The F-900V series velocity area open channel flowmeter is an instrument used to measure the liquid flow rate of channels with non full pipes and open discharges. It can be widely applied in industries such as chemical, power, metallurgy, mining, and water conservancy. The production and calibration standards are based on the national "Verification Regulations for Velocity Flowmeters"JJG198-1994。

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◆Product composition

Mechanical components: cross beams, sensor brackets.

●flow converter

By transmitting and receiving ultrasonic signals, the liquid flow velocity is measured using the principle of ultrasonic velocity difference method.

Receive signals from the liquid level gauge and calculate the liquid level depth based on the set liquid level range.

Calculate the instantaneous flow rate and cumulative flow rate of the liquid based on the cross-sectional shape and size of the channel set in the menu

● Chinese display and Chinese operation menu

● Data recording and storage

You can query traffic data for the past 720 hours, 365 days, 36 months, and 10 years.

● Signal output

4-20mA, cumulative pulse, RS-485， Can be connected (or embedded) with GSM/GPRS module for wireless data transmission, and can be paired with a printer.

Ultrasonic velocity sensor

Ultrasonic velocity sensor is a device that realizes the mutual conversion of sound and electricity. When stimulated by electrical pulses, sound waves are generated, and when stimulated by sound waves, an electrical signal is output. Single channel has two sensors, dual channel has four sensors, and triple channel has six sensors. The sensor is fixed on the bracket and immersed in water. Our company's ceramic ultrasonic speed sensor is resistant to friction, corrosion, and has a long service life that can work in water for a long time.

● Liquid level gauge

Ultrasonic level gauge

The liquid level is measured using ultrasonic echo ranging method, and this liquid level gauge is an intelligent non-contact liquid level measuring instrument. Equipped with automatic power adjustment, gain control, temperature compensation, advanced detection and calculation techniques to improve the measurement accuracy of the instrument, and suppression of interference echoes to ensure the authenticity of measurement results. The liquid level gauge is fixedly installed above the channel water level observation point. Probe the head and aim it vertically at the water surface.

Power Supply: DC24V

Output: 4-20mA (four wire system) RS485

Range: 0-2m, 0-5m, 0-10m, 0-15m

Control: Two way relay

Accuracy: 0.25%

Environmental temperature: -25 ℃ to -55 ℃

Protection level: IP67

Resolution: 1mm

Display mode: 16 bit x 2 LCD backlight

Corrosion resistant integrated liquid level gauge

Installation opening size 68mm

Shell material: High strength engineering nylon (PA6 GF30)

Electronic components: flow converter, ultrasonic velocity sensor, liquid level gauge, signal cable.

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●Large measurement range and high accuracy.

Working principle of F-900V series velocity area open channel flowmeter

Using the ultrasonic velocity difference method (the velocity difference caused by the propagation of ultrasonic waves in the direction of liquid flow and in the opposite direction) to measure the average flow velocity V of the liquid, and the level gauge to measure the depth H of the liquid level, when the cross-sectional shape and size of the channel are determined, the liquid flow rate Q in the channel can be calculated. Q=V × H × S (H), where S (H) is the functional relationship between the depth of the liquid level and the cross-sectional area of the water flow.