Model HV-1EV.2 is a lightweight portable high volume air sampler. This model features manual flow regulation, a cooling fan in the electronics section of the enclosure and flow rate and volume reported at the ambient temperature and pressure conditions of the sample location. The vacuum blower is mounted in a rigid enclosure with non-skid rubber feet. An ergonomic LCD displays illustrates the pertinent air sampling data of the air sampling measurement such as elapsed time, ambient flow, totalized volume, and ambient temperature and pressure.