Northern Survey Supply
Wall Mount Prisms and Accessories
Still reaching for the BACK? Still hanging plumb bobs and string? surveying doesn't have to be that difficult. Wall Mount Prisms allow all surveyors to secure control points at a comfortable and accessible height while increasing accuracy and speed of use. All grade lines and azimuth are easily established using proven calculation techniques at a fraction the time reducing down time for your mining crews.
The New Era of “Tunnel Measuring” Mechanized mining techniques have created the need of navigating underground more efficiently with reduced overhead costs. Tunnels and drifts underground have increased in size to allow for today's large mechanized machinery making it more difficult for surveyors to reach up and position their control points in the back or (ceilings).
Using Wall Mount Prisms and utilizing common Coordinate Geometry techniques frees up the surveyor to place control where ever required at chest height. This simple but revolutionary idea allows surveyors the safety, speed and accuracy for marking up drifts for line, grade, tope and all other mining related surveying tasks.
Our Wall Mount Prism System consists of 3/8” stainless steel sleeves which are counter-sunk into the drift wall leaving nothing to be struck or bent. The prism adaptors are inserted into the sleeve and have a standard Leica prism mount that adapts to all Leica prisms. The adaptor shoulder rests on the sleeve providing excellent repeatability. The only thing left behind in the wall is the stainless steel sleeve.
Installation Procedure:
• Drill a 3/8” x 4” hole in the drift wall
• Slide the Stainless Steel Sleeve onto the Setter Tool (pounder)
• Friction fit the sleeve (slightly counter sunk)
• Insert the Stainless Steel Adaptor
• Attach the Leica Prism (see Figure 1 below)
Mini prism mounted in metal holder. Includes a circular bubble, removable target plate, spike and padded bag. Prism constant of +17.5mm, max. IR range of 2000m (7000ft).
50 sleeves per bundle. Priced per bundle. Order # 08-402. Price CAD $175.00
Order # 08-400. Price CAD $12.00.