Reflective Optical Interrupters

Reflective optical interrupters, also known as reflective opto-interrupters or reflective opto-sensors, are a type of sensor that uses light to detect the presence or absence of an object. Reflective optical interrupters consist of an LED light source and a phototransistor detector, which are mounted on opposite sides of a gap or slot. When an object is placed in the gap or slot, the light from the LED is reflected off the object and onto the phototransistor, causing a change in the phototransistor's electrical current. This change in current is used to detect the presence or absence of the object. Reflective optical interrupters are commonly used in a variety of applications, such as detecting the position of a moving object, counting objects as they pass through a gap, or sensing the presence of an object in a specific location. They are available in different sizes and styles, depending on the specific requirements of the application. Reflective optical interrupters are often used in conjunction with other sensors, such as proximity sensors or photoelectric sensors, to provide a complete sensing solution.