Kalam Institute For Technical Education-Kite

Switching Mode	NO
Sensing Distance	4mm
Output Type	NPN
Supply Voltage	220 V
Set Contains	5
Colour	Blue (Base)
Model Name/Number	HCSR 04

Ultrasonic proximity sensors detect objects by emitting sound waves and measuring the time it takes for those waves to reflect back after hitting an object, allowing them to determine the distance. This method is used to detect presence or absence of objects without physical contact.