{"product_id":"water-flow-sensor-1-2-zj-s201","title":"Water Flow Sensor 1\/2\" (ZJ-S201)","description":"\u003ch5\u003eDescription\u003c\/h5\u003e\n\u003cp\u003eThe \u003cstrong\u003eZJ-S201 1\/2\" Water Flow Sensor\u003c\/strong\u003e is a reliable and easy-to-use device designed to sit in line with your water line to measure how much liquid has moved through it. The sensor contains a pinwheel rotor and an integrated magnetic Hall effect sensor that outputs an electrical pulse with every revolution. The Hall effect sensor is completely sealed from the water pipe, ensuring the sensitive electronics stay dry and safe.\u003c\/p\u003e\n\n\u003cp\u003eThe sensor features a simple three-wire interface: Red (2.5V-24V DC power), Black (Ground), and Yellow (Hall effect pulse output). By counting the pulses from the output of the sensor using a microcontroller like an Arduino, you can easily calculate water flow. The pulse signal is a standard square wave, making it straightforward to log and convert into liters per minute using the formula: \u003cstrong\u003ePulse frequency (Hz) \/ 7.5 = flow rate in L\/min\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eNote: This is not a high-precision industrial sensor. The pulse rate can vary slightly depending on flow rate, fluid pressure, and sensor orientation. It will need careful calibration if better than 10% precision is required, but it is excellent for basic measurement and DIY IoT tasks!\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003ePeople also search for:\u003c\/strong\u003e zj-s201 sensor, 1\/2 inch water flow sensor, arduino liquid flow meter, hall effect water sensor, smart irrigation flow sensor.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch5\u003eSpecifications\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e ZJ-S201\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSensor Type:\u003c\/strong\u003e Magnetic Hall Effect\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorking Voltage:\u003c\/strong\u003e 2.5V to 24V DC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Current Draw:\u003c\/strong\u003e 15mA (at 5V)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorking Flow Rate:\u003c\/strong\u003e 1 to 30 Liters\/Minute\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Water Pressure:\u003c\/strong\u003e ≤ 1.75 MPa\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccuracy:\u003c\/strong\u003e ±10%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Duty Cycle:\u003c\/strong\u003e 50% ± 10%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlow Rate Formula:\u003c\/strong\u003e Frequency (Hz) = 7.5 × Flow rate (L\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePipe Connections:\u003c\/strong\u003e 1\/2\" Inner Diameter (ID), 3\/4\" Outer Diameter (OD)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorking Temperature Range:\u003c\/strong\u003e -25°C to +80°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorking Humidity Range:\u003c\/strong\u003e 35% - 80% RH\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCable Length:\u003c\/strong\u003e Approx. 15cm\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch5\u003eApplications\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmart Gardening:\u003c\/strong\u003e Monitoring water usage in automated drip irrigation or hydroponic systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHome Automation:\u003c\/strong\u003e Building smart water meters to track household water consumption.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomated Dispensers:\u003c\/strong\u003e Measuring liquids for custom beverage dispensers or liquid mixing vats.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch5\u003eFrequently Asked Questions (FAQ)\u003c\/h5\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What do the three wire colors mean?\u003c\/strong\u003e\u003cbr\u003e\nA: Standard wiring is: \u003cstrong\u003eRed\u003c\/strong\u003e is VCC (Power Input, 2.5V-24V DC), \u003cstrong\u003eBlack\u003c\/strong\u003e is Ground (GND), and \u003cstrong\u003eYellow\u003c\/strong\u003e is the PWM\/Pulse Signal Output that connects to your microcontroller's digital input pin.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Does it matter which direction the water flows?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes. There is a small arrow molded into the plastic casing of the sensor. Water must flow in the direction of this arrow to properly spin the rotor and generate an accurate reading.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How do I improve the accuracy of the sensor?\u003c\/strong\u003e\u003cbr\u003e\nA: Because fluid pressure and orientation affect the spin rate, the best way to improve accuracy is to install the sensor in its final, permanent position and run a known quantity of water (e.g., exactly 10 liters) through it. Count the total pulses and adjust the \u003ccode\u003e7.5\u003c\/code\u003e multiplier in your code to match your specific real-world setup.\u003c\/p\u003e\n\n\u003ch5\u003ePackage Includes\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003e1 × ZJ-S201 1\/2\" Water Flow Sensor\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SEA","offers":[{"title":"Default Title","offer_id":48279887741166,"sku":"SEN-28159","price":189.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2132\/9029\/files\/zjs201_top_view.jpg?v=1783584146","url":"https:\/\/www.tomsonelectronics.com\/products\/water-flow-sensor-1-2-zj-s201","provider":"Tomson Electronics ","version":"1.0","type":"link"}