Leica says its GMX901plus “is an affordable and rugged GNSS receiver that delivers precise and reliable data about movements of sensitive structures” such as pit walls. “For time-critical applications that require high rate data and a higher accuracy the GMX901plus can be smoothly upgraded to a powerful L1/L2 GPS/GLONASS receiver with an update rate of 5 Hz. Designed with a focus on the essential with low power consumption, high quality measurement, simplicity, and durability, the Leica GMX901plus is an ideal sensor for monitoring structural movements. It has a robust housing that is water, heat, cold and vibration resistant that can be easily mounted on the infrastructure for long term monitoring.”The basic GMX901plus is a L1 GPS receiver for cost sensitive projects. For monitoring projects that require a higher accuracy and high-rate data, the GMX901plus can be smoothly upgraded to a powerful L1/L2 GPS/GLONASS receiver with an update rate of 5 Hz. With this upgrade users take advantage of high accurate data and positions for a detailed deformation analysis to take the right decision when movements become critical.The GMX901plus connects seamlessly to the Leica GNSS Spider advanced GNSS processing software for coordinate calculation and raw data storage. The Leica GeoMoS monitoring software can be used to provide integration with other sensors, analysis of movements and calculation of limit checks. Third party analysis software can also be easily integrated via the standard NMEA interface of Leica GNSS Spider (RINEX).