The HC-SR04 is an affordable and versatile ultrasonic sensor, capable of both detecting the presence of an object, such as a PIR sensor, and precisely measuring the distance to that object. With its ultrasonic technology, it provides reliable and accurate detection, making it an ideal choice for many projects, such as proximity detection systems, obstacle avoidance robots, and many others. With its low cost and remarkable performance, the HC-SR04 is an indispensable tool for all projects requiring distance detection.

Features:

• Thickness of acrylic mounting bracket: 4mm 
• Operating voltage: DC 5V 
• Quiescent current: Less than 2mA 
• Voltage output: High 5V, low 0V
• Detection angle: Less than 15 degree 
• Detection distance: 2cm - 450cm 
• Accuracy: 3mm
• Resolution : 0.3 cm 
• Measuring Angle: 30 degree 
• Trigger Input Pulse width: 10uS