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.

• 摘要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。