Skip to main content
Free Delivery  ·  COD Available  ·  15-Day Returns
Elecvora
Water Flow Sensor YFS401 Flowmeter 0.3–6L/min 3.5mm White — image 1
Hover to zoom

1 / 5 · Click to enlarge

Water Flow Sensor YFS401 Flowmeter 0.3–6L/min 3.5mm White

35+ bought in past month
AI Summary
Flow Sensors for everyday users

The Water Flow Sensor YFS401 Flowmeter 0.3–6L/min 3.5mm White is a value-for-money flow sensors designed for everyday users. It features Max Water Flow(L/min): 0.3 to 6 and Operating Voltage (VDC): 3.5 to 24.

₹715
Free Shipping💵 COD Available

Available Offers

Free Delivery on this order. No minimum order value.

15-Day Easy Returns — hassle-free return & full refund.

Secure Payment — 100% safe checkout with UPI, Cards & Net Banking.

Total: ₹715
Buying tip: A smart budget buy — solid performance without breaking the bank.
Estimated delivery: 24 Aug7 Sept
Free Shipping
Pan India delivery
15-Day Returns
Hassle-free policy
Secure Payment
Razorpay protected
Quality Assured
Vetted products only

Available Offers

💳

5% Cashback

Pay with UPI & get 5% cashback (up to ₹50) via Razorpay

🏦

No-Cost EMI

Available on select bank cards at checkout. 0% interest for 3 months.

📦

Free Shipping

Free delivery on all orders. No minimum order value.

💵

Cash on Delivery

COD available on orders up to ₹5,000 across India.

Quick Specs

Max Water Flow(L/min): 0.3 to 6
Operating Voltage (VDC): 3.5 to 24
Operating Current (A): 0.015
Insulation Resistance (MOhm): >100
Length (mm): 58
Width (mm): 35

Ideal For

Electronics projectsArduino / Raspberry Pi buildsPrototyping
Share:
SKU: robu-890245Category: Flow Sensors

About This Product

The Water Flow Sensor YFS401 Flowmeter 0.3–6L/min 3.5mm White is a value-for-money flow sensors designed for everyday users. It delivers reliable performance at an accessible price.

Key Specifications

  • Max Water Flow(L/min): 0.3 to 6
  • Operating Voltage (VDC): 3.5 to 24 — works with standard household power
  • Operating Current (A): 0.015
  • Insulation Resistance (MOhm): >100
  • Length (mm): 58
  • Width (mm): 35
  • Weight (g): 30
  • Shipping Weight: 0.033 kg

Why Buy from Elecvora?

Elecvora sources this product directly, cutting out multiple middlemen. Every order includes free shipping, a 15-day return policy, and secure payment via Razorpay.

The water flow sensor measures the rate of a liquid flowing through it. The YF-S401 water flow sensor consists of a plastic valve body, flow rotor, and hall effect sensor. It is usually used at the inlet end to detect the amount of flow.

When liquid flows through the sensor, a magnetic rotor will rotate and the rate of rotation will vary with the rate of flow. The hall effect sensor will then output a pulse width signal. Connect it to a microcontroller and you can monitor multiple devices such as your coffee maker, sprinkler or anything else, and control the water flow rate to suit your needs! 


Features:

  1. Analog Sensor
  2. Accuracy Up-to 5%
  3. Water Proof Sensor
  4. Standard 1/8" Nozzle Size
  5. Max. Supported Water Flow: 6L/Min

Package Includes:

1 x Water Flow Sensor YFS401 Flowmeter 0.3-6L/min3.5mm White

Setup Guide

1
Identify the pins
Locate VCC (power), GND (ground), and data pins (SDA/SCL for I2C, MOSI/MISO for SPI, or TX/RX for UART). Refer to the pinout diagram on the product page.
2
Wire to your microcontroller
Connect VCC to 3.3V or 5V (check the module spec), GND to GND, and data pins to the appropriate GPIO pins on your Arduino or Raspberry Pi.
3
Install libraries
In Arduino IDE, go to Sketch → Include Library → Manage Libraries and search for the sensor library. Install the recommended version.
4
Upload example sketch
Open File → Examples → [library name] → Basic Example. Upload to your board and open Serial Monitor to view output.
5
Calibrate if needed
Some sensors (temperature, humidity, distance) may need a short warm-up period or calibration. Run the calibration sketch if provided.