We worked closely with a power company who specified a goal of +/-3" accuracy at 50' high. With a 17' stick and 5 targets (14' between top and bottom targets) our heights have checked out well.
Checkout our blog for more information about our height study.
We recommend the Crain/Seco SVR-17 (model #98021). If you already own a 25' SVR, the top 4 sections work just as well.
Any height sticks purchased from us come fully stickered with our calibration markers that have been precisely placed. Any questions about ordering equipment or our calibration stickers, contact us.