--- product_id: 135643087 title: "1/4\" Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter Connect Hosepipe 0.3-6L/min (Pack of 2）" brand: "gredia" price: "4395 kr" currency: ISK in_stock: true reviews_count: 2 category: "Gredia" url: https://www.desertcart.is/products/135643087-1-4-water-flow-sensor-food-grade-switch-hall-effect store_origin: IS region: Iceland --- # 0.3-6 L/min flow range DC 5-24 V wide voltage compatibility Food-grade, ROHS-certified plastic 1/4" Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter Connect Hosepipe 0.3-6L/min (Pack of 2） **Brand:** gredia **Price:** 4395 kr **Availability:** ✅ In Stock ## Summary > 💡 Flow smarter, not harder — precision meets versatility in every drop! ## Quick Answers - **What is this?** 1/4" Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter Connect Hosepipe 0.3-6L/min (Pack of 2） by gredia - **How much does it cost?** 4395 kr with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/135643087-1-4-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 - • **Robust & Leak-Proof:** Sealing ring guarantees firm, leak-free connections, safeguarding your equipment and workspace. - • **Dual-Pack Convenience:** Two flow sensors included—perfect for backup or multi-point installations without extra orders. - • **Precision Flow Control:** Accurate ±3% measurement ensures reliable fluid monitoring for your smart devices. - • **Versatile Applications:** Ideal for coffee machines, water purifiers, beverage dispensers, and even smart campus systems. - • **Universal Compatibility:** Fits hosepipes with 5-7mm inner diameter (G1/4 inch connector) for seamless integration. ## Overview The GREDIA 1/4" Water Flow Sensor is a compact, food-grade flowmeter designed for precise liquid measurement between 0.3 to 6 L/min. Operating on a broad DC voltage range (5-24V) and supporting up to 0.8Mpa water pressure, it features a reliable hall effect sensor with ±3% accuracy. Its leak-proof design and universal G1/4 inch connector make it perfect for professional-grade water heaters, coffee machines, and smart fluid control systems. Sold in a convenient pack of two, it’s engineered for durability and easy installation. ## 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=(98*Q)±3%, Q=L/Min, error: ±3% Working range: 0.3-6L/min Working voltage: DC 5-24 V Water Pressure: ≤0.8Mpa Liquid temperature: 0-100℃ Maximum current consumptiont: 10 mA(DC 5V) Size: 58mm x 34mm x 26mm(L*W*H) Wire length: 15 cm Refer to the wiring: Red wire: VCC(+) Black wire: GND(-) Yellow wire: Signal output Package: 2 x G1/4 inch flowmeter connect hosepipe Review: Works as expected - As info, I ordered/received the 2pc Gredia GR-R401 G1/4 Hose Pipe flavor. I got 2 so I could disassemble one and have the other unfettered in case I destroyed the one I was frackin with. I am using this on a water cooled 3d printer hot end, to give Klipper programmatic flow indication. These are 3 full pulses per revolution (6 edges). As another user reviewed, there is a reduction of the ID on the inlet side of the flow meter. I presume this was so that there was a focus of pressure on the rotor blades. It is 1.5mm in diameter (checked with a 1.5mm shaft). At ~35 deg C coolant temp, I am getting ~900-1000 PPM (~333 rpm @ 3 PPR). As the fluid warms, it becomes more viscous and flow increases. I am happy with the product. I opened the orifice on the 2nd unit to 2mm and will test to see if I get comparable usability with the larger orifice, and see if I get overall better flow/performance from the cooling system. Review: Flows <1LPM - This item claims to be able to flow 6L/minute. I couldn't get more than about 1L/minute through it. I looked into the inlet port, and there's a flow restrictor molded into the port. I measured it's diameter at about 1.3mm. A 1.3mm orifice would flow only 2LPM even with a 200PSI pressure drop, far more than this unit is rated for. ## Features - Connect to a hosepipe whose inner diameter is about 5 to 7 mm( G1/4 inch connector), comes with 2 pieces - Flow range:0.3-6L/min, Water Pressure: ≤0.8Mpa - Working voltage: DC 5-24 V, F=(98*Q)±3%, Q=L/Min - Material: food grade plastic, all raw materials conform to the ROHS test standard - Wide application: It is mainly used in water heater, coffee machine, water purifier, drinking fountain, beverage machine, campus smart card equipment, etc. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07RF57QF8 | | Best Sellers Rank | #33,589 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #13 in Flowmeters | | Date First Available | May 2, 2019 | | Item Weight | 2.08 ounces | | Item model number | GR-R401P2 | | Manufacturer | GREDIA | | Package Dimensions | 3.46 x 3.19 x 1.22 inches | ## Images ![1/4" Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter Connect Hosepipe 0.3-6L/min (Pack of 2） - Image 1](https://m.media-amazon.com/images/I/61Uoj8NQr8L.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works as expected *by T***F on April 21, 2022* As info, I ordered/received the 2pc Gredia GR-R401 G1/4 Hose Pipe flavor. I got 2 so I could disassemble one and have the other unfettered in case I destroyed the one I was frackin with. I am using this on a water cooled 3d printer hot end, to give Klipper programmatic flow indication. These are 3 full pulses per revolution (6 edges). As another user reviewed, there is a reduction of the ID on the inlet side of the flow meter. I presume this was so that there was a focus of pressure on the rotor blades. It is 1.5mm in diameter (checked with a 1.5mm shaft). At ~35 deg C coolant temp, I am getting ~900-1000 PPM (~333 rpm @ 3 PPR). As the fluid warms, it becomes more viscous and flow increases. I am happy with the product. I opened the orifice on the 2nd unit to 2mm and will test to see if I get comparable usability with the larger orifice, and see if I get overall better flow/performance from the cooling system. ### ⭐ Flows <1LPM *by B***S on December 10, 2019* This item claims to be able to flow 6L/minute. I couldn't get more than about 1L/minute through it. I looked into the inlet port, and there's a flow restrictor molded into the port. I measured it's diameter at about 1.3mm. A 1.3mm orifice would flow only 2LPM even with a 200PSI pressure drop, far more than this unit is rated for. --- ## 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.is/products/135643087-1-4-water-flow-sensor-food-grade-switch-hall-effect](https://www.desertcart.is/products/135643087-1-4-water-flow-sensor-food-grade-switch-hall-effect) --- *Product available on Desertcart Iceland* *Store origin: IS* *Last updated: 2026-05-06*