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Based on a commercialized tensiometer, a dual-sensor was presented that it was able to simultaneously determine soil matric suction and volumetric water content, and therefore obtain soil water characteristic curve (SWCC) directly. Soil volumetric water content was measured by employing the metallic tube of the tensiometer as an antenna, whose radiating impedance varied as soil water content. Soil samples of three texture classes (sand, sandy-loam, and clay-loam) were tested and compared with the data from the sand box and pressure chamber methods. The results indicate that for all the three soils, the RMSE of the dual sensor was less than 0.05, the results of the dual-sensor agreed to that of classical method.