Mediciones climáticas de humedad del aire en los trópicos, con termistores y la ecuación sicrométrica
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| Auteurs: | , |
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| Format: | artículo original |
| Date de publication: | 1997 |
| Description: | Electronic devices for air humidity measurements with hygroscopic capacitance sensors were tested for periods longer than a year under tropical conditions in Costa Rica. Some of the, showed a calibration drift that produced errors as high as 20% relative humidity after several months of use. To present a low-cost alternative for electronic air humidity measurements in the tropics, two thermistors were used as wet-dry bilb thermometers. Simultaneous measurements with an Assmann aspiro-psychrometer and the thermistors showed that five-minute average temperatures were within 0.2°C and relative humidities within 2%. Copper-constantan thermocouples yielded similar results. It was proved that thermistors are appropriate to be used year after year, as needed in climatological stations,, without replacement or recalibration. |
| Pays: | Kérwá |
| Institution: | Universidad de Costa Rica |
| Repositorio: | Kérwá |
| Langue: | Español |
| OAI Identifier: | oai:kerwa.ucr.ac.cr:10669/89815 |
| Accès en ligne: | https://hdl.handle.net/10669/89815 |
| Mots-clés: | Electronic devices Air humidity measurements Calibration drift Thermistors Tropical conditions |