Complex Permittivity – Dielectric Spectroscopy

Our TDR systems provide a fast and non-destructive way to measure the dielectric permittivity of materials using an open-ended coaxial line. Users can quickly characterize materials with high precision—ideal for lab, industrial, or quality control environments.

Open-ended coaxial line sensor for measuring permittivity. Open-ended coaxial line sensor for measuring permittivity.
High-frequency SDM-10G coaxial probe for precise RF permittivity measurements. High-frequency SDM-10G coaxial probe for precise RF permittivity measurements.
SDM-10G permittivity probe after water immersion — built for precision and durability. SDM-10G permittivity probe after water immersion — built for precision and durability.
SeunisPro measurement of complex permittivity in ethanol and NaCl solution. SeunisPro measurement of complex permittivity in ethanol and NaCl solution.
Overview of SeunisPro permittivity measurements. Overview of SeunisPro permittivity measurements.
Sequid Permittivity Software — combine our algorithms with your trusted VNA equipment. Sequid Permittivity Software — combine our algorithms with your trusted VNA equipment.

What materials can be measured with our system?

  • Liquids, gels
  • Pasty materials
  • Soft materials
  • Materials with soft surface

How does it work?

  • TDR measurements with open-ended coaxial line (e.g. Sequid SDM-10G)
  • Calibration with known material (air, short-circuit, distilled water)
  • Optionally 4th calibration medium (saline solution)
  • Recognized and established calculation methods of permittivity
  • Fully integrated into Seunis software
  • Single-ended TDR measurements with STDR-65 or DTDR-65