The URG-3000N is designed to sample for organic and elemental carbon found in ambient PM-2.5. The measurement of ambient carbon species is an important part of the United States national PM-2.5µm Chemical Speciation Network (CSN). The URG-3000N has been designed for the USEPA to achieve comparable data with the carbon measurements of the Interagency Monitoring of Protected Visual Environments (IMPROVE) PM-2.5 carbon module. Below are the components of the URG-3000N Carbon Sampler. Click on each component for parts list and instructional documents to guide you in the maintenance of your URG-3000N.