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Flow Sensor

Flow Sensor Measures 1 to 30L/minute

  • Measure flow from 1 to 30 Liters per minute
  • Sealed integrated magnetic hall effect sensor outputs an electrical pulse with every revolution
  • Standard 1/2 inch nominal pipe connection
  • 5V TTL output
  • 15cm (5.9 inches) cable length
  • Compatible with many Dataq Instruments hardware products including DI-2108, DI-2108-P, DI-4108, DI-4208, and DI-4718B (with appropriate 8B module) models
  • Learn how to connect and measure Flow with the 1-30L/min flow sensor
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YF-S201 Flow Sensor


The YF-S201 Flow Sensor sensor measures 1 to 30L/min when connected to a Dataq Instruments Data Acquisition product or Data Logger.

The YF-S201 Flow Sensor (Dataq part number 2000362) allows Dataq Instruments data acquisition and data logger units to acquire flow rate (L/sec) information. The combination of these two products provides a compact solution, with sensor excitation provided by the data logger. The logger itself allows data to be communicated to a connected PC over either a USB or Ethernet interface. Optionally, many data loggers can store data to a removable USB thumb drive to satisfy stand-alone applications. Even with a connected flow sensor, the data logger channel capacity allows additional channels of information to be acquired and correlated with flow information to satisfy nearly any level of measurement expansion.


No Accessories available for this product.


Measurement Range: 1 to 30 Liters/Minute
Sensor Type: Hall Effect
Working Voltage: 5 to 18V DC
(min tested working voltage 4.5V)
Max current draw: 15mA @ 5V
Output Type: 5V TTL
Working Temperature range: -25 to +80°C
Working Humidity Range: 35%-80% RH
Accuracy: ±10%
Maximum water pressure: 2.0 MPa
Output duty cycle: 50% +-10%
Output rise time: 0.04us
Output fall time: 0.18us
Flow rate pulse characteristics: Frequency (Hz) = 7.5 * Flow rate (L/min)
Pulses per Liter: 450
Durability: minimum 300,000 cycles
Cable length: 15cm
Pipe Connections: 1/2” nominal pipe connections, 0.78” outer diameter, 1/2” of thread
Overall Dimensions: Size: 2.5” x 1.4” x 1.4”
Wiring: Red for +5V
Black for GND
Yellow for CH+

Logger inaccuracy not included in these specifications.

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