VICTOR DE SCHWANBERG / SCIENCE PHOTO LIBRARY VICTOR DE SCHWANBERG / SCIENCE PHOTO LIBRARY
Ultrasonic tape measure. This device sends and recieves ultrasound. When pointed at a surface or object the returning signal is used to calculate its distance from the device. It has a laser pointer to help target the device. In this picture the laser beam has been digitally enhanced.
Model release not required. Property release not required.