What are devices that detect or measure a physical feature and transmit a signal called?

Devices that detect or measure a physical feature and transmit a signal are known as sensors. Sensors are critical components in various systems, particularly in the context of the Internet of Things (IoT) and industrial automation, as they gather data about environmental conditions, mechanical states, or other parameters. This information is then transmitted to other devices or systems for monitoring, analysis, and decision-making.

In the context of the options provided, sensors are specifically designed for the purpose of sensing and collecting information about physical phenomena, such as temperature, pressure, light, humidity, and motion. The ability to convert these physical properties into signals that can be processed by controllers or computers highlights the fundamental role of sensors in data collection and analysis.

Understanding the role of sensors is essential, as they enable real-time monitoring and responsiveness in Industrial 4.0 environments, making them integral to systems that rely on accurate data for operational effectiveness.