YF-S201 Hall Effect Water Flow Sensor (1-30L/min, 2.0MPa)
$7
Ultrasonic Sensor HC-SR04
$3
The HC-SR04 Ultrasonic Sensor is a high-precision distance measurement module that uses ultrasonic sound waves to detect objects and measure distances ranging from 2cm to 400cm with an accuracy of ±3mm. It is ideal for robotics, obstacle detection, automation, and IoT applications.
The HC-SR04 Ultrasonic Sensor is a widely used non-contact distance measurement sensor that utilizes ultrasonic waves to determine object distances. It operates by emitting an ultrasonic pulse and measuring the time it takes for the echo to return, enabling accurate distance calculations.
This module is commonly used in robotics, automation, security systems, and object detection applications due to its high accuracy, low cost, and ease of integration with microcontrollers like Arduino, ESP32, Raspberry Pi, and PIC.
Key Features:
✅ Non-Contact Distance Measurement – Measures distances between 2cm to 400cm
✅ High Accuracy – ±3mm measurement precision
✅ Ultrasonic Technology – Uses sound waves to detect objects
✅ Easy Integration – Works with Arduino, ESP32, Raspberry Pi, PIC, STM32, and other MCUs
✅ Low Power Consumption – Operates on 5V with <2mA standby current
✅ Simple 4-Pin Interface – VCC, Trigger, Echo, GND
✅ Compact Design – Ideal for embedded and space-limited applications
The HC-SR04 is an essential sensor for applications requiring precise distance measurement, obstacle avoidance, and environmental sensing.
