---
product_id: 124454311
title: "G1/4\" Quick Connect Hall Effect Sensor Water Flow Sensor Flowmeter Water Flow Counter Meter 0.3-10L/min - Arduino, Raspberry Pi, and Reverse Osmosis Filter Compatible"
brand: "digiten"
price: "5.46 OMR"
currency: OMR
in_stock: true
reviews_count: 13
category: "Digiten"
url: https://www.desertcart.com.om/products/124454311-g1-4-quick-connect-hall-effect-sensor-water-flow-sensor
store_origin: OM
region: Oman
---

# Wide 5-18V voltage range Flow rate 0.3-10L/min G1/4" Quick-Connect fitting G1/4" Quick Connect Hall Effect Sensor Water Flow Sensor Flowmeter Water Flow Counter Meter 0.3-10L/min - Arduino, Raspberry Pi, and Reverse Osmosis Filter Compatible

**Brand:** digiten
**Price:** 5.46 OMR
**Availability:** ✅ In Stock

## Summary

> 💧 Flow smarter, not harder — precision meets convenience.

## Quick Answers

- **What is this?** G1/4" Quick Connect Hall Effect Sensor Water Flow Sensor Flowmeter Water Flow Counter Meter 0.3-10L/min - Arduino, Raspberry Pi, and Reverse Osmosis Filter Compatible by digiten
- **How much does it cost?** 5.46 OMR with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.om](https://www.desertcart.com.om/products/124454311-g1-4-quick-connect-hall-effect-sensor-water-flow-sensor)

## Best For

- digiten enthusiasts

## Why This Product

- Trusted digiten brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Safe for Consumption:** Food-grade materials ensure every drop passing through is safe to drink—trust your water quality.
- • **Effortless Plug & Play:** G1/4" quick-connect design for seamless installation and removal—perfect for busy pros.
- • **Built to Brave Elements:** Waterproof, heat, pressure, and cold resistant—engineered for demanding environments.
- • **Precision Flow Tracking:** Hall effect sensor delivers ±2% accuracy across 0.3-10L/min flow range—never miss a drop.
- • **Versatile Compatibility:** Works flawlessly with Arduino, Raspberry Pi, and most RO filtration systems—future-proof your projects.

## Overview

The DIGITEN G1/4" Quick Connect Hall Effect Water Flow Sensor offers precise liquid flow measurement from 0.3 to 10L/min with ±2% accuracy. Featuring a durable, waterproof design and a user-friendly quick-connect fitting, it integrates effortlessly with Arduino, Raspberry Pi, and reverse osmosis systems. Its food-grade construction guarantees safe drinking water monitoring, making it ideal for smart home, industrial, and DIY applications.

## Description

Specifications: Frequency: F=38 * Q (L / Min), error: ±2%. F=constant * units of flow (L / min) * time (seconds). Flow range:0.3-10L/min Maximum Consumption current:10mA(DC 5V) Working voltage range: DC 5-18 V Operating Temp:0-80°C, Operating humidity:35%-90%RH Pressure range: 0-0.8MPa Storage Temperature:-25-80°C Storage humidity: 25%-95%RH Output Waveform: Square Wave,output pulse singal. ROHS Compliant. Cable length:15cm. Wiring: Red---VCC(+); Black---GND; Yellow----SignalPackage Include: Flow Sensor x1

Review: Mating connector is a JST-XH-2.54, 3-PIN - I revised this post after shopping for the right mating connector, since they don't specify. The mating connector is a 3-pin JST-XH-2.54. It's a 2.54mm JST connector available on desertcart. Hope this helps somebody else so they don't have to guess and buy a few different things to get the right one!! There are a few different JST sizes. Other than that, it's a nice sensor and working like a champ! UPDATE: I finally got my test environment on a live water supply. The accuracy is horrible based on initial testing. I'm trying to measure absolute water volume....I don't care about flow rate. Based on initial testing into a marked bucket, I got close to 4,000 pulses/gallon. But if the supply pressure is reduced to 10PSI, I'm resulting in HALF the pulse count!! It's all over the place. So I'm not sure about this thing. I'd be interested if anybody else has had any luck in a totalizer application? It would be nice to know a simple constant for pulses per standard volume...like pulses/gallon.
Review: Excellent for Hobbyist Projects - I purchased the 1/4" quick connect version of this sensor to be part of some custom AVR hardware I developed for the monitoring of water line filter life and efficiency. My sensor has been working great for almost a year now with no leaks and consistent operation. I did need to manually calibrate the k-value to make its readings more accurate. The product description suggests a value of 38 which I found to be under-estimating the actual water volume. Using a 2-cup measuring cup I took 10 samples and recorded the reported vs actual volume and found a value of 36 was way more accurate for my sensor. I believe the reported +/-2% error is more like +/-5 or 6%. If accuracy is important, I would suggest performing your own calibration. Otherwise, the sensors work great for my application.

## Features

- ★Food grade: Liquid passed through is safe to drink.
- ★G1/4 inch Quick-Connect: Easy installation and removal, suitable for 1/4" tube and works with most Reverse Osmosis filtration systems.
- ★Flow range:0.3-10L/min, working voltage range: DC 5-18V.
- ★Waterproof, heat resistance, pressure resistance, cold resistance.
- ★Sensor: Hall effect. Application:water heater thermostat, water purifier, boiler, water dispensers, coffee machines, smart card equipment, the boiler and so on.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07QRXLRTH |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #87,811 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #107 in Flowmeters |
| Customer Reviews | 4.1 4.1 out of 5 stars (35) |
| Date First Available | April 16, 2019 |
| Item Weight | 0.704 ounces |
| Item model number | FL-S402BZJ |
| Manufacturer | DIGITEN |
| Package Dimensions | 3.2 x 2.4 x 0.2 inches |
| Part Number | FL-S402BZJ |
| Size | G1/4" Quick Connect |

## Images

![G1/4" Quick Connect Hall Effect Sensor Water Flow Sensor Flowmeter Water Flow Counter Meter 0.3-10L/min - Arduino, Raspberry Pi, and Reverse Osmosis Filter Compatible - Image 1](https://m.media-amazon.com/images/I/51O0vAIktHL.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Mating connector is a JST-XH-2.54, 3-PIN
*by N***R on December 16, 2024*

I revised this post after shopping for the right mating connector, since they don't specify. The mating connector is a 3-pin JST-XH-2.54. It's a 2.54mm JST connector available on Amazon. Hope this helps somebody else so they don't have to guess and buy a few different things to get the right one!! There are a few different JST sizes. Other than that, it's a nice sensor and working like a champ! UPDATE: I finally got my test environment on a live water supply. The accuracy is horrible based on initial testing. I'm trying to measure absolute water volume....I don't care about flow rate. Based on initial testing into a marked bucket, I got close to 4,000 pulses/gallon. But if the supply pressure is reduced to 10PSI, I'm resulting in HALF the pulse count!! It's all over the place. So I'm not sure about this thing. I'd be interested if anybody else has had any luck in a totalizer application? It would be nice to know a simple constant for pulses per standard volume...like pulses/gallon.

### ⭐⭐⭐⭐⭐ Excellent for Hobbyist Projects
*by M***H on February 19, 2023*

I purchased the 1/4" quick connect version of this sensor to be part of some custom AVR hardware I developed for the monitoring of water line filter life and efficiency. My sensor has been working great for almost a year now with no leaks and consistent operation. I did need to manually calibrate the k-value to make its readings more accurate. The product description suggests a value of 38 which I found to be under-estimating the actual water volume. Using a 2-cup measuring cup I took 10 samples and recorded the reported vs actual volume and found a value of 36 was way more accurate for my sensor. I believe the reported +/-2% error is more like +/-5 or 6%. If accuracy is important, I would suggest performing your own calibration. Otherwise, the sensors work great for my application.

### ⭐⭐⭐⭐ Good for RO supply or product water usage monitoring. Switch signal & negative leads in connector
*by M***B on April 17, 2023*

I've spent the past few months refining my assembly of a whole house well water filtration system & reverse osmosis drinking water plus ice makers on 2 refrigerators, a sink side spigot & rain barrel top off water feed for our 600 gallon pond. With this sensor & the Digiten controller I can measure the feed water side of the RO/DI pretty accurately. Using the DIGITEN 1/4" Quick Connect Hall Effect Sensor Water Flow Sensor Food-Grade Flowmeter Water Flow Counter Meter 0.3-10L/min to make it easier to determine membrane & pre/post filtration stages effective remaining life. Chose this over a kit as I've no need for solenoid control of the input water, bought the controller & sensor separately to save a few bucks. The press fit sensor was nearly effortless to install, with one caveat, the sensor is miswired when ordered separately from the controller. It's an easy enough fix as the jacks are accessable in the plug assembly & can be pressed out to swap positions to work with the controller's harness connector. In this case as noted by other reviewers the black & yellow leads need to swap positions to connect to the proper pins in the not quite correct mating connector. They can fit together but it's not the normal connector as appears to be supplied in the controller kit using the same sensor. As far as hose installation, simply cut your ¼" hose end square & cleanly, push til it bottoms out in the fitting, tug back a smidge & snap on the horseshoe lock into the notch between the cuff & fitting body, you're all set. Set up of the controller was fairly straight forward, set up for total usage, alarm function on a count, & visual flow indicator. You will need to calibrate the sensor with your controller, the instructions are included with it. With the sensors installed it seems sensitive enough once the controller is properly calibrated to the right K value for your pressure & flow. Calibration is pretty straight forward, set a K, decant some water, adjust until the meter display agrees with the decanted volume of water...in my case a K value of 150 was close enough. Of course it would be great if Digiten had a flow sensor granular enough to track product water production (not usage, production) So now I can track when to swap out filters at 850 gallons & the membrane at 44000, as long as it stays in calibration & the flow meter doesn't fail. My opinion so far, is it's a good buy, just remember to swap the leads positions in the connector! I'll update in the future if anything changes. Digiten, if you read this, please produce a dual monitoring model of the controller, would love to track supply & product production in a single display...and while on a wishlist, wifi reporting would be huge.

## Frequently Bought Together

- DIGITEN G1/4" Quick Connect Hall Effect Sensor Water Flow Sensor Food-Grade Flowmeter Water Flow Counter Meter 0.3-10L/min - Arduino, Raspberry Pi, and Reverse Osmosis Filter Compatible
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*Product available on Desertcart Oman*
*Store origin: OM*
*Last updated: 2026-05-01*