Doppler Flow Meter- Clamp On

Doppler ultrasonic flow meter is designed for measuring the flow of liquid and slurry containing certain solid impurities and bubbles in closed pipes. The sensor is installed outside the pipe and does not contact the fluid. Therefore, it is not affected by pipe dirt and blockage. It does not require flow cutoff for installation and maintenance. Due to the characteristics of the broken pipe, it is quick to install and easy to verify， and maintain.

Contact measurement
High accuracy and real-time performance
Adaptability
Strong anti-interference ability
Remote monitoring and intelligent integration
Uses the ultrasonic Doppler principle to measure flow velocity and flow
Low starting velocity
Can measure instantaneous flow and cumulative flow
Uses a frequency domain Doppler analysis algorithm
Simple installation, no auxiliary engineering facilities required

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Introduction of Doppler Flow Meter- Clamp On

Doppler ultrasonic flowmeter-Clamp-On is designed for measuring the flow of liquids and slurries containing certain solid impurities and bubbles in closed pipes. The sensor is installed outside the pipe and does not contact the fluid. Therefore, it is not affected by pipe dirt and blockage, and does not require a flow cutoff during installation and maintenance. It is quick to install and easy to verify and maintain.

The doppler ultrasonic flowmeter uses the Doppler effect of sound waves propagating in the fluid. By measuring the Doppler frequency shift of sound waves scattered by moving particles in the fluid, the velocity of the fluid can be obtained. Combined with the built-in pressure water level meter, the velocity area method can be used to measure the flow of the liquid. It is suitable for flow velocity and flow measurement in open channels, rivers and difficult-to-build standard sections, as well as flow velocity and flow measurement in various full and non-full pipe open channels.

You can also refer to other products for measuring flow: ultrasonic flow meters and electromagnetic flow meters.

You can also get more information about flow meters:

Portable Ultrasonic Flow Meters | Clamp-on Ultrasonic Flow Measurement

Technical Parameters of Doppler Flow Meter- Clamp On

Transmitter
Measurement principle	Ultrasonic doppler
Measurable flow rate range	0.05 – 12 m/s, bidirectional measurement
Repeatability	0.20%
Accuracy	0.5% – 2.0% F.S.
Response time	2-60 seconds, optional
Measurement period	500ms
Pipe diameter range	25-4000 mm
Measurable fluid	Reflectors (particles or bubbles) with content exceeding 100ppm, and particle size >100 microns
Power supply	AC: 85-265V DC: 24V/500mA
Installation method	Wall-mounted
Protection level	IP66
operating temperature	-20℃ to +60℃
Housing material	fiberglass
Display	2-line 8-digit LCD, 8-digit instantaneous flow, cumulative flow (resettable)
Units of measurement	Volume/mass/speed: liters, cubic meters, kilograms, meters, gallons, etc.; flow time unit: seconds, minutes, hours, days; cumulative flow rate: E-2 ~ E+6
Communication output	4~20mA, totalizer pulse output, instantaneous flow alarm, error alarm and power interruption alarm
Press button	6 buttons
Dimensions	244196144mm
Weight	2.4kg

Sensor:
Protection level	Standard IP65, IP67, IP68 optional
Measurable fluid temperature	Standard sensor: -35℃~80℃, the temperature can be measured up to 120℃ in a short time
Measurable fluid temperature	High temperature sensor: -35℃~200℃, the temperature can be measured up to 250℃ in a short time
Testable pipeline	S type (25-4000 mm)
Sensor size	60(h)34(w)33(d)mm
Sensor material	Aluminum alloy (standard temperature sensor), high temperature sensor (Peek)
Cable length	Standard 10m, other lengths can be customized

Get a Quick Quote of Doppler Flow Meter- Clamp On

Sino-Inst’s Doppler flowmeter can measure the flow of liquids containing impurities and foam. We have professional engineers and rich experience in instrument measurement, please contact us! We will give you a suitable price and fast shipment.

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Radar Level Meter

Paperless Recorder

Solid Powder Flowmeter

Float Level Sensors / Switches

Capacitive level sensor

Level Switches/Controllers

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Applications of Doppler Flow Meter- Clamp On

Application areas
Oil and gas
Chemical industry
Water treatment
Food and beverage
Heating system
Metallurgy industry
Environmental monitoring

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Working Principle of Doppler Flow Meter- Clamp On

The flow velocity measurement of the Doppler ultrasonic flowmeter is based on the Doppler effect. The probe emits a beam of ultrasonic waves obliquely upward. The ultrasonic wave propagates in the fluid. The fluid will contain impurities such as bubbles or particles (it can be considered that the impurities in the fluid are consistent with the speed of the water flow). When the ultrasonic wave contacts the impurities in the fluid, the reflected ultrasonic wave will produce a Doppler frequency shift △f; the Doppler frequency shift is proportional to the flow velocity. By measuring the Doppler frequency shift △f, the flow velocity of the fluid can be measured.

Order Guide of Doppler Flow Meter

Pipe wall thickness, outer diameter, and medium
Whether the flow in the pipe contains impurities
Measure the temperature of the medium
Select the model reasonably according to the actual situation of the user and the measurement needs
Consider the calibration cycle, spare parts cost and power consumption
Choose a model that supports fieldbus or wireless transmission
Consider imported brands or domestic brands
Consider external clamp type, plug-in type or pipe segment type