METER Environment

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When considering which soil water content sensor will work best for any application, it’s easy to overlook the obvious question: what is being measured? Time domain reflectometry (TDR) vs. capacitance is the right question for a researcher who is looking at the dielectric permittivity across a wide measurement frequency spectrum (called dielectric spectroscopy).

Many people assume the soil is dry when it feels dry to the touch. This false assumption can lead to poor decisions such as storing steel drums of toxic waste in a desert soil. The following calculations illustrate why steel drums would corrode in any soil, even if that soil that feels dry.


List of questions and answers relating to HYPROP.