Miniaturized silent sub-noise rangefinder module, developed together with IOE WAT, is characterized by high operating speed, working range of approx. 3000m, accuracy of 1m. Due to use of a low divergence beam of 0.75 x 0.5 mrad, it measures the distance to small objects. Thanks to its small dimensions and low weight, the device is very easy to be integrated with other systems. The developed solution has many practical applications in security systems, in the field of automation, robotics and automatic measuring systems.