The Topcon TP-L5G Green Beam Pipe Laser (SKU: TP-L5G, Part No. 329560121) is a professional-grade, self-leveling pipe laser engineered for underground utility installation, sewer and drain pipe laying, and precision grade work. Featuring a highly visible green beam laser diode, the TP-L5G delivers outstanding visibility in bright ambient conditions — making it a preferred choice over traditional red beam units when working in lit tunnels, open excavations, or shallow trenches. As an authorized Topcon dealer, Express Tools supplies the TP-L5G to civil contractors, plumbing crews, and utility installers who demand accuracy, durability, and reliability on every job.
Product Overview & Jobsite Applications
The TP-L5G is built around Topcon's proven pipe laser platform, combining automatic self-leveling with manual grade-set capability so crews can tackle flat runs or graded installations with equal confidence. Its compact, ruggedized housing is rated for the wet, muddy conditions found inside active trenches and pipe bores. The green beam technology increases dot visibility by up to four times compared to a comparable red beam, reducing misreads, rework, and costly grade errors. Whether you are laying a storm sewer main, installing a gravity drain, or setting culvert pipe in a road crossing, the TP-L5G keeps your alignment tight and your crew moving efficiently.
Key Specifications
- Laser Class: Class 3R Green Beam
- Wavelength: 532 nm (green)
- Self-Leveling Range: ±5° automatic
- Grade Range: 0% to ±10% (manual grade set)
- Grade Accuracy: ±0.05% (factory specified)
- Working Range: Up to 300 m (approx. 985 ft) with compatible detector
- Beam Diameter: <8 mm at 10 m
- Battery Life: Approx. 30 hours (alkaline D-cell batteries)
- IP Rating: IP67 — dust-tight and submersion-resistant
- Operating Temperature: -20°C to +50°C (-4°F to +122°F)
- Part Number: 329560121
Key Features
- Green Beam Visibility: Up to 4× more visible than red beam lasers in bright or partially lit environments
- Automatic Self-Leveling: Quickly compensates for minor setup disturbances, keeping the beam on grade
- Manual Grade Override: Set precise grades from 0% to ±10% for sloped drainage and utility runs
- IP67 Protection: Fully sealed against dust ingress and temporary submersion — built for trench conditions
- Long Battery Life: ~30 hours of runtime reduces battery changes on long shifts
- Compact & Lightweight Design: Fits easily inside standard pipe diameters for accurate interior placement
- Compatible with Topcon Detectors: Works with Topcon LS-80L and other compatible grade detectors for extended range
- Remote Control Ready: Optional remote control operation keeps operators out of the trench during adjustments
Job Applications
Sewer Main Installation: Set the TP-L5G inside the first pipe segment to establish a precise invert grade for gravity sewer mains. The green beam remains clearly visible to the rod person at the far end of the trench, minimizing miscommunication and grade errors on deep excavations.
Storm Drain & Culvert Work: For road culverts and storm sewer laterals requiring exact fall rates, dial in your required grade percentage and let the TP-L5G guide every pipe joint. The IP67 rating handles the standing water and mud typical of storm drain trenches.
Horizontal Directional Drilling (HDD) Exit Verification: After a bore is complete, use the TP-L5G to verify the as-built grade of the installed conduit or pipe before backfill, catching any deviation before it becomes an inspection failure.
Underground Utility Conduit: Electrical, telecom, and gas conduit installations requiring consistent grade control benefit from the TP-L5G's reliable self-leveling and extended range when paired with a compatible remote detector.
Compatible Accessories
Frequently Asked Questions
- What is the grade range of the Topcon TP-L5G?
- The TP-L5G supports a manual grade range of 0% to ±10%, making it suitable for the vast majority of gravity sewer, drain, and utility pipe installations that fall within standard municipal grade specifications.
- How far does the Topcon TP-L5G green beam reach?
- When used with a compatible Topcon laser detector such as the LS-80L, the TP-L5G has an effective working range of up to approximately 300 meters (985 feet), far exceeding the visible naked-eye range of the beam alone.
- Is the TP-L5G waterproof enough for trench use?
- Yes. The TP-L5G carries an IP67 rating, meaning it is fully protected against dust and can withstand temporary submersion in water up to 1 meter for 30 minutes. It is designed specifically for the wet, muddy conditions found inside active excavations and pipe trenches.
- Does the Topcon TP-L5G work with a remote control?
- The TP-L5G is compatible with the optional Topcon RC-400 remote control, which allows operators to adjust grade settings and control the unit from outside the trench — improving safety and efficiency during installation.
