Design of an Arduino based digital psychrometric device

Creative Commons License

Kızıl Ü., Aksu S.

Mustafa Kemal Üniversitesi Tarım Bilimleri Degisi, vol.24, pp.1-8, 2019 (Peer-Reviewed Journal)


Those properties include temperature, relative humidity, humidity ratio, degree of saturation, specific volume and density, dew point temperature, wet-bulb temperature and enthalpy. The simplest way of obtaining data regarding to psychrometrics properties of moist air is to measure dry-bul temperature and relative humidity using simple thermometer and psychrometer. The remainder of the properties can be determined using either psychrometric chart or complex equations. A simple and cost-effective device is essential to gather long-term data to be used for automation devices or other engineering designs related to environmental control systems. An Arduino based psychrometrics devise developed to achieve this goal. The device employs Arduino  microcontroller card. This card has a cheap and high capacity microprocessor that can easily integrate different sensors. The device includes temperature/relative humidity sensor and a digital barometric sensor. The measured temperature/ relative humidity ​​and elevation are recorded by connecting to a remote database server over the Internet at the desired time intervals. All other pscyhrometrics properties are calculated within the database. The design procedure and performance of the device is discussed in this paper along with cost information.