Fig.3:

weight: weight for pristine liquid metal weight and recycled liquid metal weight

Fig.4: 

sim11111:simulated S-parameters when all resonators are filled.
mea11111:measured S-parameters when all resonators are filled with pristine liquid metal.
mea11111r1:measured S-parameters when all resonators are filled with recycled liquid metal for the first recycling.
mea11111r2:measured S-parameters when all resonators are filled with recycled liquid metal for the second recycling.
mea10000:measured S-parameters when only first resonator is filled with recycled liquid metal.
mea01000:measured S-parameters when only second resonator is filled with recycled liquid metal.
mea00100:measured S-parameters when only third resonator is filled with recycled liquid metal.
mea00010:measured S-parameters when only forth resonator is filled with recycled liquid metal.
mea00001:measured S-parameters when only fifth resonator is filled with recycled liquid metal.
mea00101:measured S-parameters when third and fifth resonators are filled with recycled liquid metal.
mea11000:measured S-parameters when first and second resonators are filled with recycled liquid metal.
mea10011:measured S-parameters when first, forth and fifth resonators are filled with recycled liquid metal. 
mea11100:measured S-parameters when first, second and third resonators are filled with recycled liquid metal.
mea11110:measured S-parameters when first, second, third and forth resonators are filled with recycled liquid metal.
mea01111:measured S-parameters when second, third, forth and fifth resonators are filled with recycled liquid metal. 

Fig.5: 

simair: simulated S-parameters when first, second and third resonators are filled and when liquid sensor is empty.
simwater:simulated S-parameters when first, second and third resonators are filled and when liquid sensor is filled with water.
simIPA:simulated S-parameters when first, second and third resonators are filled and when liquid sensor is filled with IPA.
simmix: simulated S-parameters when first, second and third resonators are filled and when liquid sensor is filled with 50% IPA.
meaair:measured S-parameters when first, second and third resonators are filled and when liquid sensor is empty.
meawater: measured S-parameters when first, second and third resonators are filled and when liquid sensor is filled with water.
meaIPA: measured S-parameters when first, second and third resonators are filled and when liquid sensor is filled with IPA.
meamix: measured S-parameters when first, second and third resonators are filled and when liquid sensor is filled with 50% IPA.

Fig.6:
untouch: measured S-parameters when first, second and third resonators are filled without being touched.
touchf1: measured S-parameters when first, second and third resonators are filled and first resonator being touched.
touchf2: measured S-parameters when first, second and third resonators are filled and second resonator being touched.
touchf3: measured S-parameters when first, second and third resonators are filled and third resonator being touched.
touching: measured S21 at resonator frequency over time when different resonators are touched.