PM 2.5 Sampler have USB based data transfer interface. They are included with a reviewed PC based application program that enables data presentation as well as data management. Offered are non-federal reference technique samplers, suited for the gathering of particulate substance that is 2.5m or less. PM 2.5 Samplers are suited for non-regulatory sampling as well as institutional studies. Inlet of these have stainless steel nozzles. They are used for determining the particulate matters concentration in the atmosphere. These are of microcontroller-based technology and are featured with programmable Real Time Clock. The samplers also enable data logging of numerous sample runs.