PROBLEM TO BE SOLVED: To suppress occurrence of condensation in a measuring instrument installed in a cultivation chamber by a simple configuration.SOLUTION: A measurement unit (3) of the present invention comprises: an enclosure (31)； a detection part (32) which detects environmental elements of a cultivation chamber； a measurement part (33) which measures values of the environmental elements on the basis of a detection result of the detection part (32)； an introduction pipe (34) which introduces carbonic acid gas into the enclosure (31)； and a discharge pipe (35) which discharges carbonic acid gas filled into the enclosure (31) to the cultivation chamber.SELECTED DRAWING: Figure 1【課題】簡易な構成で栽培室に設置された計測器に結露が発生することを抑制する。【解決手段】本発明の計測ユニット（３）は、筐体（３１）と、栽培室の環境要素を検知する検知部（３２）と、検知部（３２）の検知結果に基づいて環境要素の値を計測する計測部（３３）と、筐体（３１）の内部へ炭酸ガスを導入する導入管（３４）と、筐体（３１）の内部に充填された炭酸ガスを栽培室へ排出する排出管（３５）とを備える。【選択図】図１
