A photoelectric sensor can be either analog or digital, depending on how it outputs the detection signal. Most standard Omron photo sensors are digital, meaning they provide a simple ON/OFF output signal. When the sensor’s light beam is interrupted or reflected by an object, it changes its output state from OFF to ON (or vice versa). This type of sensor is used for tasks like object presence detection, counting, or position verification — applications where you only need to know whether an object is there or not.
However, analog photoelectric sensors are designed for applications that require precise measurement of distance or position. Instead of an ON/OFF output, they produce a continuous signal (voltage or current) that changes according to the target’s distance or reflectivity. Some advanced Omron photoelectric sensors include analog output versions for distance measurement or level detection. These are ideal when you need smooth feedback or proportional control in automation systems.
In simple terms, most Omron photoelectric sensors are digital for detection purposes, while analog models are used for measurement or control where variable output is needed.