Grove - Infrared Reflective Sensor v1.2 can be used for detection of proximity and color of objects. The reflective photosensor - RPR-220 used in this module consists of an infrared light emitting diode and a high –sensitivity phototransistor. Light-colored objects directly in front of the sensor will reflect more infrared light as well as generate more current in the phototransistor than an object with dark-colored surfaces, this can be tell from a built-in indicator LED which will turn red with sufficient flow of current. Also, the intensity of the reflective light increases as the object getting closer. You can adjust the potential-meter on the back of the board if you want to detect a specific object (eg. Black line) at a certain distance. This sensor is a widely used in applications such as line-following robots, rotary speed detection, auto-data logging on utility meters or other situations where color or distance contrast is sharp. Features * Easy to use * Panel-mounting Grove interface * Digital output: 0 or VCC * Built-in indicator LED * Threshold adjustable via potentiometer * Power supply: 3.5 – 5.5V DC * Reflective Photosensor: RPR-220 * Effective working distance: 4-15mm * Minimum detectable width for monochrome lines: 10mm * Connector: 4 pin Buckled Grove interface * Dimension: 20mm x 20mm * Product number: Seeed 101020174 Resources * Wiki Page https://elecena.pl/product/22716941/grove-infrared-reflective-sensor-v1-2 2023-03-07 https://elecena.pl/product/22716941/grove-infrared-reflective-sensor-v1-2 2023-12-27 https://elecena.pl/product/22716941/grove-infrared-reflective-sensor-v1-2 2024-09-19 https://elecena.pl/product/22716941/grove-infrared-reflective-sensor-v1-2 2024-11-29 https://elecena.pl/product/22716941/grove-infrared-reflective-sensor-v1-2 2024-11-30 https://elecena.pl/product/22716941/grove-infrared-reflective-sensor-v1-2 2025-09-30 https://elecena.pl/product/22716941/grove-infrared-reflective-sensor-v1-2 2025-11-28 https://elecena.pl/product/22716941/grove-infrared-reflective-sensor-v1-2 2025-11-29