Measurement of particles in liquid using reflected light

摘要

An improved cassette for detecting and quantifying particles in a liquid is provided. A sample volume of a liquid is held by a housing with an inlet and an outlet for the liquid. Light is emitted across the sample volume and reflected creating a doubled length of the optical path in the sample volume. The probability of detecting particles is increased and the measurement is improved. The housing reduces noise due to air bubbles and improves sensitivity of detection of particles in the liquid sample.