Naslov
Ammonia concentration monitoring using Arduino

Autori
Petric, Marko ; Dodigović, Filip ; Topić, Mateo ; Radetić, Lucija ; Mrakužić, Petar ; Grčić, Ivana

Izvornik
Environmental engineering = Inženjerstvo okoliša (1849-4714) 6 (2019), 1; 21-26

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
MQ-137 sensor ; Arduino ; ammonia concentration ; photocatalyst

Sažetak
In order to evaluate the efficacy of ammonia photocatalysis, it is necessary to continuously monitor its concentration during the process. This paper presents ammonia concentration monitoring using a low cost (non- professional) electronic device. The device is based on an open source electronic platform, and it is composed of the MQ- 137 ammonia detection sensor, connected to the Croduino Basic 2 board. Sensitive material of the sensor is a metal oxide (SnO2). The change in the ammonia concentration causes a change in the electrical resistance, which is measured and used for the ammonia concentration estimation. Four measurements, with ammonia concentration ranging from 0-500 ppm were performed in the controlled environment. With the purpose of the device calibration and repeatability test, along with a low-cost device, the monitoring was carried out also with a professional device, Geotech GA5000 gas analyser. Using the information provided in the sensor datasheet, together with the measured data, the measurement error of the low-cost device was assessed. After calibration, ammonia concentrations measured using a low-cost device, are consistent with those obtained from the professional device.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo, Interdisciplinarne tehničke znanosti

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