Expansion of the Particle Number & Concentration Network: Particle size and number instruments (Scanning Mobility Particle Sizer)

There are 4 objectives of this contract:<br/><br/>1. Increased Geographical spread of sites (Likely on focus on coastal locations, clean rural locations and rural locations with high agriculture)<br/><br/>2. Finer resolution fixed point monitoring needed (e.g. different microenvironments)<br/><br/>3. Increase Particle Size Distribution measurements and more co-located measurements. Targeted PM size monitoring, over appropriate spatial scales and durations is required. (Likely to focus on colocation with Black Carbon and PM Speciation measurements)<br/><br/>4. Increase in Ultrafine Particle Total number concentration measurements.