Ultrasonic Flow Meters

20+ Years Manufacturing Experience

DOF6000-W Wall-mounted Serials

Short Description:

The DOF6000 series flowmeter consists of Flow calculator and the Ultraflow QSD 6537 Sensor.

The Ultraflow QSD 6537 Sensor is used to measure water velocity, depth, and conductivity of water flowing in rivers, streams, open channels and pipes. When used with a companion Lanry DOF6000 Calculator, flow rate and total flow can also be calculated.
The flow calculator can calculate the cross-sectional area of partially filled pipe, open channel stream or river, for stream or river, with up to 20 coordinate points describing the river’s shape of cross section. It is suitable for various applications.

Ultrasonic Doppler Principle in Quadrature Sampling Mode is utilised to measure water velocity. The 6537 Instrument transmits ultrasonic energy through its epoxy casing into the water. Suspended sediment particles, or small gas bubbles in the water reflect some of the transmitted ultrasonic energy back to the 6537 Instrument’s ultrasonic receiver instrument that processes this received signal and calculates the water velocity.

Water depth is measured with two methods. An ultrasonic depth sensor measures water depth using the ultrasonic principle from a top mounted sensor on the instrument. Depth is also measured using the pressure principle from a bottom mounted sensor in the instrument. These two sensors provide flexibility in depth measurement. Some applications, for example measuring from the side of a pipe, better suits a pressure principle, while other applications in clear open channels better suit an ultrasonic principle.

The 6537 Instrument has a 4 electrodes conductivity instrument (EC) included to measure the quality of the water, with four electrodes exposed to the water at the top of the instrument. Water quality is measured on an ongoing basis and this parameter can be recorded along with velocity and depth to better analyse the nature of the water in open channels and pipes.



20 coordinate points to describe cross section of the river's shape.


One instrument can measure the velocity, depth and conductivity simultaneously.


Velocity Range : 0.02mm/s to 13.2m/s bi-directional, accuracy is ±1% R. Flow rate range is optional (0.8m/s; 1.6 m/s; 3.2 m/s; 6.4 m/s;13.2m/s).


Pressure Depth Range: 0 to 10m; Accuracy: ±2mm. Ultrasonic Depth Range: 0.02-5m; Accuracy: ±1mm.


Measure velocity in both forward flow and back flow.


Depth is measured by both the pressure sensor and ultrasonic level sensor principles.


With borometric pressure compensation function.


IP68 Epoxy-sealed body design, designed under water installation.


RS485/MODBUS output, connect to computer directly.



Velocity Velocity range: 20mm/s-0.8m/s; 20mm/s-1.6m/s; 20mm/s-3.2m/s (default); 20mm/s- 6.4m/s; 20mm/s-13.2m/s
Bidirectional velocity capability
Velocity accuracy: ±1 % R
Velocity resolution: 1 mm/s
Depth (Ultrasonic) Range: 20mm to 5000mm (5m)
Accuracy: ± 1mm
Resolution: 1 mm
Depth (Pressure) Range: 0mm to 10000mm (10m)
Accuracy: ± 2mm
Resolution: 1 mm
Temperature Range: 0°C to 60°C
Accuracy: ±0.5°C
Resolution: o.1°C
Electrical Conductivity (EC) Range: 0 to 200,000 µS/cm, Typically ± 1% of measurement
Accuracy ±1% R
Resolution ±1 µS/cm
Recorded as a 16-bit value (0 to 65,535 µS/cm) or a 32-bit value (0 to 262,143 µS/cm)
Tilt (Accelerometer) Range: ±70° in roll and pitch axes.
Accuracy: ±1 ° for angles less than 45°
Output SDI-12: SDI-12 v1.3, Max. cable 50m
RS485: Modbus RTU, Max. cable 500m
Environmental Operating temperature: 0°C 〜+60°C water temperature
Storage temperature: -20°C 〜+60°C
IP class: IP68
Others Cable: The standard cable is 15m, the maximum option is 500m.
Sensor material: Epoxy-sealed body, Marine Grade 316 Stainless Steel Mounting Bracket
Sensor size: 135mm x 50mm x 20mm (L x W x H)
Sensor weight: 1 kg with 15m of cable
DOF6000-W Wall-mounted Serials2

Sensor Functions




Power supply:

Calculator: 220VAC& 12-24VDC; Sensor:12VDC

IP class:

Calculator: IP66

Operating temperature:

0°C ~+60°C

Case material:

Fiber Glass


4.5" color LCD


Pulse, 4-20mA (Flow & Depth), RS485/Modbus, Datalogger, GPRS


244L×196W×114H (mm)



Data storage:



Partially Filled Pipe: 150-6000mm; Channel: width >200mm

Installation Details

DOF6000-W Wall-mounted Serials3

Partially Pipe

DOF6000-W Wall-mounted Serials4

Pipe with Siltation on Bottom

DOF6000-W Wall-mounted Serials5

Triangle Channel

DOF6000-W Wall-mounted Serials6

Rectangular channel

DOF6000-W Wall-mounted Serials7

Polygonal channel

DOF6000-W Wall-mounted Serials8

Irregular-shaped channel

Configuration Code

DOF6000   Doppler open channel fiow meter        
    W   Wall-mounted                       
        Power supply                  
        A   85-265VAC                      
        E   24VDC(only for Wall-mounted Caculator)                      
            N Same as above            
            C 4-20mA            
            P Pulse            
            F RS485(Modbus)            
            D Data logger            
            G GPRS            
            Level range            
            6537 0 to 10m          
                Sensor cable length    
                15m      15m(standard)    
                XXm      more length, please contact us    
DOF6000 W A N NL — 6537 — 15m (example configuration)    

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