Posts by Meng

使用MFIA测量自来水样本的电化学阻抗谱

on 05.07.2021 at 12:41 by Meng on Blog of Meng Li
电化学阻抗谱(EIS)是一种常用的无损检测材料物理化学性能的手段,被广泛的应用在各类的电化学器件,介电涂层,以及微流控芯片之中。本篇博文演示了如何使用MFIA阻抗分析仪测量自来水的电化学阻抗谱。

Evaluate Interdigitated Electrode Sensors with the MFIA

on 16.06.2021 at 15:45 by Meng on Blog of Meng Li
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 25.05.2021 at 14:06 by Meng on Blog of Meng Li
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 29.04.2021 at 10:22 by Meng on Blog of Meng Li
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 […]

Capturing transients with Zurich Instruments Toolkit: Programing your instruments was never that easy

on 07.04.2021 at 09:27 by Meng on Blog of Meng Li
In many applications, Zurich Instruments lock-in amplifiers and impedance analyzers are integrated into a larger measurement system. Having an application programable interface (API) to obtain necessary information from the instruments is of great importance in such cases. Thanks to the […]

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

on 23.03.2021 at 09:57 by Meng on Blog of Meng Li
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 07.01.2021 at 17:36 by Meng on Blog of Meng Li
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. […]

Function Generation Via Auxiliary Outputs on Your Instruments

on 26.11.2020 at 17:33 by Meng on Blog of Meng Li
Introduction Quite often one wants to generate an electrical waveform to assist his/her lock-in or impedance measurements. Such a function can be generated by a dedicated function generator, but ideally should be done in the same instrument, not only to […]

Measuring Dielectric Properties of Materials with Varying Thickness

on 30.09.2020 at 08:52 by Meng on Blog of Meng Li
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 […]

Multiplexed Impedance Measurements with the MFIA

on 17.06.2020 at 13:43 by Meng on Blog of Meng Li
Introduction Having more impedance measurement channels is often desirable in many applications. For instance, in electrical impedance tomography (EIT), it is common to have many channels to achieve enough spatial resolution (144 electrodes on the thorax) [1]. Naturally, this can […]

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

on 15.06.2020 at 15:31 by Meng on Blog of Meng Li
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 […]

5个优化您的阻抗测量的小技巧

on 11.05.2020 at 09:25 by Meng on Blog of Meng Li
阻抗测量可能有诸多不同的要求,但是最终共同的目标都一致,即获得最高的准度,精度和可重复性。本篇博文将指导您如何通过最佳的设置来提升您的阻抗测量结果。5个小技巧包括:1.确保仪器和待测器件之间的接线最佳; 2.使用用户补偿功能提升测量准度;3.选择正确的检测端子配置; 4.尽可能的使用自动输入量程模式; 5.优化平衡测量的速度和精度。

5-tips to Improve Your Impedance Measurement

on 02.04.2020 at 07:45 by Meng on Blog of Meng Li
Introduction Impedance applications often have different requirements, but the common goals are similar; get the best possible accuracy, precision, and repeatability. This blog post will guide you to the best measurement settings to improve your impedance measurements. It will help […]

Electrochemical Impedance Spectroscopy of Tap Water with the MFIA

on 06.01.2020 at 18:09 by Meng on Blog of Meng Li
Introduction Electrochemical impedance spectroscopy (EIS) is a popular non-destructive technique to characterize the physicochemical properties of materials, particularly at the solid-liquid (or electrode-electrolyte) interface. Despite the complexity of the measured data, EIS can be used to study many electrochemical devices […]

使用MFIA阻抗分析仪进行自动化二维阻抗扫描

on 24.09.2019 at 11:05 by Meng on Blog of Meng Li
很多器件和材料的阻抗都受到频率和其它参数(例如DC偏置电压)的影响。为了能够完整的表征这些样品,我们需要一种能在两个维度下进行参数扫描的阻抗分析仪。通过使用LabOne自带的任意5个API之一,我们可以轻易控制MFIA阻抗分析仪(或者MFLI锁相放大器和MF-IA升级选件)来进行这种全面参数分析。本文将详细说明如何使用简短的Python 3.7的程序,进行多参数维度的阻抗扫描。

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