Метрологическое обеспечение жидкостных и аэрозольных счётчиков

Abstract

Operations for calibration and verification of liquid and aerosol particle counters are described. Typically, calibration of an aerosol particle counters is performed using latex spheres of known size. However, depending on the design of counters, light intensity, scattered by particles, is recorded at various angles. It is shown that registration of the scattered light at an angle of 90° that is inherent for most popular particle counters, leads, without a priori specified refractive index of the detected particles, to large measurement errors. Registration of the scattered light in the whole solid angle significantly reduces measurement error. Metrological characteristics of counters in their design were analyzed.