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Cavity Resonators for Liquid

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:
 10 – 24 GHz
  • Dielectric constant:
 Dk = 1 – 20 (achievable accuracy: δDk < 0.5%)
  • Loss tangent:
 Df > 10-4 (achievable accuracy: δDf < 2%)
  • Temperature:
 -40 – +100 °C
  • 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 compared with dielectric/cavity‑resonator measurements.

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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