---
product_id: 118205517
title: "GREDIA 3/8\" Quick Connect Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter 0.3-10L/min"
brand: "gredia"
price: "€ 20.41"
currency: EUR
in_stock: true
reviews_count: 12
category: "Gredia"
url: https://www.desertcart.fr/products/118205517-gredia-3-8-quick-connect-water-flow-sensor-food-grade
store_origin: FR
region: France
---

# Wide 5-24V voltage range Precise 0.3-10L/min flow detection Quick connect G3/8" fitting GREDIA 3/8" Quick Connect Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter 0.3-10L/min

**Brand:** gredia
**Price:** € 20.41
**Availability:** ✅ In Stock

## Summary

> 💧 Flow Smart, Connect Fast – Never Miss a Drop!

## Quick Answers

- **What is this?** GREDIA 3/8" Quick Connect Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter 0.3-10L/min by gredia
- **How much does it cost?** € 20.41 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fr](https://www.desertcart.fr/products/118205517-gredia-3-8-quick-connect-water-flow-sensor-food-grade)

## 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

- • **Food-Grade Safety:** Crafted from ROHS-certified, food-grade plastic—perfect for beverage and water applications.
- • **Compact & Lightweight:** Slim 60x36x28mm design with just 1.06 oz weight fits effortlessly into any fluid monitoring project.
- • **Leak-Proof Quick Connect:** Secure G3/8" connection with sealing ring guarantees zero water leakage and easy installation.
- • **Precision Flow Monitoring:** Accurate ±2% measurement ensures flawless fluid control for your smart systems.
- • **Universal Voltage Compatibility:** Operates seamlessly from DC 5 to 24V, fitting diverse industrial and DIY setups.

## Overview

The GREDIA 3/8" Quick Connect Water Flow Sensor is a compact, food-grade hall effect flowmeter designed for precise liquid flow measurement between 0.3 to 10L/min. It supports a broad DC voltage range (5-24V), features a leak-proof quick connect fitting, and delivers ±2% accuracy, making it ideal for water heaters, coffee machines, purifiers, and smart fluid control systems.

## 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=(21*Q)±2%, Q=L/Min, error: ±2% Working range: 0.3-10L/min Working voltage: DC 5-24 V Water Pressure: ≤0.8Mpa Liquid temperature: 0-100℃ Maximum current consumption: 15 mA(DC 5V) Wire length: 15 cm Size: 60mm x 36mm x 28mm(L*W*H) Refer to the wiring: Red wire: VCC(+) Black wire: GND(-) Yellow wire: Signal output Package: 1 x G3/8 inch flowmeter quick connect

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 G3/8 inch tube, hall effect
- Flow range:0.3-10L/min, Water Pressure: ≤0.8Mpa
- Working voltage: DC 5-24 V, F=(21*Q)±2%, 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 | B07MY7H45V |
| Best Sellers Rank | #41,312 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #15 in Flowmeters |
| Date First Available | January 19, 2019 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 1.06 ounces |
| Item model number | GR-301 |
| Manufacturer | GREDIA |
| Package Dimensions | 4.33 x 3.03 x 1.46 inches |

## Images

![GREDIA 3/8" Quick Connect Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter 0.3-10L/min - Image 1](https://m.media-amazon.com/images/I/315cpbA-UwL.jpg)
![GREDIA 3/8" Quick Connect Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter 0.3-10L/min - Image 2](https://m.media-amazon.com/images/I/31AJa1QL6vL.jpg)
![GREDIA 3/8" Quick Connect Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter 0.3-10L/min - Image 3](https://m.media-amazon.com/images/I/31H4B-S9DIL.jpg)
![GREDIA 3/8" Quick Connect Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter 0.3-10L/min - Image 4](https://m.media-amazon.com/images/I/31xxyVAtCkL.jpg)
![GREDIA 3/8" Quick Connect Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter 0.3-10L/min - Image 5](https://m.media-amazon.com/images/I/31yDi--MXEL.jpg)

## Questions & Answers

**Q: What is the K value for this sensor please?**
A: The label on the sensor provides an "F" number that is the Hz for LITERS/minute; my search for a "K" value states that number is GALLONS/minute. A liter is VERY ROUGHLY a little less than a quart, so a K value should be roughly 4 (3.78541) times an F value.

**Q: Is the output PWM or an analog output?**
A: Hello, the output is PWM.

**Q: would i be able to measure the flow through my drip irrigation with this? never measured but I'm guessing it might be less than .3l/min at times**
A: I have three different models of Gredia's flowmeters and I found them to be inaccurate at low flow rates, I presume there is not enough force to spin the wheel ... F = ma.

**Q: What is the output voltage on the yellow wire during .4 lpm flow if fed with 5VDC?**
A: At 5vdc you should get >4.7vdc

## 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

## Frequently Bought Together

- GREDIA 3/8" Quick Connect Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter 0.3-10L/min
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*Product available on Desertcart France*
*Store origin: FR*
*Last updated: 2026-01-26*