Line Site GD28DX Automatic Level – 30X The Line Site GD28DX Automatic Level is a precision optical leveling instrument designed for accurate elevation measurement, site grading, and construction layout . Featuring a 30X magnification telescope and automatic compensator, it delivers consistent, reliable readings while minimizing setup time and operator error. Built for durability and ease of use, the GD28DX combines quality optics with a rugged, weather-resistant housing, making it well-suited for demanding jobsite conditions and daily field use. Key Features • 30X magnification – clear, detailed sighting • Accuracy: ±6 mm @ 30 m (1/4" @ 100 ft.) • Automatic compensator (±3′ range) for stable leveling • 45 mm objective aperture for improved visibility • 5/8"-11 tripod thread – standard compatibility • IP54-rated housing for jobsite durability Ideal For Construction layout, site grading, foundation work, and surveying applications requiring reliable optical leveling performance .