The Ultrasonic modules category at Roshanex holds electronic parts that work with high-frequency sound. It includes the HC-SR04 Ultrasonic Distance Sensor and the Mist Maker DK3-24 20mm Ultrasonic Humidifier. The HC-SR04 measures the distance to an object, so it suits robots, parking aids and level sensing projects.

Meanwhile, the mist maker turns water into fine mist for humidifiers, fountains and decor pieces. Students, hobbyists and engineers often pair these parts with Arduino and other microcontroller boards. If you are building an obstacle-avoiding robot or a small humidifier, start here. Compare both ultrasonic modules, then order online with delivery across Pakistan.