Enhance your water system monitoring with this high-quality Water Flow Sensor, designed for precise and reliable flow detection. Crafted from premium materials, this sensor offers a long service life and stable performance in a compact design. Ideal for installation at the water inlet of various water machines, it accurately measures influent flow, making it perfect for water coolers, coffee machines, and water filters. Key Features: · Durable Construction: Made from high-quality materials to ensure long-lasting performance and reliability. · Accurate Flow Monitoring: Detects water flow within a range of 0.3 to 6 liters per minute with an accuracy of ±3%, and improved accuracy of ±2% within 0.15-3 L/min for precise measurement. · Compact and Stable: Small-sized sensor with stable performance for easy installation and consistent operation. · Versatile Compatibility: Suitable for use in water coolers, coffee machines, water filters, and other water-related appliances. · Easy Wiring: Features a simple three-wire connection with red (+), black (-), and yellow (signal output) wires providing an NPN pulse signal output for seamless integration. · Reliable Electrical Specifications: Operates within a DC 5-24V voltage range, with a water pressure resistance of 0.35MPa and insulation resistance greater than 100MΩ, ensuring safe and efficient operation. · Precise Pulse Output: Flow pulse frequency follows f = (73 * Q) ±2%, with a 50% ±10% duty cycle and output pulse high level above DC 4.7V (at 5V input), enabling accurate flow rate monitoring. Specifications: · Model: YF-S402 · Monitoring Range: 0.3-6L/min · Accuracy: ±3% (general), ±2% (0.15-3L/min) · Wiring Method: Red (+), Black (-), Yellow (NPN Pulse Signal Output) · Water Pressure Resistance: 0.35MPa · Operating Voltage Range: DC 5-24V · Insulation Resistance: >100MΩ · Flow Pulse Formula: f = (73 * Q) ±2%, Q = L/min · Output Pulse High Level: >DC 4.7V (at DC 5V input) · Output Pulse Duty Cycle: 50% ±10% Package Includes: · 1 x Water Flow Sensor This Water Flow Sensor is an essential component for accurate and efficient water flow detection in various water appliances. Its durable construction, precise measurement capabilities, and easy installation make it an excellent choice for improving water system monitoring and control.