To understand the price of photo sensors, it's necessary to look at its primary functions, and these are that they convert light into an electric signal. They are irreplaceable in each industry with their dependability and accuracy. Photo sensors have several types, such as photodiodes, photo transistors, photoresistors and others. The functions and strengths for each type to different degrees. From their technological features, photo sensors boast high sensitivity, fast responses, and can still work efficiently in a wide range of environmental conditions. Their value is reflected by what they do: automation tools for factories; security systems remote controls; medical equipment such as splastics; and even in consumer electronics which pass on the light sensor's detail via an inductor interface. They also act as a switch because we can use them to track whether or not there a foreign object has entered this area with no matter if it's on rainy days or nights past 8pm. The price of photo sensors can change with complex product design, sturdy material as well as technologies used in their production process.