MQ-4 Natural Gas Methane Gas Sensor Module For Arduino AB0143

YF-S201 Water Flow Sensor Module with Magnetic Hall Effect – 1 to 30 Litre/Minute (Black) – AB0061

The YF-S201 Water Flow Sensor Module (AB0061) is a high-performance Hall Effect-based flow measurement sensor designed to accurately monitor the flow rate and volume of water in pipes. It features an internal rotor and magnetic Hall Effect sensor that generates electrical pulse signals proportional to the water flow. This sensor is widely used in Arduino, ESP32, Raspberry Pi, and IoT-based projects for water management, smart irrigation, liquid dispensing systems, and industrial monitoring applications. The sealed sensor design ensures reliable operation while keeping the electronic sensing element protected from water exposure.