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

Table 1

Formula of solutions with different dielectric constants (DCs).

Parameter	Ethyl acetate	Isoamylol	n-Butanol	Isopropanol	Ethanol	Glycol	Ethanol : water (1 : 1)^1	Ethanol : water (1 : 2)	Water
DC	6.0	15.2	17.5	19.9	24.6	37.7	52.8	62.2	81.0

¹The ratio was calculated by volume.