Tribrach Adapter with Optical Plummet Surveying, Tribrach with Optical Plummet Adjust Screw in Left Hand for Surveying

A tribrach is an attachment plate used to attach a surveying instrument, for example a theodolite, total station, GNSS antenna or target to a tripod. A tribrach allows the survey instrument to be repeatedly placed in the same position over a surveying marker point with sub-millimetre precision, by loosening and re-tightening a lock to adjust the instrument base in a horizontal plane. The device consists of two triangular metal plates connected at their corners by leveling thumbscrews, a bubble level, a locking mechanism and often an optical plummet. The centre of the bottom plate of the tribrach has a 5/8-11 UNC thread bolt hole which is used to attach the tribrach to the tripod. The top plate has three small holes or slots spaced 120˚ apart above leveling thumbscrews and a locking mechanism which enables a survey instrument or target to be accurately placed on the tribrach and locked in place.

• Tribrach Adapter W/Optical Plummet Surveying
• Tribrach With Optical Plummet Adjust Screw-in Left Hand forS-style ，T-style
• Used for theodolite, total station, GNSS antenna or target to a tripod
• Tribrach is an attachment plate used to attach a surveying instrument,
• High quality and accuracy Best choice for You