conductivity dielectric constant detector setup


UNS-Tech’s Conductivity + Dielectric constant (C+D)

detectors allow you to have the best of all worlds:

  • ultra-low detector volumes (2 μL) requiring correspondingly small sample volumes;
  • ultra-low low cell constants (< 0.1 /cm) providing exquisite sensitivity at low conductivities;
  • ultra-wide dynamic conductivity detection range (almost 7 orders of magnitude) for efficient calibration and operation;
  • dual channel operation for conductivity as well as now dielectric constant detection for characterization of both conducting and now insulating solutions as well;
  • compact design;
  • applications include ion chromatography, high performance liquid chromatography, stand alone bench-top and portable detection.



How it works:


In typical conductivity detectors, only conductivity is measured -- cell constants are usually too small in insulating solutions to enable measurements of dielectric constant.

By using proprietary technology, shown in Fig. 1, UNS-Tech has pushed the limits of current state-of-the art -- fashioning detectors with ultra-low cell constants that yield ultra-sensitive measurements of conductivity and now, novel measurements of dielectric constant as well.  UNS-Tech’s detectors also enable measurements using small sample volumes that are desirable for biological and chromatographic applications.

microchip in our conductivity dielectric constant detector

Fig. 1 A schematic illustration of UNS-Tech’s Conductivity + Dielectric constant (C+D) detector


The flexible detection system design enables process, portable and various bench-top applications, including to chromatography.  Fig. 2 shows a schematic of UNS-Tech’s Conductivity + Dielectric constant (C+D) detection system containing a detector, a peristaltic pump, and a laptop computer in a stand-alone configuration.  Various solutions are sampled by pumping the solution of interest from the sample reservoir to the conductance detector by the pump. For single shot measurements, the solution is ejected to a waste container, while for continuous/process measurements, the solution is returned to the original sample reservoir. A laptop connected to the detector via a USB cable acquires, displays and stores conductivity/dielectric measurements in real time. The USB connection also powers the detection electronics, enhancing portability.  For chromatography applications, the detector is connected to the waste line using standard compression fittings.”


diagram of our dielectric conductivity detector setup with computer

Fig. 2 A schematic illustration of UNS-Tech’s Conductivity + Dielectric constant (C+D) system operated as a stand-alone detection system