--- product_id: 366326838 title: "1\" Water Flow Sensor Food-grade Switch Hall Effect Flowmeter Fluid Meter Counter 1-60L/min (Pack of 2）" brand: "gredia" price: "€ 0.15" currency: EUR in_stock: false reviews_count: 5 url: https://www.desertcart.at/products/366326838-1-water-flow-sensor-food-grade-switch-hall-effect-flowmeter store_origin: AT region: Austria --- # Food-grade, leak-proof seal DC 5-24V wide voltage 1-60L/min flow range 1" Water Flow Sensor Food-grade Switch Hall Effect Flowmeter Fluid Meter Counter 1-60L/min (Pack of 2） **Brand:** gredia **Price:** € 0.15 **Availability:** ❌ Out of Stock ## Summary > 💡 Flow smarter, not harder — precision meets peace of mind! ## Quick Answers - **What is this?** 1" Water Flow Sensor Food-grade Switch Hall Effect Flowmeter Fluid Meter Counter 1-60L/min (Pack of 2） by gredia - **How much does it cost?** € 0.15 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/products/366326838-1-water-flow-sensor-food-grade-switch-hall-effect-flowmeter) ## 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 management - • **Robust & Safe Materials:** Food-grade plastic meets ROHS standards for health-conscious use - • **Universal Compatibility:** Fits standard 1" male thread for seamless integration - • **Plug & Play Installation:** Lightweight design with secure sealing ring prevents leaks effortlessly - • **Wide Application Spectrum:** Ideal for petrochemical, irrigation, residential & waterworks systems ## Overview This dual-pack 1" Water Flow Sensor features hall effect technology delivering precise flow measurements from 1 to 60L/min with ±2% accuracy. Crafted from food-grade plastic and compliant with ROHS standards, it supports a broad voltage range (DC 5-24V) and withstands water pressure up to 1.2Mpa. Designed for easy installation with leak-proof sealing, it’s perfect for professional-grade applications in irrigation, petrochemical, and residential water 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=(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: 72mm x 46mm x 42mm(L*W*H) Refer to the wiring: Red wire: VCC(+) Black wire: GND(-) Yellow wire: Signal output Package: 2 x 1 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: Working good for 2 months. - Working good for 2 months. ## Features - Connect to 1 inch male thread, hall effect, comes with 2 pieces - 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 petrochemical industry, residential area flow control, waterworks, farmland and garden irrigation, etc. ## Technical Specifications | Specification | Value | |---------------|-------| | Manufacturer | GREDIA | | Part number | GR-108P2 | | Item Weight | 159 g | | Package Dimensions | 15.01 x 11.3 x 5.11 cm; 159 g | | Item model number | GR-108P2 | | Size | G1" male thread 2 | | Style | G1" male thread | | Material | Plastic | | Item Package Quantity | 1 | | Batteries included? | No | | Batteries Required? | No | ## Images ![1" Water Flow Sensor Food-grade Switch Hall Effect Flowmeter Fluid Meter Counter 1-60L/min (Pack of 2） - Image 1](https://m.media-amazon.com/images/I/61TGRdrRC4L.jpg) ![1" Water Flow Sensor Food-grade Switch Hall Effect Flowmeter Fluid Meter Counter 1-60L/min (Pack of 2） - Image 2](https://m.media-amazon.com/images/I/61jre3AoWVL.jpg) ![1" Water Flow Sensor Food-grade Switch Hall Effect Flowmeter Fluid Meter Counter 1-60L/min (Pack of 2） - Image 3](https://m.media-amazon.com/images/I/51dKGkxT6hL.jpg) ![1" Water Flow Sensor Food-grade Switch Hall Effect Flowmeter Fluid Meter Counter 1-60L/min (Pack of 2） - Image 4](https://m.media-amazon.com/images/I/61GYyhxGWLL.jpg) ![1" Water Flow Sensor Food-grade Switch Hall Effect Flowmeter Fluid Meter Counter 1-60L/min (Pack of 2） - Image 5](https://m.media-amazon.com/images/I/61dJdCEHHiL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: How many pulses does the unit generate per liter?** A: Hello, The unit produces 450 pulses per liter. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Using with a reef aquarium to control flow thru a UV sterilizer *by B***. on 26 June 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. ### ⭐⭐⭐⭐⭐ Working good for 2 months. *by -***) on 5 March 2025* Working good for 2 months. ### ⭐⭐⭐⭐⭐ Actually works *by G***T on 13 February 2025* Believe it or not I put these on my flexicoil sprayer the 65xl and was able to calibrate my nozzles to the new meter and it was pretty accurate I bought a bag of 20 so I had back up but the original lasted 2 years now pretty durable wasn’t expecting that ## Frequently Bought Together - GREDIA 1" Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter 1-60L/min (Pack of 2） - Ximimark 2Pcs 1/2" Thread Plastic Electric Solenoid Valve Water Inlet Flow Switch Magnetic Water Air Normally Closed Tools DC 12V N/C 0.02 to 0.8mpa - GREDIA 3/4" DC 12V Solenoid Valve N/C Normally Closed Water Inlet Flow Switch --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.at/products/366326838-1-water-flow-sensor-food-grade-switch-hall-effect-flowmeter](https://www.desertcart.at/products/366326838-1-water-flow-sensor-food-grade-switch-hall-effect-flowmeter) --- *Product available on Desertcart Austria* *Store origin: AT* *Last updated: 2026-07-26*