Handheld, portable data-collection devices allow the realtime monitoring of chemical reactions by students in teaching laboratories. These devices are primarily marketed for high school and college-level general chemistry experiments, but developing labs for organic chemistry would greatly expand their usefulness at the college level. Many organic chemistry laboratory experiments could employ this technology, one of which is described here.Hydrogenation of alkenes is an important reaction in the synthesis of organic molecules. There have been many reports in this Journal on the topic of catalytic hydrogenation experiments (1-23). Despite these reports, a hydrogenation experiment that meets the following criteria has yet to be developed for an undergraduate organic chemistry lab: