Fabry-Perot Open Resonator for Liquids

Electronic Coolant

highly sensitive measurement of εʀ and tan δ in low-loss fluorinated liquids (e.g., Fluorinert FC-40).

Oil

broadband determination of complex permittivity for vegetable or lubricating oils.

εs ε ωε'

Dispersion

Reveal liquids hidden molecular dynamics by mapping how their dielectric constant and loss tangent change with frequency.

  • Frequency range:
15 – 50 GHz
  • Dielectric constant:
Dk = 1 – 15 (achievable accuracy < 0.5 %)
  • Loss tangent:
Df > 1 × 10-4 (achievable accuracy < 2 %)
  • Temperature:
room temperature
  • Fully automated, software-controlled measurement

3M Fluoroinert Electronic Liquid FC-40

ε' for FC-40 tan δ for FC-40
Fig. 3 FPOR-LIQ results for 3M Fluoroinert FC-40.

Engine Oil

ε' for Engine Oil tan δ for Engine Oil
Fig. 2 FPOR-LIQ measurements of engine oil versus dielectric/cavity-resonator results.

Canola Oil

ε' for Canola Oil tan δ for Canola Oil
Fig. 1 FPOR-LIQ measurements of canola oil versus dielectric/cavity-resonator results.

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