image description

SPAR 300

Underground Utility Surveying

Request a Free Demo

fully integrated with the trimble enviroment

The Spar 300 family represent 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, may be used with Trimble Total Stations and is available from Precision Midwest

image description

underground utility

The Spar employs a set of magnetic field sensors to accurately measure the 3-D offset to an underground utility and automatically combines this offset 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 offset 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.

See Product Brochure

In a typical cable or pipe survey the Spar is mounted vertically on a survey pole directly below the GNSS receiver. The surveyor monitors the display continuously, using the on-screen indicators to maintain casual contact with the utility center line. Measurements may be collected automatically at fixed intervals or with single-shot measurements at selected locations. The pole may be equipped with a survey wheel for convenience. When the measurement range of the Spar needs to be extended, either because the utility is buried deeper than the 10 ft. (3 m) range of a single spar or because access to the centerline is restricted or difficult, two Spar 300 PPS units may be mounted together on a cart or a vehicle. The separation of the Spars determines how much the range is extended, for example, a 6 ft. (2 m) separation yields about 40 ft. (12 m) range.

use a dual spar system

A Dual-Spar system using the Spar 300 RL1G1 may be configured to measure the 3-D separation between the Spars automatically. This is done by configuring one of the Spars as a GNSS base station, along the other one to continuously monitor its relative position. The automatic baseline measurement increases the flexibility of the system significantly, since the Spars can now be moved with more ease, even continuously, allowing the surveyor to position them optimally.