From site remediation monitoring to health effects studies to construction/demolition projects, the pDR-1500 provides the power and flexibility to provide both real-time results and gravimetric validation. At 41 oz., it's as easy to wear it on the belt as it is to run it in a fixed location. - See more at: http://www.thermoscientific.com/en/product/i-personal-i-dataram-pdr-1500-aerosol-monitor.html#sthash.N55k989B.dpuf