Round horizontal vial with a magnifying effect. The domed round horizontal vial with magnifying effect provides unsurpassed readability, also for inverted measurement. Highest accuracy (0.5 mm / m) due to ultrasonically-welded vials. Inverted measurement (0.5 mm / m). Strong walls and shock-absorbing rubber end-caps preserve high measuring accuracy.

Our Spirit Level glossary (PDF) provides a good comparison of the selected BMI Levels: The 690, 691, 692, 695, 698 and 699 and the 660, 661 and 665 models are listed here.

Spirit Level glossary (PDF)