$17.78
Good choice for non-contact object detection; Detection distances up to 10 mm. This small digital distance sensor detects objects between 2 cm and 10 cm (0.8″ ...
Sharp GP2Y0D810Z0F Distance Sensor - 2cm to 10cm - RobotShop
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Rating
(4) · $10.95
Distance sensing range: 2cm to 10cm; Sampling rate: 390 Hz; Quick response time, small size, and low current draw; Easy to integrate into your project.