How to measure high-viscosity samples with an optical particle counter?

For low-viscosity samples such as water which contain insoluble particles, they can be introduced directly to an optical particle counter without an auxiliary feeding system. For high-viscosity samples, a positive and negative pressure auxiliary feeding system is beneficial to sample introduction. For removing bubbles in highviscosity samples, a negative pressure mode is utilized. A positive pressure is required to introduce the samples to the measurement zone through a narrow path, resulting in stable and continuous sample flow despite the high viscosity.

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