Doppler current meter

1.Doppler current meterproduct introduction

Doppler flow meter is a handheld flow meter that uses ultrasonic detection technology to measure real-time flow rate or section flow data with laboratory accuracy with the touch of a few keys.Doppler current meter is a velocity and flow detection instrument used in rivers, open channels and pipelines. It uses ultrasonic detection technology, has high measurement accuracy, good stability, is less affected by environmental factors, has no rotating parts, has low maintenance frequency and high working reliability. It is the preferred product for portable velocity and flow measurement.

Applications: sponge cities, river chief management, inland river monitoring, natural rivers, open channels, pipelines, aquaculture and other scenarios.

Principle: The frequency difference between the transmitted and received ultrasound waves is related to the flow rate, and the time difference between the transmitted and received ultrasound waves is related to the liquid level. The static pressure level is used for working conditions that require a large liquid level measurement range, and the ambient temperature measurement is used to correct the actual propagation speed of the ultrasound wave.

2. Doppler current meter product features

The sensor supports instantaneous flow and cumulative flow functions

Can measure the flow rate of still water

Able to measure flow in partially full pipes, full pipes and open channels

Can measure flow in rectangular, circular, trapezoidal and triangular cross sections

Wide flow rate measurement range, 0~10m/s, bidirectional

High flow rate measurement accuracy, 1mm/s error

Ultrasonic measurement of liquid level has high accuracy, with an error of 1mm (within 2m)

Pure physical method measurement, no calibration required

Support static pressure level measurement

Support temperature compensated flow rate measurement and liquid level measurement

ModbusRTU protocol

The sensor protection level is IP68, supporting long-term underwater operation

Portable solution: sensor + handheld device + measuring rod, suitcase to accommodate all accessories

Suitcase size: 435*320*135mm

3. Doppler current meter technical parameters

Handheld performance

Handheld device size	187*91*30mm
weight	0.3kg
storage temperature	-20℃~60℃
Relative humidity	5%~85% (no condensation)
Protection level	IP67
charging method	Direct charge
Standby time	Continuous working for 8 hours
Display parameters	Flow rate, liquid level, temperature, flow
On-site display	4.3-inch touch screen with backlight
Digital Interface	RS485 interface, Modbus protocol.

Flow rate range	0～10m/s
Flow rate resolution	0.001m/s
Flow rate accuracy	0.001m/s (flow velocity <=5m/s); 0.02m/s or 0.3% of the actual peak velocity (the larger value is used) (flow velocity >5m/s)
Ultrasonic level range	6.5m
Ultrasonic level accuracy	0.001m
Ultrasonic level resolution	0.0005m
Static pressure level range	0~10m(customized)
Hydrostatic level accuracy	±0.5%FS
Hydrostatic level resolution	0.001m
Temperature range	-20~60℃

Sensor size	165*50*29.5mm
Install	Special bracket
Material	Metal, plastic, rubber
Protection level	IP68

powered by	DC 12V/24V
Power consumption	When measuring <70mA; when sleeping <25mA
Communication Interface	RS485, Modbus
Operating temperature	-20~60℃
Work Pressure	Max 6Bar
Lightning protection	support
Surge protection	support
EM I inhibition	support