- Earth Systems Solutions - Soil moisture monitoring and sampling instruments for soil science, agricultural, irrigation, and environmental applications.
- Campbell Scientific, Inc. - Soil-water instrumentation. Applications include monitoring soil water content, matric potential, and soil heat flux.
- Kel Instruments Co. Inc. - Specializing in soil pH and salinity test instruments.
- Soilmoisture Equipment Corp. - Manufacturer of instruments to measure and extract soil moisture. Products include tensiometers; extractors, compressors and manifolds; plant water status console; salinity sensing equipment; soil permeability equipment; samplers; and related instrume
- Aquaflex - Vendor information about a sensor that measures both soil moisture and soil temperature over a large volume of soil.
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