--- product_id: 452665581 title: "G1-1/2\" 1.5\" Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter 5-150L/min" brand: "gredia" price: "€ 142.34" currency: EUR in_stock: true reviews_count: 6 category: "Gredia" url: https://www.desertcart.pt/products/452665581-g1-1-2-1-5-water-flow-sensor-food-grade store_origin: PT region: Portugal --- # Food-grade plastic, ROHS certified DC 5-24V wide voltage compatibility 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:** € 142.34 **Availability:** ✅ In Stock ## Summary > 💧 Flow Smart, Flow Safe — The Ultimate Water Sensor for Pros Who Demand Precision ## 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?** € 142.34 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/452665581-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 - • **Versatile Application:** Perfect for petrochemical, irrigation, waterworks, and smart home flow control—future-proof your system. - • **Precision Flow Control:** Accurate ±2% measurement ensures reliable fluid monitoring for your critical projects. - • **Leak-Proof Installation:** Includes a high-quality sealing ring for firm connections and zero water leakage—install with confidence. - • **Universal Voltage Range:** Operates seamlessly from 5V to 24V DC, fitting diverse industrial and residential setups. - • **Durable Food-Grade Build:** Crafted from ROHS-compliant, food-safe plastic for safe, long-lasting use in water and fluid systems. ## Overview The G1-1/2" 1.5" Water Flow Sensor is a hall effect flowmeter designed for precise fluid measurement between 5 to 150 liters per minute. Featuring a durable, food-grade plastic body compliant with ROHS standards, it supports a wide DC voltage range (5-24V) and withstands water pressure up to 1.75MPa. Its compact design includes a leak-proof sealing ring for easy installation and reliable performance across industrial, agricultural, and residential water flow 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=(0.5*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: Working good for 2 months. - Working good for 2 months. 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. ## 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 | |---------------|-------| | ASIN | B07MY5ZN3Z | | Are batteries included? | No | | Best Sellers Rank | #158,086 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #332 in Flowmeters | | Brand | GREDIA | | Country of Origin | USA | | Customer Reviews | 4.2 4.2 out of 5 stars (181) | | Date First Available | 20 October 2021 | | Item Weight | 150 g | | Item model number | GR-105 | | Manufacturer | GREDIA | | Model number | GR-105 | | Number of Memory Sticks | 1 | | Package Dimensions | 13.6 x 11.8 x 6.9 cm; 150 g | ## 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) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Working good for 2 months. *by -***) on 5 March 2025* Working good for 2 months. ### ⭐⭐⭐⭐⭐ 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. ### ⭐⭐⭐⭐⭐ 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 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.pt/products/452665581-g1-1-2-1-5-water-flow-sensor-food-grade](https://www.desertcart.pt/products/452665581-g1-1-2-1-5-water-flow-sensor-food-grade) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-06-24*