1/4 Inch Water Flow Sensor YF-S402

Product Overview

The YF-S402 is a precision water flow sensor designed for accurate fluid measurement in compact applications. This 1/4 inch flow meter is ideal for projects requiring reliable water flow detection and monitoring.

Key Specifications

Feature	Details
Sensor Type	Hall Effect Flow Sensor
Pipe Diameter	1/4 Inch (6mm)
Flow Range	0.3 - 6 L/min
Operating Pressure	0 - 0.8 MPa
Operating Temperature	0 - 80 degreesC
Output Signal	Digital Pulse
Accuracy	+/-3-5%
Material	Plastic Body with Stainless Steel Rotor
Connection Type	G1/4 Thread
Origin	Original/Authentic
Warranty	7-day warranty on manufacturing defects
Support	24/7 Email & WhatsApp

Why Choose YF-S402?

Highly Accurate - Precise flow measurement for critical applications

Compact Design - Fits easily into tight spaces

Durable Construction - Stainless steel components for longevity

Easy Integration - Simple digital pulse output for microcontroller projects

Cost-Effective - Affordable precision sensor solution

100% Authentic - Sourced from trusted authorized distributors

Fast Delivery - 1-5 day shipping, 7-8 day delivery from Bengaluru warehouse

Expert Support - Full technical assistance included

Applications

DIY & Hobbyist Projects

• Arduino/Raspberry Pi water monitoring systems
• Smart irrigation controllers
• Aquarium flow monitoring

Industrial & Commercial

• Water dispensing systems
• HVAC cooling loops
• Chemical dosing systems
• Fuel flow measurement

Educational

• IoT and embedded systems learning
• Sensor integration projects
• Environmental monitoring experiments

Technical Features

• Hall Effect Technology - Non-contact, reliable pulse generation
• Low Power Consumption - Ideal for battery-powered applications
• Wide Flow Range - Suitable for various flow rates (0.3-6 L/min)
• Temperature Stable - Consistent performance across operating range
• Easy Calibration - Linear output for straightforward calculations

What's Included

In the Box:

• 1x YF-S402 Water Flow Sensor
• Connection cables/connectors
• Technical documentation & datasheet
• Installation guide
• Support materials

How It Works

The YF-S402 uses a Hall Effect sensor to detect the rotation of an internal rotor as water flows through it. Each complete rotation generates a digital pulse, allowing you to calculate flow rate by counting pulses over time.

Formula: Flow Rate (L/min) = Pulse Frequency (Hz) / Calibration Factor (typically 5.5 Hz per L/min)

Installation Guide

1. Prepare Connection - Ensure 1/4" thread compatibility
2. Install Sensor - Use thread sealant tape for leak-proof connection
3. Connect Output - Attach signal wires to microcontroller input pin
4. Power Supply - Typical 5V operation (check datasheet)
5. Calibration - Configure pulse-to-flow-rate conversion in your code

Frequently Asked Questions

Is this sensor 100% authentic?

Yes, absolutely. We source directly from authorized distributors with full authentication verification. Each unit comes with original packaging and documentation.

What's the warranty coverage?

7-day warranty on manufacturing defects covering all manufacturing defects. We also offer a 7-day replacement guarantee for defective units.

How quickly will it ship?

1-5 business days to most locations in India from our Bengaluru warehouse. Express shipping available on request.

Can I use this with Arduino/Raspberry Pi?

Yes! The digital pulse output is compatible with any microcontroller. We provide code examples and integration guides with your purchase.

What's the maximum flow rate it can measure?

The YF-S402 is rated for 0.3 - 6 L/min. For higher flow rates, consider the YF-S201 or YF-S303 variants.

Do you offer technical support?

Yes, complete 24/7 technical support via email and WhatsApp. Our engineers can help with installation, calibration, and integration.

What's your return policy?

7-day returns on manufacturing defects only with full refund or replacement. Unopened items accepted within 30 days.

Are bulk/wholesale discounts available?

Yes! Orders of 10+ units qualify for special wholesale pricing. Contact us for a custom quote.

Is calibration required?

No calibration needed out of the box. The sensor comes pre-calibrated. Use the standard conversion factor (5.5 Hz per L/min) in your calculations.

Customer Support

Email: support@theengineerstore.in

WhatsApp: Available 24/7

Technical Help: Free consultation included

Buy 1/4 Inch Water Flow Sensor YF - S402 Online in India

Purchase the 1/4 Inch Water Flow Sensor YF - S402 online at The Engineer Store - India's most trusted electronics components store. We deliver across all major cities including Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on 1/4 Inch Water Flow Sensor YF - S402 with fast 1-5 day shipping from our Bengaluru warehouse. All products are 100% authentic, sourced from authorized distributors with 7-day warranty on manufacturing defects.

Looking to buy 1/4 Inch Water Flow Sensor YF - S402 at the best price in India? The Engineer Store offers competitive pricing, bulk discounts for orders of 10+ units, and dedicated technical support via email and WhatsApp. Whether you are a hobbyist, student, or professional engineer, we have everything you need for your electronics projects.