--- product_id: 518443070 title: "G1-1/2\" 1.5\" Water Flow Sensor Food-grade Switch Hall Effect Flowmeter Fluid Meter Counter 5-150L/min" brand: "gredia" price: "€ 0.12" currency: EUR in_stock: false reviews_count: 5 url: https://www.desertcart.it/products/518443070-g1-1-2-1-5-water-flow-sensor-food-grade store_origin: IT region: Italy --- # Food-grade, leak-proof seal DC 5-24V wide voltage 5-150L/min flow range G1-1/2" 1.5" Water Flow Sensor Food-grade Switch Hall Effect Flowmeter Fluid Meter Counter 5-150L/min **Brand:** gredia **Price:** € 0.12 **Availability:** ❌ Out of Stock ## Summary > 💧 Flow smarter, not harder — precision meets performance! ## 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?** € 0.12 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/518443070-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 - • **Precision Flow Control:** Accurate ±2% measurement for reliable fluid management - • **Versatile Applications:** Ideal for petrochemical, irrigation, residential waterworks, and more - • **Robust & Safe Materials:** Crafted from food-grade plastic, fully ROHS compliant for peace of mind - • **Universal Compatibility:** G1-1/2" male thread fits seamlessly into your existing setup - • **Energy Efficient Operation:** Low 15mA current consumption keeps your system lean and green ## Overview The G1-1/2" Water Flow Sensor is a compact, food-grade hall effect flowmeter designed for precise fluid measurement between 5-150L/min. Operating at DC 5-24V with a ±2% accuracy, it features a leak-proof seal and durable materials compliant with ROHS standards. Perfect for diverse applications including petrochemical, irrigation, and residential water systems, it ensures efficient, reliable flow monitoring with minimal power consumption. ## 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: 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. ## Features - Connect to G1-1/2 inch 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 | |---------------|-------| | ASIN | B07MY5ZN3Z | | Batteries Required? | No | | Batteries included? | No | | Best Sellers Rank | 32,250 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 16 in Flow Sensors | | Customer Reviews | 4.3 4.3 out of 5 stars (185) | | Date First Available | 6 May 2021 | | Item Package Quantity | 1 | | Item Weight | 150 g | | Item model number | GR-105 | | Manufacturer | GREDIA | | Package Dimensions | 13.6 x 11.8 x 6.9 cm; 150 g | | Part number | GR-105 | | Size | G1-1/2" male thread | | Style | G1-1/2" male thread | ## 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) ![G1-1/2" 1.5" Water Flow Sensor Food-grade Switch Hall Effect Flowmeter Fluid Meter Counter 5-150L/min - Image 2](https://m.media-amazon.com/images/I/61QOP5HKs5L.jpg) ![G1-1/2" 1.5" Water Flow Sensor Food-grade Switch Hall Effect Flowmeter Fluid Meter Counter 5-150L/min - Image 3](https://m.media-amazon.com/images/I/61OiR-fEv6L.jpg) ![G1-1/2" 1.5" Water Flow Sensor Food-grade Switch Hall Effect Flowmeter Fluid Meter Counter 5-150L/min - Image 4](https://m.media-amazon.com/images/I/61aDBuG6axL.jpg) ![G1-1/2" 1.5" Water Flow Sensor Food-grade Switch Hall Effect Flowmeter Fluid Meter Counter 5-150L/min - Image 5](https://m.media-amazon.com/images/I/61qNIsw+nIL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *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. ### ⭐⭐⭐⭐⭐ Review *by -***) on 5 March 2025* Working good for 2 months. ### ⭐⭐⭐⭐⭐ Review *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 G1-1/2" 1.5" Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter 5-150L/min - 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.it/products/518443070-g1-1-2-1-5-water-flow-sensor-food-grade](https://www.desertcart.it/products/518443070-g1-1-2-1-5-water-flow-sensor-food-grade) --- *Product available on Desertcart Italy* *Store origin: IT* *Last updated: 2026-05-13*