YF-S201- Water Flow Measurement Sensor

Description of the YF-S201

YF-S201 is a water flow measurement sensor with high-grade quality sealing property. It works on the Hall effect principle and with a flow rate range of 1~30L/min. The module has three pins: Power, Ground, and the Analog output. YF-S201 consumes very little current and can work with an allowing pressure of ≤1.75MPa.

 

Features of YF - S201

• Operating Voltage: 4.5V to 18V DC
• Output type: 5V TTL
• Maximum current draw: 15mA at 5V
• The sensor used: Hall Effect
• Working Flow rate: 1 to 30 Liters/Minute
• Accuracy: ±10%
• Pulses per Liter: 450
• Output duty cycle: 50% +-10%
• Maximum water pressure: 2.0 MPa
• Flow rate pulse characteristics: Frequency (Hz) = 7.5 * Flow rate (L/min)

 

Pin configuration of YF-S201

YF - S201 has 3 Pins for power and the output. The table below explains the color, pin type, and function of the pin.

Colour	Pin type	Function
Red	Power	To provide power to the module
Black	Ground	Connected to the ground terminal
Yellow	Signal	Analog output from the sensor

 

Material Description

The material description below mentions the material used in making specific parts of the water flow measurement sensor.

Serial No.	Part	Material Used
1	Bonnet	Polyamide(Nylon)
2	Screw	Zinc Plated
3	Valve Body	Polyamide
4	Press Valve	-
5	Magnet	-
6	Hall Sensor	-
7	Impeller	POM (Polyoxymethylene)
8	Steel Shaft	SUS 304
9	Wire	PVC (Poly Vinyl Chloride)

 

Alternatives for YF - S201

REES52 1/2'', SEN0216 DFROBOT, XKC Y25

 

Equivalent to YF - S201

FS 200A YF G21, YF G1

 

Note: Complete information can be found in the YF - S201 Datasheet linked at the bottom of this page.

 

How to use YF - S201

The YF-S201 connections are pretty simple, the module contains 3 pins which are generally colour coded as red, black, and yellow.

The Red is the power pin that is connected to the 5V of the microcontroller, the black is the ground pin and the yellow is the signal output pin that can be connected to the digital pin of the microcontroller.

 

Flow and Frequency output of the YF-S201

Flow(L/H)	Frequency(Hz)
120	16
240	32.5
360	49.3
480	65.5
600	82
720	90.2

The YF - S201 sensor has an error of ±10 or 5%. From the table, a linear exponential graph can be derived as the flow value increase along with which the frequency is also observed to increase.

 

Applications of YF - S201

• Agriculture
• Food processing
• Coffee/Tea makers
• Water Management
• Mining Industry

 

2D model of YF-S201

The 2D model of the YF-S201 module is provided to refer and custom design owns footprints of the module.

Note: The dimensions in the image above are in mm