Sensopart has just recently released the smallest optical distance sensor in the world. The FT-10 RLA is 21.1 x 14.6 x 8 mm in size and only 10 grams in weight, just barely larger than the size of a fingertip. This makes them ideal for cramped conditions. The measuring range for the sensor is 10-70mm, and they have excellent sensor characteristics with repeat accuracy and linearity. 

The FT-10 RLA is in laser class 1, which is optimum for eye safety. They are ideally suited for challenging measurement tasks including the assembly of semiconductor devices or in robotics applications.