Electronic components that detect and measure environmental humidity in manufacturing production equipment and control systems. They convert relative humidity or absolute humidity into electrical signals using detection methods such as capacitive, resistive, and thermal conductivity types. Used for machining environment management in NC machine tools, condensation prevention control in automation equipment, humidity monitoring in clean rooms, and rust prevention management during metal processing. Available with analog outputs (4-20mA, 0-10V) and digital outputs (I2C, SPI), achieving industrial-grade high precision and reliability. Composite types with temperature sensors and waterproof/dustproof specification products are also abundantly available.