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DFS5.1 Doppler Type Flow Switch

DFS5.1 Doppler Type Flow Switch
Contact output model.
Easy installation because it equips only one sensor.
Suitable for turbid liquid such as waste water, slurry, sludge etc.
Check the flow velocity change with LED bar graph on the controller.
Applicable pipe diameter φ12.5mm~φ4500mm.

Model

PF330A/330B/330D

PF220A/220B

Power Source

110~240VAC ±10%

110~240VAC ±10%

Battery

Battery Life-20 hours from fully charged, depending on load.

Battery Life-20 hours from fully charged, depending on load.

Allowable Temperature

Controller:-20℃~+50℃
Sensor:PF330A/B -20℃~+135℃
PF330D -20℃~+80℃

Controller:-20℃~+50℃
Sensor:-20℃~+135℃

Pipes

PF330A:13 OD ~ 115mm OD
PF330B:50 OD ~ 2000mm OD
PF330D:1500 OD ~ 5000mm OD

PF220A:13 OD ~ 115mm OD
PF220B:50 OD ~ 1000mm OD

Velocity

0.1m/sec~20m/sec
bi-directional

0.1m/sec~20m/sec
bi-directional

Display
(Flow Velocity)

m/sec、f/sec

m/sec、f/sec

Display
(Volumetric Flow)

m³、Gullons、US Gullons、
ℓ、Barrel

m³、Gullons、US Gullons、
ℓ、Barrel

Output

DC0~20mA/4~20mA 0.1%FS
One Pulse/sec MAX USB/RS232C

DC0~20mA/4~20mA 0.1%FS
One Pulse/sec MAX

Accuracy

13mm~75mm±3%(0.2m/sec over)
75mm以上 ±0.5%~2%(0.2m/sec over)

13mm~75mm±3%(0.2m/sec over)
75mm以上 ±0.5%~2%(0.2m/sec over)

 

Model

DFM5.1

DFS5.1

Power Source

100~240VAC 50/60Hz 30W
9~32VDC Max 9W(Option)

100~240VAC 50/60Hz 2.0W Max.
12~24VDC Max 3.0W(Option)

Allowable Temperature

Controller:-23℃~+60℃
Sensor:-40℃~+150℃

Controller:-23℃~+60℃
Sensor:-40℃~+150℃

Pipe

12.5 ID ~ 4500mm ID
(15mm OD Min)

12.5 ID ~ 4500mm ID
(15mm OD Min)

Velocity

0.076m/sec~12.2m/sec
bi-directional

0.075m/sec~3m/sec
(ON/OFF Adjustment)

Output

DC4~20mA(Resistance Load 1000Ω)

 

Output Contact

SPDTx2 (AC240V 5A)

DPDTx5

Accuracy

±2% FS
Repeatability ±0.1%
Linearity ±0.5%

±2% FS
Repeatability ±0.1%

 

Operating Principles

Transit Time Type
Ultrasonic waves are transmitted into a liquid alternately from the 2 sensors attached to the outside of the pipe, and difference between the propagation time of the ultrasonic wave in the upstream direction and the propagation time in the downstream direction is detected to obtain the flow velocity. Then, the flow rate is calculated by multiplying the cross section area of the pipe diameter.

Doppler Type
The sensor transmits ultrasonic into the liquid through the pipe wall. Ultrasonic reflects the granules or air bubbles in the liquid. When the liquid flows, echos come back to the sensor with a different frequency besed on the flow velocity. We can calculate the flow velocity based on the frequency change.