Non-contact measurement refers to techniques used to gather data about an object or environment without physically touching it. This method is often employed in various fields, including engineering, medicine, and environmental science, to assess parameters like distance, temperature, and surface characteristics. Common tools for non-contact measurement include laser rangefinders, infrared thermometers, and ultrasonic sensors. These devices utilize different principles, such as light or sound waves, to collect information, making them valuable for applications where contact could damage the object or affect the measurement accuracy.