SKU: SENS-0664
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YF-S201 Water Flow Sensor 1–30 L/min Black - Hall Effect Pulse Output

₹187.00 (Inclusive of all taxes)
Out of Stock

The YF-S201 is a hall-effect-based inline water flow sensor compatible with 5V–18V DC systems, including Arduino and Raspberry Pi platforms. It provides a pulse output for measuring flow rates from 1 to 30 liters per minute, suitable for monitoring liquid consumption in various applications.

Features

  • Inline Hall-effect flow sensor with 1–30 L/min measurement range.
  • Operates from 5V to 18V DC with low 15mA current draw.
  • Outputs a pulse signal (~450 pulses per liter) for easy flow rate calculation.
  • Rated for water pressures up to 1.75 MPa and temperatures from -20°C to 80°C.
  • Compact design with 20mm outer diameter for easy integration into water lines.

Out of stock

Description

The YF-S201 water flow sensor utilizes a sealed magnetic hall effect sensor coupled with an internal pinwheel rotor. As fluid passes through the sensor body, the rotor spins, and the hall sensor generates a corresponding electrical pulse for each revolution. This pulse output provides a direct, non-contact method for flow measurement, keeping the electronics isolated from the water path.

Designed for basic flow monitoring, the sensor offers an accuracy of approximately ±10% and requires system-specific calibration for higher precision applications. Its robust construction supports a wide operating temperature range and withstands pressures up to 1.75 MPa, making it suitable for integration into DIY projects, irrigation systems, and simple industrial monitoring setups.

Key Features

  • Hall-effect sensing principle ensures sealed, non-contact measurement.
  • Wide operating voltage range (5–18V DC) for compatibility with 5V and 12V logic systems.
  • Durable plastic housing rated for water pressure up to 1.75 MPa.
  • Simple three-wire interface (VCC, GND, Signal) for straightforward integration.
  • Pulse output frequency scales linearly with flow rate (F ≈ 7.5 * Q L/min).
  • Compact form factor (62.5mm length, 20mm OD) for inline installation.
  • Suitable for a broad temperature range from -20°C to +80°C.
  • High-value build optimized for reliable performance in basic flow monitoring tasks.

Applications

  • DIY water flow monitoring for hydroponics and aquaponics systems.
  • Liquid consumption tracking in residential or light commercial irrigation controllers.
  • Coolant flow rate monitoring in 3D printer or CNC machine cooling loops.
  • Basic flow verification in laboratory fluid handling setups.
  • Water usage data logging for solar thermal or simple industrial process control.

Technical Specifications

Model NumberYF-S201
Flow Rate Range1 to 30 L/min
Operating Voltage5 to 18 V DC
Max Current Draw15 mA @ 5V
Output SignalDigital Pulse (Hall Effect)
Pulse Characteristics~450 pulses per liter
Maximum Water Pressure≤ 1.75 MPa
Accuracy±10%
Operating Temperature-20°C to +80°C
Operating Humidity35% to 80% RH
Output Duty Cycle50% ±10%
Rise Time0.04 µs
Fall Time0.18 µs
Outer Diameter20 mm
Length62.5 mm
Width36 mm
Weight50 g

Frequently Asked Questions

What is the output signal of the YF-S201 sensor and how do I interface it with an Arduino?

The YF-S201 outputs a digital pulse signal via its yellow wire. Each pulse corresponds to approximately 2.25 mL of fluid. Connect the red wire to 5V, black to GND, and yellow to a digital interrupt pin on the Arduino. Use the provided example sketch to count pulses and calculate flow rate in L/min or L/hour.

What is the operating voltage range and current consumption?

The sensor operates from 5V to 18V DC, with a minimum tested voltage of 4.5V. At 5V, the maximum current draw is 15mA. Ensure your power supply can provide a stable voltage within this range for reliable operation.

What is the accuracy and how should I calibrate this sensor?

The sensor has a typical accuracy of ±10%. For improved precision, perform a system-specific calibration. Measure a known volume of water through the sensor, count the output pulses, and calculate a calibration factor (pulses per liter) for your specific setup and flow conditions.

What are the pressure and temperature limits for this flow sensor?

The maximum working water pressure is 1.75 MPa. The operating temperature range is -20°C to +80°C. Do not exceed these limits to prevent damage to the sensor housing and internal components.

Can this sensor be used with liquids other than water?

While designed for water, it may work with other low-viscosity, non-corrosive liquids. However, calibration will differ, and the hall effect sensor's sealing is rated for water compatibility. Avoid corrosive or abrasive fluids, as they may damage the internal rotor or seals.

Package Includes

  • 1 x YF-S201 Water Flow Sensor (Black)

Additional Information

Weight 0.05 kg
Dimensions 6.25 × 3.6 cm