---
product_id: 109954454
title: "GREDIA 2\" Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter 10-200L/min"
brand: "gredia"
price: "8955 som"
currency: KGS
in_stock: true
reviews_count: 11
category: "Gredia"
url: https://www.desertcart.kg/products/109954454-gredia-2-water-flow-sensor-food-grade-switch-hall-effect
store_origin: KG
region: Kyrgyzstan
---

# DC 5-24V working voltage 10-200L/min flow range 2" BSPT male thread connection GREDIA 2" Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter 10-200L/min

**Brand:** gredia
**Price:** 8955 som
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** GREDIA 2" Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter 10-200L/min by gredia
- **How much does it cost?** 8955 som with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kg](https://www.desertcart.kg/products/109954454-gredia-2-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 for reliable fluid monitoring
- • **Leak-Proof Installation:** Firm sealing ring guarantees zero water leakage under pressure ≤1.75Mpa
- • **Plug & Play Integration:** Compact, lightweight design with easy wiring for quick deployment
- • **Robust Food-Grade Build:** Durable, ROHS-compliant plastic ensures safety and longevity
- • **Wide Voltage Compatibility:** Operates seamlessly from 5V to 24V DC for versatile setups

## Overview

The GREDIA 2" Water Flow Sensor is a high-precision hall effect flowmeter designed for fluid measurement between 10 to 200 liters per minute. Featuring a food-grade, ROHS-compliant plastic body and a secure 2" BSPT male thread connection, it supports a wide DC voltage range (5-24V) and withstands water pressure up to 1.75Mpa. Its compact, leak-proof design ensures reliable performance across industrial, residential, and agricultural applications.

## 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=(0.2*Q)±2%, Q=L/Min, error: ±2% Working range: 10-200L/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 2 inch flowmeter

Review: Works great on my laser cutter - Great replacement for the flow sensor on my Red China laser.
Review: Easy to set up and use - Works well was easy to setup. Using with an arduino uno that has an lcd display to measure total volume and rate of a variable rate spraying system. Read the description. Make sure that the sensor will work for the volume per minute you need measure.

## Features

- Connect to 2 inch BSPT male thread, hall effect
- Flow range:10-200L/min, Water Pressure: ≤1.75Mpa
- Working voltage: DC 5-24 V, F=(0.2*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 |
|---------------|-------|
| ASIN | B07MY6JHNR |
| Best Sellers Rank | #29,400 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #9 in Flowmeters |
| Date First Available | January 19, 2019 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 7.4 ounces |
| Item model number | GR-216 |
| Manufacturer | GREDIA |
| Package Dimensions | 6.61 x 5.83 x 2.83 inches |

## Images

![GREDIA 2" Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter 10-200L/min - Image 1](https://m.media-amazon.com/images/I/31Gn4dr06NL.jpg)
![GREDIA 2" Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter 10-200L/min - Image 2](https://m.media-amazon.com/images/I/41053+uaNSL.jpg)
![GREDIA 2" Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter 10-200L/min - Image 3](https://m.media-amazon.com/images/I/417sOONvXfL.jpg)
![GREDIA 2" Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter 10-200L/min - Image 4](https://m.media-amazon.com/images/I/41T+N39ojEL.jpg)
![GREDIA 2" Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter 10-200L/min - Image 5](https://m.media-amazon.com/images/I/41mrSQ42OyL.jpg)

## Questions & Answers

**Q: If the output signal is a pulse, what is the pulse rate per liter and duration per pulse?**
A: The current image shows an "F" number of 7, which means 7Hz per liter/min, so 7 pulses per second indicates a flow rate of 1 liter/minute, hence 7 * 60 seconds/minute = 420 pulses per liter (per minute). I have no idea what the duration would be.

**Q: Does it prevent back flow or what happens if water does try to go in wrong direction?**
A: It does not have any backflow prevention.  It is a little water wheel inside a pipe which has magnets in the vanes of the water wheel.  The unit simply counts magnetic pulses as the wheel is moved by the water flow.  It would probably register water flow either way but would only be accurate in the forward flow direction.  Any domestic water system  should have backflow preventers in place to keep drinking water contamination from occuring.

**Q: Are the threads npt, bspt or bspp?   please understand this is basic info should always be provided without having to specifically ask.  thanks.**
A: Hello, thank you for your inquiry. It's BSPT.

**Q: If the flow rate is less than 1L/minute, will it not not show any pulses?   I'm interested in using this to detect leaks and 1L/min is a lot of water.**
A: I don't know about 1L/min, but I have tried pumping liquid through one using a dosing pump and nothing registered. The water wheel will have some resistance, so a very slow flow might not register.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works great on my laser cutter
*by S***T on December 12, 2025*

Great replacement for the flow sensor on my Red China laser.

### ⭐⭐⭐⭐⭐ Easy to set up and use
*by C***S on November 14, 2025*

Works well was easy to setup. Using with an arduino uno that has an lcd display to measure total volume and rate of a variable rate spraying system. Read the description. Make sure that the sensor will work for the volume per minute you need measure.

### ⭐⭐⭐⭐ 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 Kyrgyzstan*
*Store origin: KG*
*Last updated: 2026-01-28*