ZM6503 Fundamentals of humidity measurement Teaching Equipment Refrigeration Laboratory Equipment

Climatic chamber with adjustable humidity; comparison of four measuring methods

Features – different measuring methods for measuring humidity – climatic chamber with adjustable humidity and transparent door Learning objectives/experiments – measuring methods for air humidity measurement — psychrometric humidity measurement — hygrometric humidity measurement

— capacitive humidity measurement – characteristic variables to describe air humidity

– changes of the state of humid air in the h-x diagram – determination of the relative air humidity with

— psychrometer — hair hygrometer — hygrometer with synthetic fibre — capacitive humidity sensor

– design and operation of the instruments – comparison of the instruments

Specification [1] different measuring methods for measuring humidity [2] climatic chamber with adjustable humidity and transparent door [3] humidification via ultrasonic atomizer [4] dehumidification via Peltier cooling element [5] fan for air recirculation [6] 2 mechanical instruments: psychrometer, hair hygrometer

[7] 2 electronic instruments: capacitive sensor, hygrometer with synthetic fibre and combined temperature sensor