The 3490-15 30mm Monitoring Prism Ball allows for tachymetric monitoring of buildings, structures, bridges, tunnels, railway tracks, etc.
Features:
• Automated target detection makes for easy monitoring
• Cost-effective solutions by using centering plates
• Forced centering gives very high consistent accuracy
Contains:
• Ball prism Ø 30 mm with glass triple prism Ø 17.5 mm
• Prism constant: K = -11.3 (Leica = +23.1) mm
• M6 internal thread in back, stainless steel, magnetic