The Spar 300 represents a comprehensive approach to surveying and mapping underground utilities. It is fully integrated with the Trimble Access surveying environment, operates seamlessly with Trimble GNSS receivers and Total Stations and is available from many Trimble dealers.
The Spar employs a set of magnetic field sensors to accurately measure the 3-D vector to an underground utility and automatically combines this vector with absolute positions obtained via GNSS or other survey methods to obtain the 3-D coordinates of the utility. The Spar’s novel approach allows it to measure the 3-D vector from any vantage point within range and its built-in acceleration and magnetic sensors allow it to operate in almost any position. Moreover, it offers two distinct operating modes, line and sonde, extending its capabilities to most surveying situations.
The measurement range of a single Spar 300 is approximately 10 ft. (3 m), but can be extended by adding a second Spar 300 to the system. The two Spars making up this Dual-Spar system can be separated by up to 10 ft. (3 m), significantly enhancing the Spar’s vectoring capabilities and extending the range to approximately 50 ft. (15 m). The Spars collaborate through a wireless interface, but require a cable interface for synchronization and are therefore expected to be mounted on a fixed structure such as a survey pole, cart, ATV or boat.