---
product_id: 135643087
title: "1/4\" Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter Connect Hosepipe 0.3-6L/min (Pack of 2）"
brand: "gredia"
price: "MOP$205"
currency: MOP
in_stock: true
reviews_count: 12
category: "Gredia"
url: https://macau.desertcart.com/products/135643087-1-4-water-flow-sensor-food-grade-switch-hall-effect
store_origin: MO
region: Macau
---

# 0.3-6L/min flow range DC 5-24V wide voltage compatibility Food-grade, ROHS-certified materials 1/4" Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter Connect Hosepipe 0.3-6L/min (Pack of 2）

**Brand:** gredia
**Price:** MOP$205
**Availability:** ✅ In Stock

## Summary

> 💧 Flow with confidence — precision meets versatility in every drop!

## Quick Answers

- **What is this?** 1/4" Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter Connect Hosepipe 0.3-6L/min (Pack of 2） by gredia
- **How much does it cost?** MOP$205 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [macau.desertcart.com](https://macau.desertcart.com/products/135643087-1-4-water-flow-sensor-food-grade-switch-hall-effect)

## Best For

- gredia enthusiasts

## Why This Product

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

## Key Features

- • **Multi-Industry Ready:** Ideal for coffee machines, water purifiers, beverage dispensers, and smart campus equipment
- • **Robust & Safe Materials:** Crafted from food-grade plastic, meeting strict ROHS standards for health-conscious applications
- • **Universal Compatibility:** Fits hosepipes with 5-7mm inner diameter (G1/4 inch connector) for versatile use
- • **Plug & Play Installation:** Lightweight, compact design with secure sealing ring prevents leaks effortlessly
- • **Precision Flow Monitoring:** ±3% accuracy ensures reliable liquid measurement every time

## Overview

This pack of two 1/4" water flow sensors offers precise liquid flow measurement from 0.3 to 6 liters per minute with ±3% accuracy. Designed with food-grade, ROHS-compliant plastic, it supports a wide voltage range (DC 5-24V) and fits hosepipes with 5-7mm inner diameter. Its compact, leak-proof design makes it perfect for applications in water heaters, coffee machines, purifiers, and smart campus devices, delivering reliable performance and easy installation.

## Description

Our products are fine made with nice materials and good workmanship, strict quality control, guarantee in after service. The flowmeter is light and handy, easy to install. The sealing ring make the connection firm, the sealing performance is good and the problem of water leakage is avoided. More details about the flow meter: F=(98*Q)±3%, Q=L/Min, error: ±3% Working range: 0.3-6L/min Working voltage: DC 5-24 V Water Pressure: ≤0.8Mpa Liquid temperature: 0-100℃ Maximum current consumptiont: 10 mA(DC 5V) Size: 58mm x 34mm x 26mm(L*W*H) Wire length: 15 cm Refer to the wiring: Red wire: VCC(+) Black wire: GND(-) Yellow wire: Signal output Package: 2 x G1/4 inch flowmeter connect hosepipe

Review: Works flawlessly! - I made a project with a RPi5 to monitor my coolant for my laser cutter/etcher. I used this to make sure that I was getting flow from the coolant output of the laser to verify that there was no issues cooling the laser tube. I connect this sensor to a custom cable and 3D printed adapters for my coolant pipes. The system screen flawlessly tells me whether I have flow and how much!
Review: Good - Functions well, but does not come with technical specs.

## Features

- Connect to a hosepipe whose inner diameter is about 5 to 7 mm( G1/4 inch connector), comes with 2 pieces
- Flow range:0.3-6L/min, Water Pressure: ≤0.8Mpa
- Working voltage: DC 5-24 V, F=(98*Q)±3%, Q=L/Min
- Material: food grade plastic, all raw materials conform to the ROHS test standard
- Wide application: It is mainly used in water heater, coffee machine, water purifier, drinking fountain, beverage machine, campus smart card equipment, etc.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07RF57QF8 |
| Best Sellers Rank | #24,602 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #9 in Flowmeters |
| Date First Available | May 2, 2019 |
| Item Weight | 2.08 ounces |
| Item model number | GR-R401P2 |
| Manufacturer | GREDIA |
| Package Dimensions | 3.46 x 3.19 x 1.22 inches |

## Images

![1/4" Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter Connect Hosepipe 0.3-6L/min (Pack of 2） - Image 1](https://m.media-amazon.com/images/I/61Uoj8NQr8L.jpg)
![1/4" Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter Connect Hosepipe 0.3-6L/min (Pack of 2） - Image 2](https://m.media-amazon.com/images/I/51DlW5Z-ryL.jpg)
![1/4" Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter Connect Hosepipe 0.3-6L/min (Pack of 2） - Image 3](https://m.media-amazon.com/images/I/51DpU6KR0tL.jpg)
![1/4" Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter Connect Hosepipe 0.3-6L/min (Pack of 2） - Image 4](https://m.media-amazon.com/images/I/61hUYJB73cL.jpg)
![1/4" Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter Connect Hosepipe 0.3-6L/min (Pack of 2） - Image 5](https://m.media-amazon.com/images/I/51ryV5Q9FdL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works flawlessly!
*by J***S on May 26, 2025*

I made a project with a RPi5 to monitor my coolant for my laser cutter/etcher. I used this to make sure that I was getting flow from the coolant output of the laser to verify that there was no issues cooling the laser tube. I connect this sensor to a custom cable and 3D printed adapters for my coolant pipes. The system screen flawlessly tells me whether I have flow and how much!

### ⭐⭐⭐⭐ Good
*by E***O on October 8, 2025*

Functions well, but does not come with technical specs.

### ⭐⭐⭐⭐⭐ Review
*by P***X on August 20, 2025*

Buena calidad

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*Product available on Desertcart Macau*
*Store origin: MO*
*Last updated: 2026-03-08*