Table 1.

Dielectric properties of typical sensing materials.

Material	Dielectric Constant	Loss Factor	Sensed Parameter
Kapton HN	3.15–3.4	0.0015–0.0035	Humidity [50]
Polyvinyl alcol	≈4 [51]	Variable 1	Humidity [50]
Carbon nanotubes	≈−6 [52]	Very variable 1	Ammonia [53,54]
			CO2 [55]
Paper	2.4–3.4	0.08–0.3	Humidity [56]
Silicon nanowires	2–12 [57]	Variable 1	Humidity [58]
Water	78	0.01–0.4	Oil [58]

¹ Depending on composition, conductivity and environment.