--- product_id: 77621193 title: "Robodo 1/2'' Water Flow Hall Sensor Control Switch Fluid Flow Meter Flowmeter Counter 1-30L/min Compatible with iduino YF-S201 (White or Black)" brand: "robodo" price: "€ 8.67" currency: EUR in_stock: true reviews_count: 8 category: "Robodo" url: https://www.desertcart.at/products/77621193-robodo-1-2-water-flow-hall-sensor-control-switch-fluid store_origin: AT region: Austria --- # PWM pulse output for precise digital reading Measures 1-30L/min flow rate Easy Arduino interrupt pin 2 integration Robodo 1/2'' Water Flow Hall Sensor Control Switch Fluid Flow Meter Flowmeter Counter 1-30L/min Compatible with iduino YF-S201 (White or Black) **Brand:** robodo **Price:** € 8.67 **Availability:** ✅ In Stock ## Summary > 💧 Flow smarter, not harder — measure every drop with precision! ## Quick Answers - **What is this?** Robodo 1/2'' Water Flow Hall Sensor Control Switch Fluid Flow Meter Flowmeter Counter 1-30L/min Compatible with iduino YF-S201 (White or Black) by robodo - **How much does it cost?** € 8.67 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/products/77621193-robodo-1-2-water-flow-hall-sensor-control-switch-fluid) ## Best For - robodo enthusiasts ## Why This Product - Trusted robodo brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Precision Flow Tracking:** Accurately monitors liquid flow from 1 to 30 liters per minute, empowering smart resource management. - • **Versatile Application Scope:** Ideal for both domestic and industrial liquid consumption monitoring, making you the efficiency guru. - • **Compact & Lightweight Design:** At just 50g and 5x5x5 cm, fits effortlessly into any industrial or DIY setup without bulk. - • **Durable Hall Sensor Technology:** Utilizes advanced hall effect sensing for reliable pulse generation and flow measurement. - • **Seamless Arduino Compatibility:** Plug-and-play with Arduino interrupt pin 2 for real-time, hassle-free data capture. ## Overview The Robodo 1/2'' Water Flow Hall Sensor (YF-S201) is a compact, lightweight flowmeter capable of measuring liquid flow rates between 1 and 30 liters per minute. Designed for easy integration with Arduino via interrupt pin 2, it outputs PWM pulses for precise digital flow monitoring. Suitable for both industrial and domestic applications, this sensor offers reliable hall effect technology in a sleek form factor. ## Description Product Description Learning electronics or prototyping can seem like a nightmare! With thousands of electronic components available in the market, it just seems too complicated and cumbersome. We strive to make electronics easier, accessible, clutter-free for Novices and Advanced users. You could be an advanced user like a professional lab engineer, electronic major student, experienced hobbyists, or a novice user who doesn't have much electronics knowledge. Fear not, we got you both covered. As our tagline suggests - "The Last Piece of the Puzzle or Maybe the First" Water Flow Sensor Specfications Model : YF-S201 Working Voltage (V) : 5~18 V Max current draw : 15mA @ 5V Working Flow Rate (Liters/Minute) : 1~30 L/M Operating Temperature range (℃) : -25 ~ +80 Operating Humidity Range : 35% – 80% RH Accuracy : ±10% Maximum water pressure : 2.0 MPa Note - This isn’t a precision sensor, and the pulse rate does vary a bit depending on the flow rate, fluid pressure, and sensor orientation. It will need careful calibration if better than 10% precision is required. However, it’s great for basic measurement tasks! Water Flow Sensor By Robodo Description This is YF-S201 Water Flow Measurement Sensor with 1-30Leter/min Flow Rate in black color. This sensor sits in line with your water line and contains a pinwheel sensor to measure how much liquid has moved through it. There’s an integrated magnetic hall effect sensor that outputs an electrical pulse with every revolution. The hall effect sensor is sealed from the water pipe and allows the sensor to stay safe and dry. By counting the pulses from the output of the sensor, you can easily calculate water flow. Each pulse is approximately 2.25 milliliters. Product Applications Water Flow sensor is basically used to take a note of how much water has been transferred from one area to the other. Water flow sensor consists of a plastic valve body, a water rotor and a hall-effect sensor . When water flows through the rotor, the rotor start rolling after feeling the pressure. Working & Features Water flow sensor consists of a plastic valve from which water can pass. A water rotor along with a hall effect sensor is present the sense and measure the water flow . When water flows through the valve it rotates the rotor. This change is calculated as output as a pulse signal by the hall effect sensor . FEATURES The simple and compact module. Easy to Install. High Sealing Performance. High-Quality Hall Effect Sensor. In The Box Water Flow Sensor by Robodo comes included with 1 x YF-S201 Water Flow Measurement Sensor with 1-30 Liter/min Flow Rate – Black. Other Details Output duty cycle : 50% +-10% Output rise time (µsec) : 0.04 µsec Pulses per Liter : 450 Output fall time (µsec) : 0.18 µsec Outer diameter (mm) : 20 mm Review: Reliables - Supper working Review: Poor quality - Quality is highly questionable. The hall sensor failed within 30min. ## Features - Water flow sensor can be used to measure the flow of liquids, i.e. the consumption of liquids in industrial or domestic usage. - You just need to connect to Arduino interrupt pin 2, and can measure the number of PWM pulse/interrupt per unit of time. - Please scroll below for more details of the product ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00REJ7QF2 | | Best Sellers Rank | #8,185 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #14 in Flowmeters | | Brand | Robodo | | Colour | Red | | Country of Origin | China | | Customer Reviews | 3.4 3.4 out of 5 stars (63) | | Date First Available | 24 December 2014 | | Generic Name | Electronic.Modules | | Importer | Bombay Electronics, 13B Shamrao Vithal Marg, Off Lamington Road. Mumbai - 400007 | | Included Components | Robodo 1/2'' Water Flow Hall Sensor (White or Black) | | Item Dimensions LxWxH | 50 x 50 x 50 Millimeters | | Item Height | 50 Millimeters | | Item Weight | 50 g | | Item Width | 50 Millimeters | | Item model number | YF-S201 | | Manufacturer | Bombay Electronics, 13B Shamrao Vithal Marg, Off Lamington Road. Mumbai - 400007, Gen | | Model number | YF-S201 | | Number of Memory Sticks | 1 | | Packer | Bombay Electronics, 13B Shamrao Vithal Marg, Off Lamington Road. Mumbai - 400007 | | Product Dimensions | 5 x 5 x 5 cm; 50 g | ## Images ![Robodo 1/2'' Water Flow Hall Sensor Control Switch Fluid Flow Meter Flowmeter Counter 1-30L/min Compatible with iduino YF-S201 (White or Black) - Image 1](https://m.media-amazon.com/images/I/41Hwk-2wkUL.jpg) ![Robodo 1/2'' Water Flow Hall Sensor Control Switch Fluid Flow Meter Flowmeter Counter 1-30L/min Compatible with iduino YF-S201 (White or Black) - Image 2](https://m.media-amazon.com/images/I/51F9Pa-Ii5L.jpg) ![Robodo 1/2'' Water Flow Hall Sensor Control Switch Fluid Flow Meter Flowmeter Counter 1-30L/min Compatible with iduino YF-S201 (White or Black) - Image 3](https://m.media-amazon.com/images/I/51ppxjuCOIL.jpg) ![Robodo 1/2'' Water Flow Hall Sensor Control Switch Fluid Flow Meter Flowmeter Counter 1-30L/min Compatible with iduino YF-S201 (White or Black) - Image 4](https://m.media-amazon.com/images/I/51Udg6CT1yL.jpg) ![Robodo 1/2'' Water Flow Hall Sensor Control Switch Fluid Flow Meter Flowmeter Counter 1-30L/min Compatible with iduino YF-S201 (White or Black) - Image 5](https://m.media-amazon.com/images/I/51eKmFvqrdL.jpg) ## Questions & Answers **Q: If air is flowing through the sensor will it sense? I want it to be use for sensing water only** A: Can it detect the direction of flow **Q: How much voltage does it require? And can it stop water flowing through a tap like solenoid valve?** A: 5-24V working voltage.Yes we can stop water flowing through solenoid valve using any controller like PLC **Q: can i use for 1/4" tube of water purifier, so that i can measure water flow** A: Yes ,you can use it. If you want the programm for counting & storage of data -I can provide that. **Q: How to calculate flow??** A: As per the Achilles Heel of any water system - Flow rates are measured in gallons per minute (gpm). Considering standard velocity of water as 8 feet per second -the flow rate for different diameters of pipe will be as follows:1/2" = 8gpm / 1" = 21gpm / 1 1/2" = 46gpm / 2" = 80gpm and so on.The flow rate may vary depending on the type of piping we use. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Reliables *by S***. on 15 March 2026* Supper working ### ⭐ Poor quality *by C***. on 13 January 2026* Quality is highly questionable. The hall sensor failed within 30min. ### ⭐⭐⭐⭐ b *by A***R on 16 January 2016* A ## Frequently Bought Together - Robodo 1/2'' Water Flow Hall Sensor Control Switch Fluid Flow Meter Flowmeter Counter 1-30L/min Compatible with iduino YF-S201 (White or Black) - ApTechDeals Breadboard 840 point with jumper wires Set(10+10+10) - RoboCraze UNO R3 SMD Board compatible with Arduino | Development Board with USB cable --- ## 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/77621193-robodo-1-2-water-flow-hall-sensor-control-switch-fluid](https://www.desertcart.at/products/77621193-robodo-1-2-water-flow-hall-sensor-control-switch-fluid) --- *Product available on Desertcart Austria* *Store origin: AT* *Last updated: 2026-07-09*