With help of Buro Blauw B.V., a PM2.5 reference measurement instrument has arrived in Arba Minch: a Leckel Low Volume Sampler (LVS).
The LVS is a NEN-12341 certified instrument for sampling PM2.5. It is the first of its kind in Ethiopia. With a constant flowrate of 2.3 m3/hour, it draws air through a filter. PM2.5 is captured by the filter. By weighing the filter weight before and after the measurement, the precise amount of PM2.5 in the sampled air volume is known. I can use this instrument to validate (and calibrate) PM2.5 low-cost sensor systems.