Ultrasonic open channel flowmeter, also known as weir flowmeter, consists of a liquid level measuring ultrasonic probe and a flow calculation transmitter. Split type split type. Basher trough, also known as Basher trough, is an auxiliary equipment for measuring open channel flow

Ultrasonic open channel flowmeter based on the flow rate – water level calculation method, and the use of flow rate measuring instrument and water level measuring instrument, so as to ensure the accuracy of speed measurement and calculation of a new intelligent flow system, according to the width of the channel and the measurement accuracy requirements, using a single probe method or multi-probe method of open channel flow measurement mathematical model.

According to the actual water level measured by the water level meter and the channel geometry, slope coefficient, channel accuracy, hydraulic ramp, vertical plane correction coefficient of velocity, the microprocessor in the intelligent open channel flow system can calculate the channel flow according to the predetermined mathematical model.

The working principle of the open channel flowmeter is to use the open channel technology to measure the height of the fluid level and then get the flow through the microprocessor inside the instrument. Due to non-contact measurement, open channel flowmeters can be used in harsh environments. Under the control of the microcomputer, the open channel flowmeter transmits and receives the open channel, and calculates the distance between the open channel flowmeter and the measured liquid surface according to the transmission time, so as to obtain the liquid level height. Because there is a certain proportional relationship between the liquid level and the flow rate, the liquid flow rate Q can be obtained according to the calculation formula.

Ultrasonic open channel flowmeter is a flow meter used to measure free surface natural flow in non full tubular open channels. A waterway with non full pipe flow is called an open channel, and the one that measures the flow rate of water in the open channel is called an open channel flowmeter. In addition to circular flow meters, open channel flow meters also come in various shapes such as U-shape, trapezoid, rectangle, etc.

Ultrasonic open channel flowmeter is used in conjunction with a measuring weir to measure the flow rate of water in an open channel. Common open channels include triangular weirs, rectangular weirs, and Bacher troughs. Mainly used to measure the flow rate and irrigation channels of sewage treatment plants, enterprises and institutions’ sewage discharge outlets, urban sewers, etc. Due to the use of non-contact methods for measurement, it has higher reliability than other forms of instruments in the presence of sticky and corrosive liquids.

Product advantages

1. Can measure the flow rate of non full tubes (round tubes, egg shaped tubes, or other irregular tubes);
2. Measurable channel (circular channel, rectangular channel, or other irregular channel) flow rate;
3. Can measure the natural flow of rivers and streams;
4. Can measure the flow rate of sewage discharge channels or pipelines (sewers);
5. Can measure forward and reverse flow velocity and flow rate;
6. Can provide instantaneous and cumulative flow values;
7. Output signals: RS-485, Modbus, 4-20Ma current signal, and multiple switch values;
8. Sensors can work for a long time in harsh environments and sewage quality;
9. Optional SMS or GPRS wireless module for remote telemetry;
10. The sensor housing is made of polycarbonate with a protection level of IP68;
11. Built in automatic temperature compensation;
12. The blind spot can be adjusted to block interference signals near the probe.

property	Technical parameter
Water level Measuring range (m)	0～3.0m
Blind area (m)	0.3m
Overall measurement accuracy	System error ±3‰
Flow measurement range	Depending on the type of weir/trough used, the maximum is 9999m3/h
Operating temperature (℃)	－20℃～+60℃
Minimum water level resolution (mm)	±1mm
Signal output	RS485, 4 ~ 20mA, 2 switch output
reveal	Liquid crystal display
Power supply	DC24V /150mA ；AC220 /100mA
Class of protection	IP65

Ultrasonic open channel flowmeter is applied to all urban water supply and diversion channels; Water diversion and drainage channels, sewage treatment inflow and discharge channels in thermal power plants; Water discharge from industrial and mining enterprises, as well as channels for water conservancy projects and agricultural irrigation.