Portable Doppler Partically Filled Flow Meter

Portable Ultrasonic Doppler Partically filled Flow Meter
  • Portable Ultrasonic Doppler Partically filled Flow Meter
  • Portable Ultrasonic Doppler Open Channel Flow Meter
  • Handheld Ultrasonic Doppler River Flowmeter

The portable ultrasonic Doppler flowmeter(RBDOF-P) is a convenient metering device developed based on on-site application experience. It follows the principle of simplicity and convenience in many aspects such as assembly, testing, and data collation, aiming to provide users with a good experience. According to various channel types in nature, the product integrates and designs corresponding cross-sectional area calculation formulas. The instantaneous flow can be calculated by the velocity-area method, and the cumulative flow is calculated according to the cumulative time selected by the user. It's a water flow and level monitoring equipment.

 

 

 



 


 

 

Description

  • Principle
  • Features
  • Specification
  • Model Selection
  • Applicants
  • Download
Principle

Doppler Ultrasonic Flow Meter for Open Channel Principle: 

The measurement of an ultrasonic Doppler current meter is based on the Doppler effect. The probe emits an ultrasonic wave obliquely upward (or forward), and the ultrasonic wave propagates in the fluid. The fluid contains impurities such as bubbles or particles (it can be considered that the impurities in the fluid have the same velocity as the water flow). When the ultrasonic wave contacts the impurities in the fluid, the reflected ultrasonic wave will produce a Doppler frequency shift Δf, which is proportional to the flow velocity. The flow velocity of the fluid can be measured by measuring the Doppler frequency shift Δf. 

Features

RBDOF-P Portable Doppler Partically Filled Flow Meter Features:

  • Powered by 2 rechargeable 3.6V 18650 lithium batteries
  • Low-power design with 8-hour continuous operation, compatible with power banks
  • Local cache supports 1 million data entries with historical data export function
  • Standard USB to Type-C data cable included
  • Detachable and extendable bracket
  • 3.5-inch backlit LCD screen
  • Built-in button battery for automatic RTC clock calibration
  • Host supports simultaneous mounting of 2 ultrasonic Doppler flow velocity meters for comparative testing
  • Battery level display on main interface showing power and sensor voltage
  • Multiple channel types available: circular, elliptical, rectangular, trapezoidal, and irregular channels
Specification

RBDOF-P Portable Doppler Partically Filled Flow Meter Specification: 

Power Supply

  • 3.6V lithium battery, input range: 3～5V DC  
  • External sensor voltage adjustment range: 10～24V DC  
  • Battery capacity: 3.6V/5200mAh  
  • System power consumption: 600mAh (continuous operation for 8 hours at 25℃) 
Measurement Performance
  • Flow velocity range: 0.03m/s～5m/s  
  • Water depth range (pressure): 0.02～10m  
  • Flow velocity accuracy: ±(V×1%+0.01)m/s (calibrated by hydrological verification center); ±1%～±3% (affected by field working environment)  
  • Flow velocity resolution: 1mm/s  
  • Water depth accuracy: ±3cm  
  • Water depth resolution: 3mm  
  • Temperature resolution: 0.01℃  
  • Instantaneous flow range: 1L/s～720,000,000m³/h  
  • Instantaneous flow resolution: 0.001m³/s  
  • Cumulative flow range: 0.1L～345,600,000,000m³  
  • Cumulative flow resolution: 0.001L  
  • Data types: water level, flow velocity, temperature, instantaneous flow, cumulative flow  
  • Channel types: circular, rectangular, trapezoidal, irregular 

 

Physical Properties
  • Flow velocity meter material: POM+(ABS+PC)  
  • Handheld unit material: ABS  
  • Bracket material: 304 stainless steel, standard rod length 2.5m (0.5m×5 segments)  
  • Cable material: PU  
  • Cable length: 4-core (single core 0.21mm²) shielded cable with air duct, default 10m factory length, diameter 8mm  
  • Weight: 8.52kg±0.1kg  
  • Handheld unit protection class: IP65  
  •  Flow velocity meter protection class: IP68  
Working Environment 
  • Operating temperature: -5～60℃ (non-freezing)  
  • Storage temperature: -25～80℃


Model Selection

RBDOF-P Portable Doppler Partically Filled Flow Meter Model Selction: 

RBDOF Doppler Open Channel Flow Meter                                                                                                              Model Selection
RBDOF-  Doppler Open Channel Flow Meter
F Fixed type
P Portable Type 
  Level Measure Range
3 3m
10 10m
X xm
  Sensor Material
A ABS
F PTFE
P POM
S  SS316L
X  Other Material
  Power
2 12VDC
4 24VDC
  Output
MA 4-20mA
C2 RS232
C4 RS485
MC 4-20mA+RS232
  Cable Length
1 1m
x Xm(2-50m)


Applicants

RBDOF-P Portable Doppler Partically Filled Flow Meter Applications:

It is mainly applied to natural rivers, irrigation open channels, municipal pipeline networks, hydrological basins and other environments.

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