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Analysis quality improvement

Case study:
Quality Improvement for a Liquid Composition Analysis Device
Liquid analyzer, Needle
Chemical Resistance



Introducing a case study where Kyocera improved the quality of a liquid composition analysis device by replacing the needle for liquid suction with Fine Ceramics.

ChallengeImprove Analysis Quality


(1) Conventionally used stainless steel needles made many small dents on the inner peripheral surface and causing liquid to remain in the dents. The residual liquid would mix with the following liquids to be analyzed, making it difficult to obtain correct analysis results.
(2) Stainless steel needles release metal components into the analyzed liquid, reducing the accuracy of analysis results.

SolutionFine Ceramics (Zirconia) with High Chemical Resistance and Surface Smoothness


Kyocera proposed changing the needle's material from conventional stainless steel to Fine Ceramics (zirconia) with high chemical resistance and surface smoothness.
* Depending on the type of liquid, even ceramics may have low chemical resistance.
*Values are representative values based on in-house measurements at the time of shipment.
Surface roughness of inner surface: Ra0.1 μm or less

ResultMore Accurate Analysis Results


By using Fine Ceramics (zirconia), which has an outstanding surface finish, the needle has a smooth surface on both the inner and outer diameters. As a result, it was possible to reduce the influence of residual liquid mixing during the analysis to follow. In addition, due to the improved chemical resistance, there is no elution of metal components from the needle, making it possible to obtain more accurate analysis results.

  • Structures in the pictures and animation have been simplified.
  • Material property can change depending on operating conditions.

View Material Characteristics

Chemical Resistance

More About Characteristics (to Fine Ceramics World)

More about Chemical Resistance