--- product_id: 454274514 title: "2\" Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter 10-200L/min" brand: "gredia" price: "AED 407" currency: AED in_stock: true reviews_count: 6 category: "Gredia" url: https://www.desertcart.ae/products/454274514-2-water-flow-sensor-food-grade-switch-hall-effect-flowmeter store_origin: AE region: United Arab Emirates --- # Material: Food-Grade Plastic Flow Rate: 10-200L/min Voltage: DC 5-24V 2" Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter 10-200L/min **Brand:** gredia **Price:** AED 407 **Availability:** ✅ In Stock ## Summary > 💡 Flow with the Flow: Elevate Your Water Management Game! ## Quick Answers - **What is this?** 2" Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter 10-200L/min by gredia - **How much does it cost?** AED 407 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ae](https://www.desertcart.ae/products/454274514-2-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 - • **Easy Installation:** Connects effortlessly to 2 inch BSPT male threads. - • **Durable & Compliant:** Crafted from food-grade materials, meeting ROHS standards. - • **Versatile Applications:** Ideal for petrochemical, residential, and agricultural use. - • **Robust Pressure Handling:** Handles water pressure up to 1.75Mpa with ease. - • **Precision Flow Measurement:** Achieve accuracy with ±2% deviation for reliable readings. ## Overview The GREDIA 2" Water Flow Sensor is a high-performance Hall Effect flowmeter designed for a wide range of applications, from industrial to residential. With a flow rate of 10-200L/min and a robust construction from food-grade plastic, this sensor ensures accurate and reliable performance while adhering to strict safety standards. ## 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: 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 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 | |---------------|-------| | Brand | GREDIA | | Manufacturer | GREDIA | | Country of Origin | USA | | Model number | GR-216 | | Number of Memory Sticks | 1 | | Item Weight | 209 g | | Package Dimensions | 16.79 x 14.81 x 7.19 cm; 209 g | | Item model number | GR-216 | | Are batteries included? | No | ## Images ![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/61ngULnjCGL.jpg) ![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/61lr6GNjfOL.jpg) ![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/61yXKt9b+OL.jpg) ![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/61waUhjDKEL.jpg) ![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/61F2EvvD5eL.jpg) ## Available Options This product comes in different **Size** options. ## 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 ### ⭐⭐⭐⭐⭐ 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 2" Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter 10-200L/min - GREDIA 3/8" Quick Connect Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter Fluid Meter Counter 0.3-10L/min (Pack of 2） - JESSINIE 2Pcs YF-S201C DC3.5-24V G1/2" Transparent Flow Sensor Turbine Flowmeter Water Flow Sensor Transparent Water Flow Meter YF-S201C Range 1-30L/min --- ## 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.ae/products/454274514-2-water-flow-sensor-food-grade-switch-hall-effect-flowmeter](https://www.desertcart.ae/products/454274514-2-water-flow-sensor-food-grade-switch-hall-effect-flowmeter) --- *Product available on Desertcart United Arab Emirates* *Store origin: AE* *Last updated: 2026-07-12*