SOUTH NT-02D Pipe Jacking Theodolite

The SOUTH NT-02D is a specialized pipe jacking theodolite designed for underground pipeline installation, micro-tunneling and culvert construction. Its 1000 m long-range laser provides a visible control line for maintaining the designed direction during pipe jacking operations, while absolute encoding provides reliable horizontal and vertical angle measurement. With 2″ angular accuracy and a large LCD display, the NT-02D combines directional guidance with conventional theodolite measurement in one instrument.

Key Features

• 2″ angular accuracy

• 1000 m extreme long-range laser pointer

• Pinpoint laser accuracy of ≤4 cm at 1000 m

• Absolute encoder angle measurement

• 26.5× erect-image telescope

• 40 mm effective aperture

• Single-axis compensator

• 2.7″ LCD display

• External power supply support for extended projects

• Class II laser system

• IP-rated field instrument design

Long-Range Laser Guidance for Pipe Jacking

The NT-02D is built specifically around the requirements of pipe jacking and underground construction. Its long-range laser provides a visible reference line from the survey station toward the work area, helping operators maintain the designed centerline and direction as the pipe advances.

The instrument can be used in micro-tunneling, sewer construction, pipeline installation and culvert projects where a stable directional reference is required over a long distance.

Core Specifications

• Model: NT-02D

• Angular accuracy: 2″

• Reading system: Absolute encoding

• Minimum reading: 1″

• Telescope magnification: 26.5×

• Telescope image: Erect

• Effective aperture: 40 mm

• Resolving power: 3″

• Field of view: 1°30′

• Minimum focusing distance: 1.5 m

• Laser wavelength: 635 ±20 nm

• Laser class: Class II

• Laser range: Up to 1000 m

• Laser spot diameter: <4 cm at 1000 m

• Laser tolerance: <10″

• Compensator: Single-axis

• Compensator working range: ±3′

• Compensator accuracy: ±3″

• Display: 2.7″ LCD

• Power supply: 7.4 V lithium battery

• Battery operating time: Up to 8 hours

• External power supply: Supported

• Operating temperature: -20°C to +50°C

• Dimensions: 165 × 160 × 340 mm

• Weight: 4.7 kg

Applications

• Pipe jacking

• Micro-tunneling

• Sewer construction

• Underground pipeline installation

• Culvert construction

• Tunnel alignment

• Underground utility projects

• Construction surveying