The Topcon DT-309LGLaser Digital Theodolite is designed for precise angle measurement, alignment, and construction layout. Featuring 9-second angular accuracy, a built-in laser pointer, and an easy-to-read digital display, it delivers reliable performance for everyday surveying and construction applications.
9-Second Angular Accuracy: Provides dependable horizontal and vertical angle measurements for construction layout and alignment.
Integrated Laser Pointer: Provides a visible reference for alignment and positioning tasks.
Digital Angle Display: Offers clear, easy-to-read measurements for efficient fieldwork.
30× Telescope Magnification: Provides clear target visibility for precise sighting.
Optical Plummet: Helps accurately position the instrument over survey points.
Fixed Tribrach: Provides a stable instrument setup.
Rugged Construction: IP66-rated protection against dust and water in demanding jobsite conditions.
Long Battery Life: Supports extended field operation with fewer interruptions.
clearance
Angular Accuracy: 9″
Telescope Magnification: 30×
Objective Aperture: 45 mm
Laser Pointer: Class 2 red laser
Laser Range: Up to 50 m (165 ft.) in daylight
Minimum Focus: 1.0 m
Display: Single-sided backlit LCD
Minimum Angle Display: 10″ / 20″ selectable
Plummet: Optical, 3× magnification
Tribrach: Fixed
Power Supply: 4 AA batteries; optional BDC71 rechargeable battery
Battery Runtime: Approximately 55 hours with theodolite and laser operating together
Environmental Rating: IP66
Operating Temperature: -20°C to 50°C (-4°F to 122°F)
Weight: Approximately 4.0 kg (8.8 lb.)
Topcon DT-309G Digital Theodolite
Hard Carrying Case
Plumb Bob
Tool Kit
Lens Cleaning Cloth
Protective Rain Cover
Precision Assurance
Topcon Calibration Services
Equipment is inspected and calibrated by certified technicians.
Ensure peak performance and accuracy with Topcon Calibration Services. Add this service to your laser purchase to guarantee your equipment is properly calibrated for optimal results. Professionally tested and adjusted, your laser will be ready to deliver precise measurements right out of the box.
Note: This calibration service is available only for online purchases and must be added at the time of equipment purchase.