SandCam Views and Classifies Microscopic Sand Grains

Challenge Classification of grain size for civil engineering or geological survey was often determined by retrieval of a sample and performing a sieve analysis (or gradation test).  This method is slow and requires care in the selection of samples and their handling during testing. Dave Rubin asked InterTest to make a video-based device that would be suitable for submerged use in fresh and seawater at depths up to 200’.  The result is SandCam.  Development  The US Geological Survey has a patented method of classification that performs classification by visual method. [US 6,680,795; Henry Chezar and David Rubin, Underwater Microscope System]. With InterTest's expertise in video inspection systems, unique engineering abilities, and the help of David Rubin's extensive knowledge of geological surveys the SandCam was developed.  Solution SandCam is a high-resolution waterproof contact video microscope. Designed for 200' depth in seawater, the rugged Stainless Steel camera housing contai