Please use this identifier to cite or link to this item: https://doi.org/10.21256/zhaw-4031
Publication type: Article in scientific journal
Type of review: Peer review (publication)
Title: Characterization of a new heat dissipation matric potential sensor
Authors: Jean Petit Matile, Luzius
Berger, Roman
Wächter, Daniel
Krebs, Rolf
DOI: 10.21256/zhaw-4031
10.3390/s130101137
Published in: Sensors
Volume(Issue): 13
Issue: 1
Pages: 1137
Pages to: 1145
Issue Date: 2013
Publisher / Ed. Institution: MDPI
ISSN: 1424-8220
1424-8239
Language: English
Subjects: Soil moisture; Matric potential; Sensor; Heat dissipation; Temperature; Irrigation control
Subject (DDC): 600: Technology
Abstract: Soil moisture sensors can help to reduce the amount of water needed for irrigation. In this paper we describe the PlantCare soil moisture sensor as a new type of heat dissipation sensor, its calibration and the correction for temperature changes. With the PlantCare sensor it is possible to measure the matric potential indirectly to monitor or control irrigation. This sensor is based on thermal properties of a synthetic felt. After a defined heating phase the cooling time to a threshold temperature is a function of the water content in the synthetic felt. The water content in this porous matrix is controlled by the matric potential in the surrounding soil. Calibration measurements have shown that the sensor is most sensitive to -400 hPa and allows lower sensitivity measurements to -800 hPa. The disturbing effect of the temperature change during the measurement on the cooling time can be corrected by a linear function and the differences among sensors are minimized by a two point calibration.
URI: https://digitalcollection.zhaw.ch/handle/11475/11889
Fulltext version: Published version
License (according to publishing contract): CC BY-NC-SA 3.0: Attribution - Non commercial - Share alike 3.0 Unported
Departement: Life Sciences and Facility Management
Organisational Unit: Institute of Natural Resource Sciences (IUNR)
Appears in collections:Publikationen Life Sciences und Facility Management

Files in This Item:
File Description SizeFormat 
sensors-13-01137.pdf702.29 kBAdobe PDFThumbnail
View/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.