Ambient light, IR (infrared), and UV (ultraviolet) sensors are types of optical sensors used to detect and measure light in different parts of the electromagnetic spectrum. Ambient light sensors measure the intensity of visible light in the environment, often used in display brightness control and automatic lighting systems. IR sensors detect infrared radiation, which is commonly utilized in proximity sensing, object detection, and remote control applications. UV sensors detect ultraviolet light and are essential for monitoring UV exposure, water purification, and germicidal applications. Generally, sensors with wider sensing ranges, higher sensitivity, and greater accuracy levels are priced higher. The choice between analog and digital output interfaces can also influence pricing, with digital sensors often being more expensive due to additional onboard processing capabilities. When purchasing these sensors, determine the spectral range and sensitivity required for your application, ensuring that the sensor can accurately detect the light wavelengths of interest.