- Weather Proof Aluminum Enclosure
- Completely Securable for Maintaining Chain of Custody
- Telescoping Inlet for Breathing-Zone Air Sampling
- Instantaneous N.I.S.T. Traceable Flow Reading
- Electronic, Resettable, Elapsed Timer
- Automatic Flow Control Valve
- Continuous Duty, Oilless Rotary Vane Vacuum Pump
- Flow Ranges from 0 to 7.0 CFM
- "High Efficiency" Omni directional particulate inlet head
Models: PSU-2, PSU-3, PSU-2-H, PSU-3-H, PSU-2-D, PSU-3-D, PSU-2-H-D, PSU-3-H-D, PSU-2-GN, PSU-3-GN, PSU-2-GN-R &WS, PSU-3-GN-R & WS, PSU-2-RHLB-RV, PSU-3-RHLB-RV