A practical dew point hygrometer for teaching use was introduced, which has low price and good teaching effect.Meanwhile,it enormously enrich the content of thermodynamics in the physics experiment.

• 介绍了一种实用型教学用露点仪,其价格便宜,直观性强,在教学中取得了良好的效果,同时也极大的丰富了大学物理实验中的热力学内容。