The BORLETTI LPQ precision square frame spirit level is a metrological instrument designed for accurate control of perpendicularity, flatness, and geometric alignment on components and machine tools. Its square frame construction enables simultaneous verification along two orthogonal axes, making it ideal for checking squareness and machined surfaces requiring high dimensional accuracy.

The instrument operates through a high-sensitivity spirit vial, calibrated to detect minimal angular deviations expressed in mm/m. The available sensitivity range (from 0.02 to 0.10 mm/m) allows the level to be used both for high-precision inspections and general workshop applications. The reading is immediate and does not require any power supply, ensuring reliability in industrial environments.

The supporting surfaces, both flat and prismatic, are finely ground and inspected, ensuring stable positioning and uniform load distribution during measurement. This is essential to avoid measurement errors caused by misalignment or surface imperfections. The frame geometry is engineered to maintain structural rigidity and minimize deformation, ensuring long-term measurement stability.

A key feature is the thermal-insulated grip, which reduces heat transfer from the operator’s hand to the instrument body. This minimizes thermal expansion effects, improving repeatability especially in high-precision applications.

BORLETTI LPQ square levels are widely used in quality control, machine tool installation, and maintenance, as well as for checking bases, tables, guideways, and structural components. They are particularly suited for precision engineering, automotive, and machine building industries, where strict geometric tolerances must be maintained.

Compliance with DIN 877 ensures that the instrument meets internationally recognized standards for accuracy and reliability, making it a trusted solution for professional metrological applications.