A Diode Sensor for Air Temperature and Humidity Profile Measurements

  • Josefina Argete

Abstract

An instrument package was developed for measuring four-level dry-bulb and wet-bulb temperature profiles. Germanium diodes (1N270) incorporated into a constant current circuit were used as sensing heads. Laboratory calibrations were referenced against a factory-calibrated thermistor with an accuracy of 0.25 deg C. The diodes showed a linear response over normal atmospheric temperature range and a sensitivity of about 1.8 mV /deg C. Field performance gave the following spread of values among the four psychrometers: 0.15 deg C for Td .05 deg C for Tw and 0.15 hPa for vapor pressure.

The diode psychrometers allow air temperature and humidity profile analyses over the earth-atmosphere interface wherein accuracy, flexibility in field use, and remote reading are required.
Published
2007-10-16
How to Cite
ARGETE, Josefina. A Diode Sensor for Air Temperature and Humidity Profile Measurements. Science Diliman: A Journal of Pure and Applied Sciences, [S.l.], v. 4, n. 2, oct. 2007. ISSN 2012-0818. Available at: <https://journals.upd.edu.ph/index.php/sciencediliman/article/view/331>. Date accessed: 06 aug. 2025.
Citation Formats
Issue
Vol 4 No 2 (1992)
Section
Articles
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