Optical Sensors - Photo Detectors - CdS CellsSensors and transducers are devices that are used to detect and measure various physical quantities, such as temperature, pressure, humidity, light, and motion. They are an essential part of many different types of electronic and mechanical systems, as they allow these systems to respond to changes in their environment.
Optical sensors are a type of sensor that is used to detect and measure light. These sensors can be divided into several different types, based on the physical principle that they use to detect light. One type of optical sensor is a photo detector, which is a device that converts light into an electrical signal. Photo detectors can be further divided into several different types, based on the material or technology that they use. One type of photo detector is a CdS cell, which is a device that uses a cadmium sulfide (CdS) crystal to detect light. CdS cells are commonly used in applications where it is important to detect small changes in the intensity of light, such as in automatic light dimmers and motion sensors.