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https://www.aptella.com/wp-content/uploads/2019/08/RC-5-TOPCON.webp600600Eliminate pole sway error and enable your robotic total station to track the prism at long range and ignore interference with Topcon's RC-5A. This handy little device is a must for engineering and construction survey work, as it trains the Topcon robotic instrument to only look for the prism it is attached to, eliminating interference on busy job sites. And, by mounting the RC-5A low to the ground on a pin pole kit, you can eliminate pole sway and associated errors for accurate set out of the design.