PRIMA100 light Weight Deflectometer (LWD) is measuring equipment with state-of-the-art technology.This portable and practical equipment is designed for on-site measurement of bearing capacity. and assure unbound layer quality. PRIMA100 measures the surface modulus and presents the results immediately allowing decisions to be made on site. Features include: direct mesuring of the E-modulus; no radioactive sources; can be supplied with GPS allowing storage of measuring positions and data in GIS databases. Four AA batteries supply power to electronics and display.