Button heat-pulse sensor for soil water content measurements

  • Valente A
  • Soares S
  • Morais R
 et al. 
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Abstract

Recent developed button heat pulse probes (BHPP) demonstrated a great potential for soil water content measurements. This new probe compared to conventional heat pulse probes (HPP), does not use needles, and measurement accuracy is significantly improved. This new design, with the possibility to assembly the probe and electronics in the same package, with low-cost, and with less power consumption compared to conventional HPP, make it suitable to be connected to wireless data acquisition systems in precision agriculture. The probe was tested in agar to demonstrate the potential advantages of the button heat pulse sensor for soil water content measurements. It was possible to have an 0.5°C temperature rise with only 156 mW of power consumption, a ten times power reduction in heat-pulse soil water content measurements. These tests showed the potential use of the button heat pulse sensor for the determination of soil water content.

Author-supplied keywords

  • Button heat-pulse probe
  • Heat-pulse probe
  • Soil moisture sensor

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