---
title: What is the working principle of ultrasonic sensors?
description: How does a ultrasonic sensor work?
---

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# What is the working principle of ultrasonic sensors?

## How does a ultrasonic sensor work?

The ultrasound is generated with a piezo element. The ultrasound wave hits a medium and gets reflected. Ultrasonic sensors operate with a frequency up to 500 KHz.

The echo hits the piezo element. Distance to the object can be calculated by measuring the time between emission and echo.

 

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