The MAS-1 4-20 milliamp sensor is the primary current-based sensor to use Decagon’s unique 70 MHz technology. This sensor provides a standard 4-20 milliamp output that is expected with PLCs and irrigation controllers. With the 4-20 mA interface, cable lengths exceeding 250 feet are possible.
Like alternative Decagon soil moisture sensors, the MAS-1 measures soil moisture precisely without the sensitivity to electrical conductivity and variation in soil types that have hindered previous cost efficient sensors.
The MAS-1 delivers lab grade accuracy at a price that makes large sensor networks economically viable. You can sufficiently fill your land with sensors at varying depths and locations, even if you’re on a restricting budget. And the MAS-1’s extended cable lengths give you yet more flexibility to put your sensors wherever you want.
The MAS-1 calculates volumetric water content (VWC ) by analysing the dielectric constant of the substrate using capacitance/frequency domain technology. The sensor utilises a 70 MHz frequency, which reducse salinity and textural influence, making the MAS-1 precise in most soil types and soil-less media. Factory calibrations are available for mineral soils, potting soils, and rockwool.
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