Optical motion sensors are devices used to detect motion by capturing changes in light patterns. These sensors typically utilize infrared or visible light to detect motion within their field of view. They work on the principle of detecting changes in light intensity or pattern caused by moving objects. Basic optical motion sensors suitable for simple applications like motion-activated lighting can range from $5 to $20. More advanced sensors with higher accuracy and additional features, such as adjustable sensitivity and range, may cost between $20 to $100 or more. Industrial-grade optical motion sensors designed for specialized applications can be priced higher, ranging from $100 to several hundred dollars. When purchasing optical motion sensors, several factors should be considered to ensure they meet the requirements of the intended application: Detection Range and Angle, Sensitivity, Environmental Conditions, Power Requirements, Additional Features.