The CS100 Ultrasonic Distance Measuring Sensor Module (HC-SR04, Made in India) is a high-precision and reliable module used for distance measurement and object detection in robotics, automation, and DIY electronics projects. This sensor operates by emitting 40 kHz ultrasonic waves and calculating the time taken for the waves to reflect back from an object, allowing accurate distance measurement from 2 cm up to 4 meters.

Designed for simplicity and integration, the CS100 module features 4 pins: VCC, Trig, Echo, and GND. A short TTL trigger pulse initiates measurement, and the sensor returns a pulse-width TTL output proportional to the distance, which can be easily read by Arduino, Raspberry Pi, ESP32, AVR, PIC, or 8051 microcontrollers.

With an accuracy of ±3 mm and fast response time, this sensor is perfect for robotic obstacle avoidance, automated parking sensors, liquid level detection, proximity alerts, and distance-based automation systems. Its compact design, stable operation, and Made-in-India quality assurance make it an excellent choice for both hobbyists and professionals.

The module is widely adopted in educational labs, robotics competitions, IoT devices, and industrial automation projects, providing a cost-effective and reliable solution for accurate distance measurement.