Line level Bosch GLL 3-80 Professional 30 m range 0.3 mm/m accuracy

The Bosch GLL 3-80 Professional line level projects three 360° lines to provide full-room reference planes for horizontal and vertical levelling tasks. Designed for construction and renovation use, it delivers a levelling accuracy of ±0.3 mm/m and a self-levelling range of ±4° for fast alignment. The unit runs on AA batteries with an approximate runtime of 4 hours and supports a maximum direct range of 30 m without a receiver. Its compact, robust housing is rated to resist dust and splashes, and the device is intended for tasks that require simultaneous horizontal and vertical alignment across a room.

Advantages

The GLL 3-80 Professional provides continuous 360° line projection to reduce repositioning and speed up layout work. Self-levelling completes in a few seconds within a ±4° inclination range, maintaining the stated ±0.3 mm/m levelling accuracy for precise installations. High-intensity diodes improve line visibility in typical indoor work environments, while the AA battery operation enables quick battery swaps on site. The instrument's robust construction supports use in common construction conditions.

Suitable for

• Suspended ceiling installation
• Floor levelling and screed alignment
• Window and door framing
• Mounting shelves and cabinets
• Tile layout and alignment
• Drainage pipe and HVAC routing alignment

Key specifications

• Levelling accuracy: ±0.3 mm/m
• Self-levelling range: ±4°
• Projected lines: 3 × 360° (horizontal and vertical planes)
• Maximum range without receiver: 30 m
• Power source: AA batteries
• Battery runtime (typical): approx. 4 hours
• Ingress protection: dust and splash resistant (IP54)

How to use

Place the Bosch GLL 3-80 Professional on a stable surface or attach it to a tripod or wall mount at the approximate work height. Switch the device on and allow it to self-level; the instrument will automatically adjust within its ±4° range and indicate when levelling is complete. Use the projected 360° horizontal and vertical lines as reference planes for marking, aligning fixtures, or checking levels. For extended-range outdoor or long-distance alignment, pair the laser with a compatible receiver (sold separately) following the receiver manufacturer's instructions.

Usage recommendations

For best visibility of the laser lines in brighter conditions, reduce ambient light where possible or use an appropriate laser receiver. Replace batteries before long work cycles and store the device in its protective case to maintain IP54 resistance and prolong service life.