---
product_id: 118925667
title: "- 3/4\" Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter 1-60L/min"
brand: "gredia"
price: "271 kr"
currency: NOK
in_stock: true
reviews_count: 13
category: "Gredia"
url: https://www.desertcart.no/products/118925667-3-4-water-flow-sensor-food-grade-switch-hall-effect
store_origin: NO
region: Norway
---

# Food-grade, leak-proof design DC 5-24V wide voltage compatibility 1-60L/min flow range - 3/4" Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter 1-60L/min

**Brand:** gredia
**Price:** 271 kr
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** - 3/4" Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter 1-60L/min by gredia
- **How much does it cost?** 271 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.no](https://www.desertcart.no/products/118925667-3-4-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

- • **Precision Flow Control:** Accurate ±2% measurement ensures flawless fluid monitoring
- • **Effortless Installation:** Compact, lightweight design with secure sealing ring prevents leaks and downtime
- • **Robust & Safe Materials:** Crafted from food-grade plastic, fully ROHS compliant for health-conscious use
- • **Universal Compatibility:** Fits standard G3/4 inch male threads for seamless integration
- • **Wide Application Spectrum:** Perfect for coffee machines, water purifiers, beverage dispensers, and more

## Overview

This 3/4" Water Flow Sensor features a hall effect flowmeter capable of measuring 1-60L/min with ±2% accuracy. Designed with food-grade plastic and ROHS-compliant materials, it supports DC 5-24V operation and withstands water pressure up to 1.2Mpa. Ideal for integration in water heaters, coffee machines, and beverage systems, it offers reliable, leak-proof performance with 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=(5.5*Q)±2%, Q=L/Min, error: ±2% Working range: 1-60L/min Working voltage: DC 5-24 V Water Pressure: ≤1.2Mpa Liquid temperature: 0-100℃ Maximum current consumption: 15 mA(DC 5V) Wire length: 15 cm Size: 66mm x 38mm(L*W) Refer to the wiring: Red wire: VCC(+) Black wire: GND(-) Yellow wire: Signal output Package: 1 x G3/4 inch flowmeter

Review: Using with a reef aquarium to control flow thru a UV sterilizer - I've adapted this Gredia GR-201 1/2" flow sensor paired with a Digiten Flow Meter to monitor flow rate thru a UV sterilizer. The sterilizer I have requires a flow at 37 GPH optimum and 60 GPH max to be effective eradicating protozoa. Out of the box the pairing of the meter and sensor was way off reporting 16 GPH while a had a gate valve nearly closed. So to calibrate it, the meter has a K-factor value that has to be adjusted to the sensor you pair it with. The default was a K-factor value of 1.98. I did a Google Bard search for what the sensors K-factor should be... 11.45. I set the meters K-factor to that. It was much closer but not accurate. I adjusted my valve until the meter was reading 1 GPH of flow. I set up a bucket to divert the water exiting the system into so I could measure the amount dispensed in a minute. I recorded .453 gal. with the K- 11.45. Now a little math, divide the current K- (11.45) by the flow it produced (0.453) while the valve restricted flow with the meter reading 1 GPM. The resulting new K-factor of 25.27 worked precisely. Well, as precise as using a large measuring cup to measure the amount of water dispensed. I re-ran the test, I got 1 gallon at the 1 minute mark, 3 gal at 3 minutes. The one annoying thing about the meter is the backlit display goes dark after 15 seconds. Annoying during the calibration when your hands are busy turning on/off a pump and a timer. But in actual use I'll only be using this to set the gate valve position and the backlighting won't so much be an issue. I hope this helps those trying to get a more accurate reading.
Review: The magic number is 897 pulses per gallon - Works. Definitely seeing the +/- 5% difference in output. A few things I discovered: * The sensor needs at least 8V. I had a 9v power supply left over from some other equipment. However, a raspberry PI can only take 3.3V into its GPIO port. (and no pull-up resistor is needed) So I sent 8V into this sensor, and on the output pin I installed a 10k resistor tied to ground. This dropped the output voltage to around 3.7V. * I wanted to record data in gallons per hour. This is from my most recent calibration where I dumped water into a bucket marked off with quarters of a gallon on the side. total_gal = total_gal + 0.001115 # 897 pulses per gal = 0.001115 gal per pulse. This code runs whenever a change from high to low occurs on the output pin. flow = (count / 897.0)*3600 # pulses/897 is gal per sec. *3600 is gal per hour * the label faces down. There is a lot of play in the spindle inside. making the label face down puts the impeller more directly in line with the water flow * make sure you install it in the right direction. The arrow on the label was correct for me. * I used waterproof automotive plugs, sealed on the ends with caulk, since this thing will be outside measuring the irrigation water usage.

## Features

- Connect to G3/4 inch male thread, hall effect
- Flow range:1-60L/min, Water Pressure: ≤1.2Mpa
- Working voltage: DC 5-24 V, F=(5.5*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 |
|---------------|-------|
| Customer Reviews | 4.2 out of 5 stars 199 Reviews |

## Images

![- 3/4" Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter 1-60L/min - Image 1](https://m.media-amazon.com/images/I/6119f+Cq5cL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Using with a reef aquarium to control flow thru a UV sterilizer
*by B***. on June 26, 2023*

I've adapted this Gredia GR-201 1/2" flow sensor paired with a Digiten Flow Meter to monitor flow rate thru a UV sterilizer. The sterilizer I have requires a flow at 37 GPH optimum and 60 GPH max to be effective eradicating protozoa. Out of the box the pairing of the meter and sensor was way off reporting 16 GPH while a had a gate valve nearly closed. So to calibrate it, the meter has a K-factor value that has to be adjusted to the sensor you pair it with. The default was a K-factor value of 1.98. I did a Google Bard search for what the sensors K-factor should be... 11.45. I set the meters K-factor to that. It was much closer but not accurate. I adjusted my valve until the meter was reading 1 GPH of flow. I set up a bucket to divert the water exiting the system into so I could measure the amount dispensed in a minute. I recorded .453 gal. with the K- 11.45. Now a little math, divide the current K- (11.45) by the flow it produced (0.453) while the valve restricted flow with the meter reading 1 GPM. The resulting new K-factor of 25.27 worked precisely. Well, as precise as using a large measuring cup to measure the amount of water dispensed. I re-ran the test, I got 1 gallon at the 1 minute mark, 3 gal at 3 minutes. The one annoying thing about the meter is the backlit display goes dark after 15 seconds. Annoying during the calibration when your hands are busy turning on/off a pump and a timer. But in actual use I'll only be using this to set the gate valve position and the backlighting won't so much be an issue. I hope this helps those trying to get a more accurate reading.

### ⭐⭐⭐⭐⭐ The magic number is 897 pulses per gallon
*by H***R on August 29, 2024*

Works. Definitely seeing the +/- 5% difference in output. A few things I discovered: * The sensor needs at least 8V. I had a 9v power supply left over from some other equipment. However, a raspberry PI can only take 3.3V into its GPIO port. (and no pull-up resistor is needed) So I sent 8V into this sensor, and on the output pin I installed a 10k resistor tied to ground. This dropped the output voltage to around 3.7V. * I wanted to record data in gallons per hour. This is from my most recent calibration where I dumped water into a bucket marked off with quarters of a gallon on the side. total_gal = total_gal + 0.001115 # 897 pulses per gal = 0.001115 gal per pulse. This code runs whenever a change from high to low occurs on the output pin. flow = (count / 897.0)*3600 # pulses/897 is gal per sec. *3600 is gal per hour * the label faces down. There is a lot of play in the spindle inside. making the label face down puts the impeller more directly in line with the water flow * make sure you install it in the right direction. The arrow on the label was correct for me. * I used waterproof automotive plugs, sealed on the ends with caulk, since this thing will be outside measuring the irrigation water usage.

### ⭐⭐⭐⭐ The 3/4" BSP (british standard pipe) is a pain. 3/4" garden hose will work with more washers.
*by J***N on July 13, 2026*

It seems to work okay, but the british pipe thread is a pain. I wish they were a little more clear on the pipe thread type. I was able to get a garden hose to connect, but had to use 3 rubber washers. We'll see how long it holds. At least in my application it is only under pressure for about 40 minutes per day.

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*Product available on Desertcart Norway*
*Store origin: NO*
*Last updated: 2026-09-16*