Technical Specifications Working Range: Up to 100 m Magnification: 26× Levelling Accuracy: ±1.6 mm at 30 m Deviation for 1 km Run Levelling: 1 mm Unit of Measure: 360° Tripod Thread: 5/8' Protection: IP54 Operating Temperature: −10°C to +50°C Weight: Approx. 1.5 kg Compensator: Self-levelling with transport lock Housing: Robust metal housing Bosch confirms the 26× magnification, 100 m working range, ±1.6 mm at 30 m accuracy, 5/8' tripod thread and IP54 protection. Description Optical Level Bosch GOL 26 D Professional is a robust surveying instrument designed for precise levelling and alignment over long distances. Its 26× magnification provides a clear and sharp view of the measuring staff, while the self-levelling compensator helps maintain accurate measurements. The sturdy metal housing and IP54 dust and splash protection make it suitable for demanding outdoor construction environments. Ideal for: Construction surveying, foundation levelling, site preparation, road work, drainage installation, landscaping and general outdoor levelling.