YF-S401 Water Flow Sensor Hall Effect 0.1–5L/min Leakproof

Description �� YF-S401 Water Flow Sensor Hall Effect 0.1–5L/min Leakproof | AuscomTech The YF-S401 Water Flow Sensor is a compact, high-precision hall-effect flow sensor designed for accurate low-flow water measurement in appliances and automation systems. Built with a durable PVC body, stainless steel shaft, and high-quality hall sensor, the YF-S401 produces a stable pulse output proportional to flow rate. It is widely used in coffee machines, water dispensers, heaters, and embedded control systems where reliable, repeatable water flow detection is required. ⭐ Key Features �� Hall Effect Flow SensingHigh-quality hall sensor delivers stable pulse output for accurate flow measurement. �� Low Flow Measurement RangeDesigned for precise monitoring of small flows from 0.1 to 5 L/min. �� Durable & Leakproof ConstructionPVC housing with high-sealing performance and internal sealing ring for long-term reliability. ⚙️ Stainless Steel ShaftAbrasion-resistant axis improves durability and extends service life. �� Wide Operating VoltageOperates from DC 5–24V, suitable for both low-voltage electronics and control systems. �� RoHS Compliant MaterialsManufactured with environmentally friendly, compliant materials. �� Technical Specifications Model: YF-S401Sensor Type: Hall effect water flow sensorOperating Voltage: DC 5–24V (min. 4.5V)Max Current: ≤15mA @ DC 5VLoad Capacity: ≤10mA @ DC 5VFlow Range: 0.1–5 L/minAccuracy: ±2%Pulse Output Duty Cycle: 50% ±10%Pulse Output High Level: >4.7V (at 5V supply)Flow Pulse Formula: F = (98 × Q) ±2% (Q = L/min)Internal Diameter: 1.2 mm Water Resistance (Static): 0.35 MPaMax Water Pressure: ≤0.8 MPaOperating Temperature: ≤80°CLiquid Temperature: ≤120°COperating Humidity: 35%–90% RHStorage Temperature: −25°C to 80°CStorage Humidity: 25%–95% RHInsulation Resistance: >100 MΩ Dimensions: 58 × 35 × 27 mmWeight: Approx. 25 g ⚠️ Important Notes • Install vertically with an inclination ≤5°• Ensure liquid temperature does not exceed 120°C• Avoid strong vibration, shock, or corrosive chemicals• Pulse output requires frequency measurement in software �� Compatible With • Arduino (Uno, Nano, Mega)• ESP32 / ESP8266• STM32 microcontrollers• PLC digital input modules• Coffee machines and water dispensers• Embedded control systems ⚙️ Typical Applications • Coffee machines• Water dispensers• Water heaters• Low-flow water monitoring• Automation and control systems• Embedded electronics projects �� Wiring Reference • Red: VCC (Positive)• Yellow: Pulse Signal Output• Black: GND (Negative) �� Package Includes • 1 × YF-S401 Water Flow Sensor