PROBLEM TO BE SOLVED: To provide a technique capable of grasping an amount of activity conveniently and intuitively.SOLUTION: An activity meter 1 comprises: an activity amount detection body 101 including a first liquid phase 10 containing an oxidation-reduction pigment and a solvent air 11 and an exterior body 20 that seals the activity amount detection body 101 and the air 11 and has a visual check area for visually checking the activity amount detection body 101 from an outside, and, by activity, the oxidation-reduction pigment and an oxygen gas react with each other and a color tone of the activity amount detection body 101 is changed.COPYRIGHT: (C)2015,JPO&INPIT【課題】簡便かつ直観的に活動量を把握できる技術を提供する。【解決手段】活動量計1は、酸化還元色素および溶媒を含む第一液相10を備える活動量検出体101と、空気11と、活動量検出体101および空気11を密閉し、活動量検出体101を外部から視認するための視認領域が設けられた外装体20と、を備え、活動により、酸化還元色素と酸素ガスとが反応し、活動量検出体101の色調が変化する。【選択図】図1
