A Novel Sensor for Noninvasive Detection of In Situ Stem Water Content Based on Standing Wave Ratio

Figure 3

Components of StWC sensor: (a) printed circuit board (width: 30 mm, height: 74 mm); (b) ring probe (width: 12.6 mm, thickness: 0.65 mm); (c) body case (width: 56 mm, height: 100 mm, and depth: 48 mm).

(a)

(b)

(c)