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Digital Flow Sensor NPF3W5 Series

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  • NPF3W5

  • NNT

NPF3W5 Digital Flow Sensor

Applicable fluidWater and Ethylene glycol aqueous solution (with viscosity of 3 mPa·s [3 cP] or less)
Detection methodKarman vortex
Rated flow range0.5~4L/min2-16L/min5-40L/min10~100L/min50~250L/min
Fluid temperature0 to 90°C (No freezing or condensation)
AccuracyDisplay value: ±3% F.S. Analog output: ±3% F.S.
Repeatability±2% F.S
Temperature characteristics±5%F.S. (25°C standard)
Operating pressure range0-1MPa
Proof pressure45 kPa or less at the maximum flow60 kPa or less at the maximum flow
Analog outputResponse time
Voltage outputVoltage output: 1-5V  Output impedance: 1kΩ
Current outputCurrent output: 4-20mA  Max load impedance: 300Ω for DC12V, 600Ω for DC24V
Indicator lightFor power supply status, flow rate indicator(Blinking speed changes in response to flow rate), and other error indicator
Power supply voltageDC12~24V±10%
Current consumption30mA or less
Operating temperature range0 to 50°C (No freezing or condensation)
Op erating humidity ranOperation, Storage: 35 to 85% R.H. (No condensation)
Withstand voltage *41000 VAC for 1 minute between terminals and housing
Insulation resistance50 MΩ or more (500 VDC measured via megohmmeter) between terminals and housing
Standards and regulationsCE
Wetted parts materialPPS, SUS304. FKM. SCS316
Piping port size 63/81/23/4111/2

Flow Sensor Core Part

Digital Flow Sensor NPF3W5

Flow Sensor Flow Sensor

Water sensor

Specially used for water flow sensing to transfer data to the main board

Flow Sensor Circuit Board

Main board

Store memory data, record data, real-time display

Flow Sensor Function Board

Function board

Achieve the switch between functions and applications of rapid response

Flow Sensor Order Model Type

Flow Sensor NPF3W

NNT Strength

Manufacture Department

Production Line

Electric Manufacture Department

Testing Center




Vortex frequency: V: flow velocity; K: proportional constant (depending on the size and state of the vortex generator) and then the fluid frequency is detected.

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