---
product_id: 652069170
title: "3/8\" Quick Connect Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter 0.3-10L/min"
brand: "gredia"
price: "€ 55.86"
currency: EUR
in_stock: false
reviews_count: 2
category: "Gredia"
url: https://www.desertcart.de/products/652069170-3-8-quick-connect-water-flow-sensor-food-grade-switch
store_origin: DE
region: Germany
---

# Wide 5-24V DC voltage range Precise 0.3-10L/min flow range Leak-proof quick connect seal 3/8" Quick Connect Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter 0.3-10L/min

**Brand:** gredia
**Price:** € 55.86
**Availability:** ❌ Out of Stock

## Summary

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

## Quick Answers

- **What is this?** 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?** € 55.86 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.de](https://www.desertcart.de/products/652069170-3-8-quick-connect-water-flow-sensor-food-grade-switch)

## 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

- • **Precision Flow Control:** Hall effect sensor delivers ±2% accuracy for reliable fluid measurement.
- • **Effortless Installation:** Lightweight design with quick connect and sealing ring ensures no leaks and fast setup.
- • **Robust & Safe Materials:** Crafted from food-grade plastic, fully ROHS compliant for health-conscious setups.
- • **Universal Compatibility:** Fits standard G3/8" tubing, perfect for coffee machines, water purifiers, and more.
- • **Energy Efficient Operation:** Consumes just 15mA at 5V, ideal for smart devices and low-power systems.

## Overview

The 3/8" Quick Connect Water Flow Sensor by GREDIA is a compact, food-grade flowmeter designed for precise liquid measurement between 0.3 to 10 liters per minute. Featuring a hall effect sensor with ±2% accuracy, it supports a wide DC voltage range (5-24V) and ensures leak-proof connections via its quick connect design. Ideal for professional-grade water heaters, coffee machines, and smart beverage systems, it combines durability, safety, and energy efficiency in a sleek, easy-to-install package.

## 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: Good
Review: leaked at low pressure with soft tubing

## 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 |
|---------------|-------|
| Manufacturer | GREDIA |
| Part number | GR-301 |
| Item Weight | 30 g |
| Package Dimensions | 11 x 7.7 x 3.7 cm; 30 g |
| Item model number | GR-301 |
| Size | G3/8" qiuck connect |
| Style | G3/8" qiuck connect |
| Material | Plastic |
| Batteries Included? | No |
| Batteries Required? | No |

## Images

![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/61B7mr+IAhL.jpg)
![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/51MNBcHhOuL.jpg)
![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/51P8GGohWgL.jpg)
![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/51inYsvEzhL.jpg)
![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/71xKXa9DjML.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

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



### ⭐ leaked at low pressure with soft tubing
*by S***L on 16 April 2022*



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*Product available on Desertcart Germany*
*Store origin: DE*
*Last updated: 2026-03-02*