Seeed 114991172 Grove - Water Flow Sensor YF-B2 Water flow sensor consists of a copper body, a water rotor, and a hall-effect sensor. When water flows through the rotor, the rotor rolls and its speed changes with different rate of flow. The hall-effect sensor outputs the corresponding pulse signal. This one is suitable to detect flow in water dispenser or coffee machine. * Weight: G.W 99g * Battery: Excluded * Mini. Working Voltage: DC 4.5V * Max. Working Current: 15mA (DC 5V) * Working Voltage: DC 5V~15V * Flow Rate Range: 1~25L/min * Frequency: F=(11*Q)Q=L/MIN±3% * Load Capacity: ≤10mA (DC 5V) * Operating Temperature: 0 ~ 80℃ * Liquid Temperature: ≤120℃ * Operating Humidity: 35%～90%RH * Water Pressure: ≤1.75MPa * Storage Temperature: -25～+ 80℃ * Storage Humidity: 25%～95%RH * Interface Dimensions: G1/2Inch * Error Range: (1~30L\MIN) ±3% * Material Description: H57Copper+POM * Output Pulse High Level: >DC 4.7V (Input Voltage DC5V) * Output Pulse Low Level: <DC 0.5V (Input Voltage DC5V) * Output Pulse Duty Cycle: 50%±10% https://elecena.pl/product/27185446/seeed-114991172-grove-water-flow-sensor-yf-b2 2024-11-08 https://elecena.pl/product/27185446/seeed-114991172-grove-water-flow-sensor-yf-b2 2025-04-30