This reflector is recommended for all robotic work performed with a survey pole. The rubber mountings on the top and bottom of the prisms provide protection of the glass if the pole falls over. The reflector is supplied in a padded case for safe transportation.
The GRZ4 has an overall pointing accuracy of 5mm (<1/4"). However, when aiming directly at one of the three prisms, indicated by yellow arrows, an accuracy of better than 2mm (<1/8") can be achieved.
Leica Part #: 639985
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Prism Dimensions | White Paper |