The Stonex STT402L is a high-precision optical theodolite built for advanced monitoring, engineering, and construction layout tasks. With a 2″ angular accuracy and dual-axis automatic compensator, it ensures reliable measurements across a wide range of terrains and jobsite conditions.
Its illuminated reticle, backlit dual LCD display, and ergonomic keypad allow surveyors to work comfortably in low-light environments such as tunnels or interiors. The absolute encoder preserves angle measurements even after power-off, while built-in features like vertical angle-to-percent conversion and horizontal angle locking make repetitive tasks faster and more accurate.
Designed for field productivity, the STT402L runs over 80 hours on a rechargeable Li-Ion battery or up to 24 hours using standard AA batteries—offering flexibility on long projects. This rugged IP55-rated theodolite is built to handle the elements while delivering precise, repeatable results.
