---
product_id: 129231076
title: "G1-1/2\" 1.5\" Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter 5-150L/min"
brand: "gredia"
price: "€ 53.99"
currency: EUR
in_stock: true
reviews_count: 13
category: "Gredia"
url: https://www.desertcart.nl/products/129231076-g1-1-2-1-5-water-flow-sensor-food-grade
store_origin: NL
region: Netherlands
---

# DC 5-24V working voltage 5-150 L/min flow range G1-1/2" BSPT male thread G1-1/2" 1.5" Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter 5-150L/min

**Brand:** gredia
**Price:** € 53.99
**Availability:** ✅ In Stock

## Summary

> 💧 Flow with confidence — measure every drop like a pro!

## Quick Answers

- **What is this?** G1-1/2" 1.5" Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter 5-150L/min by gredia
- **How much does it cost?** € 53.99 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/129231076-g1-1-2-1-5-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

- • **Multi-Industry Ready:** Perfect for petrochemical, irrigation, residential, and waterworks use
- • **Food-Grade Durability:** Crafted from ROHS-compliant, food-safe plastic for safe water applications
- • **Precision Flow Control:** ±2% accuracy ensures reliable fluid measurement every time
- • **Leak-Proof Installation:** Firm sealing ring design eliminates water leakage worries
- • **Wide Voltage Compatibility:** Operates seamlessly from 5V up to 24V DC for versatile integration

## Overview

The G1-1/2" 1.5" Water Flow Sensor is a highly accurate hall effect flowmeter designed for fluid measurement between 5 to 150 L/min. Made from food-grade, ROHS-compliant plastic, it supports a wide DC voltage range (5-24V) and withstands water pressure up to 1.75 Mpa. Its leak-proof sealing and easy installation make it ideal for applications in petrochemical, irrigation, residential water control, and more, delivering precise flow data with ±2% error margin.

## 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=(0.5*Q)±2%, Q=L/Min, error: ±2% Working range: 5-150L/min Working voltage: DC 5-24 V Water Pressure: ≤1.75Mpa Liquid temperature: 0-100℃ Maximum current consumption: 15 mA(DC 5V) Wire length: 15 cm Size:92mm x 55mm(L*W) Refer to the wiring: Red wire: VCC(+) Black wire: GND(-) Yellow wire: Signal output Package: 1 x 1.5 inch flowmeter

Review: Worked as expected - This flow control was used on my Pool monitor system with very good results
Review: Works with 3v3 on VCC. - I haven't finished integration, but initial tests are very positive. I am running this meter on 3v and so far it's working great. I think there's a small paddlewheel inside that spins to count flow; I don't have measurements on precision yet, but the numbers I'm seeing show it to be quite sensitive indeed. I've connected it to a SEEED Xiao ESP32C3, and configured it with ESPHome as a pulse counter, and then integrate that pulse counter into a volume measurement. I still have some work to do on the calibration, but very pleased with this so far. I haven't compared it to others, and I think there are some improvements to be had in sturdiness (it's cheap plastic, but that's obvious from the photos), but overall I am excited to have a working meter.

## Features

- Connect to G1-1/2 inch BSPT male thread, hall effect
- Flow range:5-150L/min, Water Pressure: ≤1.75Mpa
- Working voltage: DC 5-24 V, F=(0.5*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 petrochemical industry, residential area flow control, waterworks, farmland and garden irrigation, etc.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Customer Reviews | 4.1 out of 5 stars 203 Reviews |

## Images

![G1-1/2" 1.5" Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter 5-150L/min - Image 1](https://m.media-amazon.com/images/I/61ltO-x8C9L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Worked as expected
*by A***Z on September 1, 2026*

This flow control was used on my Pool monitor system with very good results

### ⭐⭐⭐⭐⭐ Works with 3v3 on VCC.
*by J***. on May 7, 2025*

I haven't finished integration, but initial tests are very positive. I am running this meter on 3v and so far it's working great. I think there's a small paddlewheel inside that spins to count flow; I don't have measurements on precision yet, but the numbers I'm seeing show it to be quite sensitive indeed. I've connected it to a SEEED Xiao ESP32C3, and configured it with ESPHome as a pulse counter, and then integrate that pulse counter into a volume measurement. I still have some work to do on the calibration, but very pleased with this so far. I haven't compared it to others, and I think there are some improvements to be had in sturdiness (it's cheap plastic, but that's obvious from the photos), but overall I am excited to have a working meter.

### ⭐⭐⭐⭐ Not perfect but for the price i have no complaints
*by A***R on December 30, 2023*

title sums it up for me, i added enough Teflon tape, screwed everything together (no leaks) and started coding. for this project i used 2 GREDIA G2 2" Water Flow Sensor/Switch Hall Effect Flowmeter Fluid Meter Counter 10-200L/min (model GR-216). my pump is rated for about 80gpm accounting for 90degree elbows and piping i was suspecting about 60gpm all said and done. After physically measuring my flow rate and modifying my initial code i ended with a flow rate of about 57.75gpm so these get a thumps up from me. here is my initial starting off point with my Rpi3/python code wise, feel free to use it (i monster-iz-ed a couple code snip-its i found online) only thing i don't 100% understand is at the very end of the code i have to multiple gpm by 2 to get close to what i physically measured. only logic i can use is maybe this/these sensors have two pulses per rotation other than that i have no idea, it's avg. rate is at about what i measured (+-1.6%) so it's good enough for what i'm using them for. ## This if for 2 GREDIA G2 2" Water Flow Sensor/Switch Hall Effect Flowmeter Fluid Meter Counter 10-200L/min (model GR-216) ## This code is not 100% accurate but is close enough for measuring coolant flow in a cooling system ## physically measure a flow rate of about 6.44531 gpm; sensor avg. rate is 6.342 gpm a difference of about 1.6% #!/usr/bin/python3 import RPi.GPIO as GPIO import time, sys FLOW_SENSOR = 4 FLOW_SENSOR2 = 17 flowCalibrationFactor = 0.2 # Note: F=(0.2*Q)±2% for this flow sensor, Q=L/Min, and F is pulse freq in 1/s global oldTime global count global count2 oldTime = 0 count = 0 count2 = 0 GPIO.setmode(GPIO.BCM) GPIO.setup(FLOW_SENSOR, GPIO.IN, pull_up_down = GPIO.PUD_DOWN) GPIO.setup(FLOW_SENSOR2, GPIO.IN, pull_up_down = GPIO.PUD_DOWN) def main(): GPIO.add_event_detect(FLOW_SENSOR, GPIO.RISING, callback=countPulse) GPIO.add_event_detect(FLOW_SENSOR2, GPIO.RISING, callback=countPulse2) while True: try: curgpm = getFlow() print("GPM: %s" % curgpm ) time.sleep(1) except KeyboardInterrupt: print('\ncaught keyboard interrupt!, bye') GPIO.cleanup() sys.exit() def countPulse(channel): global count count = count+1 def countPulse2(channel): global count2 count2 = count2+1 def getFlow(): global count global count2 global oldTime start_cnt = count + count2 readcnt = 0 while readcnt < 1000: time.sleep(0.001) readcnt += 1 end_cnt = count + count2 pulses = end_cnt - start_cnt # Note: F=(0.2*Q)±2% for this flow sensor, Q=L/Min, and F is pulse freq in 1/s gpm = ((1000.0 / (round(time.time() * 1000, 5) - oldTime)) * pulses) / flowCalibrationFactor*0.26417287472922 #gph = ((1000.0 / (round(time.time() * 1000, 5) - oldTime)) * pulses) / flowCalibrationFactor*15.8503 pulses = 0 oldTime = round(time.time() * 1000, 5) return round(gpm, 3)*2 if __name__ == "__main__": main()

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*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-09-30*