What is a micro capillary?

Micro Capillary

Micro capillaries are extremely fine, narrow tubes manufactured from materials such as glass or plastic. These tubes have internal diameters that can range from a few micrometers to several hundred micrometers, allowing for the precise control and manipulation of small volumes of fluids. Micro capillaries are pivotal in various scientific and medical applications, including microfluidics, capillary electrophoresis, and the delivery of substances at a microscale.


  • Microfluidics: Micro capillaries are essential components in microfluidic devices, where they enable the manipulation of fluids at the microscale. These applications are crucial in fields such as chemistry, biology, and medicine.
  • Capillary Electrophoresis: In capillary electrophoresis, micro capillaries are used to separate ionic species based on their charge and size. This technique is widely used in biochemical and forensic analysis.
  • Medical and Biological Research: In medical and biological research, micro capillaries facilitate the precise delivery and withdrawal of fluids from biological samples, aiding in various experimental setups.


Micro capillaries are manufactured using specialized techniques that allow for the production of tubes with precise internal diameters and smooth internal surfaces. These techniques include drawing down glass or plastic to the desired diameter under controlled conditions. The quality of a micro capillary, such as its uniformity and surface smoothness, is critical for its performance in specific applications.


  • Precision: Allows for the precise control and manipulation of small volumes of fluid.
  • Versatility: Can be used in a wide range of applications from scientific research to medical diagnostics.
  • Efficiency: Enables efficient separation and analysis of substances at a microscale.

In conclusion, micro capillaries are indispensable tools in the fields of science and medicine, offering precision, versatility, and efficiency in the manipulation and analysis of small volumes of fluids. Their role in advancing research and diagnostics continues to grow as technologies evolve.

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