Ultrasonic tape measure being used to measure a wall. 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 | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / De Schwanberg, Victor |
Taille de l’image : | 6720 px × 4480 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |