The Ziplevel precision altimeter replaces a rotary laser so one person working alone can set up in seconds to level and measure precision elevations directly in digits. It eliminates line-of-sight issues and measures with up to 0.050-in. precision more than 40 vertical ft. and a 200-ft.-diameter circle on a single setup. It covers unlimited ranges without tabulation or calculations. Ziplevel/Technidea Corp. 760-480-4740.