The series MSS420 sensors, as with series MSS400 systems, with SP technology (inertial guidance) allow for the execution of excavation work at speeds never before seen, and this, with no loss of precision. Moreover, all its components have been strengthened, the connectors, casings, cabling, making it the most robust in the industry. Combined with a gyroscope, SP technology improves GNSS performance in hostile environments which sometimes causes the loss of satellite signals, such as wooded areas, urban canyons, mountainous terrain, etc. As compared to past generation sensors, series MSS400 systems are up to 20% more durable and need 30% less calibration time.