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Pipe jacking, generally referred to in the smaller diameters as micro-tunnel, is a technique for installing underground pipelines and culverts. This method provides a flexible, structural, finished pipeline as the tunnel is excavated.
When pushing the specially designed pipes through the ground behind a shield, NT-02D offers an accurate control line of laser to avoid the deviation of center axis and elevation in a straight line.
NT-02D supports the external power supply for any full-days’ work, (24) which eliminates the need for recharging or carrying extra batteries.
| Angle Measurement | Measuring Method | Absolute Encoding |
| Diameter of Encoder Disk | 79mm | |
| Minimum Reading | 1″ | |
| Accuracy | 2″ | |
| Detection Method | Horizontal: Dual, Vertical: Dual | |
| Telescope | Image | Erect |
| Magnification | 26.5x | |
| Effective Aperture | 40mm | |
| Resolving Power | 3″ | |
| Field of View | 1°30′ | |
| Minimum Focus Range | 1.5m | |
| Multiple Constant | 100 | |
| Additive Constant | 0 | |
| Tube Length | 155mm | |
| Laser | Wavelength | 635±20nm |
| Laser Class | Class II | |
| Diameter | <4mm/1000m | |
| Tolerance | <10″ | |
| Compensator | Type | Single Axis |
| Working Range | ±3′ | |
| Accuracy | ±3″ | |
| Bubble | Plate Bubble | 30″/2mm |
| Circular Bubble | 8’/2mm | |
| Laser Plummet | Accuracy | ±1.5mm, at 1.5m |
| Diameter | ±2.5mm, at 1.5m | |
| Wavelength | 635±20nm | |
| Laser Class | Class II | |
| Display Unit | Type | 2.7 Inch LCD screen |
| Power Supply | Battery | 7.4V, Lithium battery, 8h |
| Working Environment | ||
| Range | -20℃~ +50℃ | |
| Dimension | Size | 165*160*340mm |
| Weight | 4.7kgs |
Note: all information above is subject to change without any prior notice.
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