow rate, cumulative flow, and has computer communication interfaces 232, 485 (optional).
- With GSM and GPRS wireless data remote transmission function (optional).
- With power failure timing, counting and clock functions.

**More about : Sewage Flow Meter Selection**

## Specifications of Magnetic Partially Filled Pipe or Open Channel Flow Meter

Nominal diameter | Circular pipe: DN300-DN6000mm Rectangular pipe: width≤6m≤6m |

measurement accuracy | Water level: ±2mm Flow rate: ±1.0% Flow rate: ±1.5% |

Measuring range | Velocity: 0.05-10m/s |

Conductivity of measured medium | ≥20s/cm |

The highest temperature of the measured medium | ≤60℃ |

Display device | Large screen, backlight LCD. Can display instantaneous flow rate, flow rate, cumulative flow and other measurement data at the same time |

Current output signal | 4-20mA/DC (load resistance≤500Ω) |

Pulse output signal | 1-2000HZ |

Digital communication interface | Rs232 and RS485 optional |

Wireless data remote transmission | GSM and GPRS optional |

Power supply | 220V/AC or 12v/DC, 24v/DC |

Extended reading: Magnetic Large Dia. Pipe Flow Meter

## Ultrasonic Open Channel Flow Meter

Ultrasonic open channel flowmeter is used to measure the flow of fluid in the state of free surface of natural flow in a non-full tubular open channel, which is called open channel flow detection.

The measuring tank that is not full is called an open channel. The meter that measures the flow of fluid in the open channel is called an open channel flowmeter.

The ultrasonic open channel flowmeter is composed of three parts: an ultrasonic level gauge, a water measuring tank, and a flow totalizer.

Extended reading: Make Ultrasonic Open Channel Flow Meter Work for You

## Open Channel Flow Meter Working Principle

Based on the flow rate-water level algorithm. Advanced flow rate measuring instrument and water level measuring instrument are adopted. A new type of intelligent flow system to ensure the accuracy of speed measurement and calculation. According to the width of the channel and the requirements of measurement accuracy. Adopted. The mathematical model of single probe method or multi-probe method for open channel flow measurement.

The automatic measurement of open channel flow usually adopts the weir level method or the velocity area method.

**1. Water level method**

The water level method is based on the shape of the open channel and the size of the water flow. A section of flow measuring weir trough is constructed on the open channel. The water level of the weir flow is monitored online. Then the hydraulic formula can be used to calculate the flow through the weir trough.

Water level method Open channel flow meters usually use ultrasonic or microwave radar water level gauges to measure the water level without contact. Ultrasonic or microwave radars use the principle of echo reflection to achieve water level measurement.

**2. Velocity area method**

The flow velocity area method is a commonly used flow measurement method in open channels. There is no need to build water measuring structures. The flow rate is obtained by measuring the flow velocity and the area of the cross section.

Flow velocity area method Open channel flowmeter is a device for automatic measurement of open channel flow using velocity area method composed of flow indicator, flow meter and liquid level meter.

The flow meter can choose electromagnetic flowmeter or Doppler flow tester. If an electromagnetic flowmeter is selected, the flow rate indicator will convert the flow rate signal into a digital signal proportional to the flow rate signal, thereby realizing the flow rate measurement.

If it is a full tube measurement, then you may need to know: Using of Electromagnetic Flow Meters.

Extended reading: Ultrasonic Insertion Flow Meter for Lined/Large Pipes

## More Featured Pipe Flow Meters

Read more about: Shop 101: Key Factors In Selecting A Pipe Flow Meter

**Sino-Inst offer over 10 Open Channel Flow Meters, with Best Price.**

A wide variety of **Open Channel Flow Meters** options are available to you, such as free samples, paid samples.

About 13% of these are magnetic flow meter, 14% are Insertion Magnetic Flow Meter, 25% are Venturi flow meter, 13% are Handheld ultrasonic flow meter, and others are Liquid Turbine Flow Meters.

Sino-Inst is Open Channel Flow Meters suppliers, located in China. Open Channel Flow Meters products are most popular in North America, Mid East, and Eastern Europe. The United States, and India, which export 99%, 1%, and 1% of Open Channel Flow Meter respectively.

Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.

Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.