--- title: What are the environmental influences on ultra sonic sensors? description: Factors affecting ultra sonic sensors --- [Skip to content](https://kb.innovatingautomation.asia/en/index/what-are-the-environmental-influences-on-ultra-sonic-sensors#main-content) English Show submenu for translations ![Balluff_Logo.png\]](https://kb.innovatingautomation.asia/hs-fs/hubfs/Balluff_Logo.png?height=40&name=Balluff_Logo.png) - [Default HubSpot Blog](https://blog.innovatingautomation.asia/blog) Open main navigation Close main navigation - [Default HubSpot Blog](https://blog.innovatingautomation.asia/blog) - English Show submenu for translations - www.balluff.com www.balluff.com Hello! What can I do for you? - There are no suggestions because the search field is empty. 1. [Help Center](https://kb.innovatingautomation.asia/en/index?hsLang=en) 2. [Basic Knowledge](https://kb.innovatingautomation.asia/en/index/basic-knowledge?hsLang=en) # What are the environmental influences on ultra sonic sensors? ## Factors affecting ultra sonic sensors The speed of the sound depends on ambient temperature. So for proper functioning of ultrasonic sensor the temperature should not vary or at least vary slowly. Change in air humidity values also may lead to errors. The sound speed depends on the medium. They detect nearly all materials that reflect sound. Soft and airy materials have a bad reflection.   ![image-png-Aug-28-2020-06-34-23-88-PM](https://kb.innovatingautomation.asia/hs-fs/hubfs/image-png-Aug-28-2020-06-34-23-88-PM.png?width=311&name=image-png-Aug-28-2020-06-34-23-88-PM.png) Reflection on even surface       ![](https://kb.innovatingautomation.asia/hubfs/image-png-Aug-28-2020-06-41-49-42-PM.png) Reflection on uneven surface     - [Application](https://kb.innovatingautomation.asia/en/index/application?hsLang=en) - [Basic Knowledge](https://kb.innovatingautomation.asia/en/index/basic-knowledge?hsLang=en) - [Installation](https://kb.innovatingautomation.asia/en/index/installation?hsLang=en) - [Sales FAQs](https://kb.innovatingautomation.asia/en/index/sales-faqs?hsLang=en) - [Selection](https://kb.innovatingautomation.asia/en/index/selection?hsLang=en) - [Function consultancy](https://kb.innovatingautomation.asia/en/index/function-consultancy?hsLang=en) - [Commissioning](https://kb.innovatingautomation.asia/en/index/commissioning?hsLang=en) - [Default HubSpot Blog](https://blog.innovatingautomation.asia/blog) [![BALLUFF](https://kb.innovatingautomation.asia/hs-fs/hubfs/Balluff%20LOGO/Balluff_Logo.png?width=200&height=43&name=Balluff_Logo.png "BALLUFF")](http://www.balluff.com.cn) Balluff Automation Copyright © 2026, Balluff Automation (Shanghai) Co., Ltd.