Posts in Category EIS

Loudspeaker Impedance Measurements with the MFIA

on July 26, 2021 at 12:36 pm by Meng
Loudspeakers are electroacoustic transducers that convert electrical signals into acoustic ones. They are commonly seen and heard in our daily life. One of the most frequently used types, known as an electrodynamic loudspeaker, functions by the movement of a cone […]


on July 5, 2021 at 12:41 pm by Meng

Evaluate Interdigitated Electrode Sensors with the MFIA

on June 16, 2021 at 3:45 pm by Meng
In the previous blog posts, we demonstrated conductivity and permittivity measurements of liquids using an MFIA impedance analyzer. To reach the best accuracy, the measurements were carried out using immersion probes or dielectric fixtures with a precisely defined electrode area […]

Take Your Dielectric Measurements to the Liquid State

on May 25, 2021 at 2:06 pm by Meng
Liquid dielectrics are dielectric materials in a liquid state and are widely used in electrical insulation as well as cooling. Nonetheless, their fluidity also makes accurate dielectric measurements a challenge. In a previous blog post, we saw how to measure […]

Comparison of Liquid Conductivity Probes with the MFIA

on April 29, 2021 at 10:22 am by Meng
In the previous blog post, I have described how to use the MFIA impedance analyzer to measure the electrochemical impedance spectrum (EIS) of a liquid sample, and to derive the conductivity with EIS modeling. The post presented a 5-element equivalent […]

Webinar Summary with Q&A: Fast Electrical Impedance Spectroscopy for Characterization and Counting

on March 23, 2021 at 9:57 am by Meng
This blog summarizes the webinar that Fluigent and Zurich Instruments presented together our solution for fast electric impedance spectroscopy (EIS) in microfluidics. The system consisted of an HF2LI lock-in amplifier from Zurich Instruments and the LineUp series microfluidic flow controllers […]

Proximity sensors: inductive or capacitive? Using the MFIA to measure the sensitivity and response time of both sensing regimes

on January 7, 2021 at 5:36 pm by Meng
Introduction A proximity sensor is a sensor that detects nearby objects without physical contact [1]. They are commonly used, in applications ranging from production lines to modern mobile devices, mainly thanks to their non-contact configuration and the accompanying long lifetime. […]

Measuring Dielectric Properties of Materials with Varying Thickness

on September 30, 2020 at 8:52 am by Meng
Introduction A dielectric is traditionally defined as an electrical insulator, with very poor conductivity at DC [1]. However, because of its polarizability, charges can be stored in a dielectric material, typically in the format of dipoles, in the low and […]

Humidity Sensors: Resistive or Capacitive? The MFIA can tell the Answer.

on June 15, 2020 at 3:31 pm by Meng
Introduction Humidity sensors (also known as hygrometers) are commonly used in applications ranging from everyday sensing to lab research [1]. They are typically placed in an enclosed chamber, such as a car or a glovebox, where they are used to […]