{"title":"Gravity: Arduino Digital Water Flow Sensor - 1/8","handle":"gravity-arduino-digital-water-flow-sensor-1-8","url":"/products/gravity-arduino-digital-water-flow-sensor-1-8","description":"    The Water Flow sensor measures the rate of a liquid flowing through it. The YF-S401 water flow sensor consists of a plastic valve body, flow rotor and hall effect sensor. It is usually used at the inlet end to detect the amount of flow. When liquid flows through the sensor, a magnetic rotor will rotate and the rate of rotation will vary with the rate of flow. The hall effect sensor will then output a pulse width signal. Connect it to a microcontroller and you can monitor multiple devices such as your coffee maker, sprinkler or anything else, and control the water flow rate to suit your needs!  Note: *A 6 mm hose is recommended *Avoid unit contact with corrosive chemicals *The unit must be installed vertically, tilted no more than 5 degrees *Liquid temperature should be less than 120 C to avoid damage to unit SPECIFICATIONSInner Diameter: 4 mm Outside diameter: 7 mm Proof Water Pressure: <0.8 MPa Water Flow Range: 0.3-6 L/min Voltage Range: 5~12 V Operating Current: 15 mA (DC 5V) Insulation Resistance: >100 MΩ Accuracy: ±5% (0.3-3L/min) The Output Pulse High Level: >4.5 VDC (DC input voltage 5 V) The Output Pulse Low Level: <0.5 VDC (DC input voltage 5 V) Output Pulse Duty Ratio: 50% ± 10% Water-flow Formula: 1L = 5880 square waves Working Humidity Range: 35% ~ 90% RH (no frost) Dimension: 58*35*26 mm/2.28*1.37*1.02 inches Weight: 30g DOCUMENTSProduct WIKI More Documents SHIPPING LISTGravity - Water Flow Sensor - 1/8\" x1  ","vendor":"DFRobot","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":13767,"title":"Default Title","sku":"DF-SEN0216","price":16.8,"on_sale":false,"in_stock":true,"available_quantity":9,"option1":"Default Title"}],"documents":[{"title":"Supplier page — dfrobot.com","type":"supplier_description","type_label":"Supplier Description","url":"https://littlebirdelectronics.com.au/rails/active_storage/blobs/redirect/BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVGkDnCMBSSIIcHVyBjsAVEkiDGJsb2JfaWQGOwBG--1ff61720499be72f457d58058f9429efdbc04b35/gravity-arduino-digital-water-flow-sensor-1-8-dfrobot-com-2026-05-13.pdf","link":false,"file_extension":"PDF","file_size":477234,"description":"Snapshot of https://www.dfrobot.com/product-1531.html (captured 13 May 2026)"},{"title":"SEN0216 water flow sensor cad 1.0","type":"cad_data","type_label":"CAD Data","url":"https://littlebirdelectronics.com.au/rails/active_storage/blobs/redirect/BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVGkD3EADSSIIcHVyBjsAVEkiDGJsb2JfaWQGOwBG--4b9997fad78868ba7f84fd0f77bff32d3c9be1ed/SEN0216_water-flow-sensor_cad_1.0.zip","link":false,"file_extension":"ZIP","file_size":114019}]}