1、Photoelectric switch sensor is the use of the test object to blocked or reflected beam, by the synchronization loop gating circuit to detect the presence or absence of the object. 2、Specular reflection sensor switch, detection distance is 30cm. 3、Stable and reliable performance, quick response. 4、All objects can reflect light can be detected. 5、Widely used in object position control, automatic product counting, width discrimination, speed detection, automatic door sensing and more. Features: Photoelectric switch sensor is the use of the test object to blocked or reflected beam, by the synchronization loop gating circuit to detect the presence or absence of the object. All objects can reflect light can be detected. Specular reflection sensor switch, detection distance is 30cm. Stable and reliable performance, quick response. Widely used in object position control, automatic product counting, width discrimination, speed detection, automatic door sensing and more. Specification: Weight: Approx.209g/ 7.4oz Response frequency: 200Hz Response time: 30ms Rated current: 200mA Detection distance: 30cm/ 11.8in Package List: 1 * Photoelectric Sensor 1 * Accessary  kit Note: Please allow slight error due to manual measurement. Thanks for your understanding.