The GAS-MHV300E Series Air Sampling Systems are designed for remote unattended continuous air sampling applications. The GAS-MHV300E Series Air Samplers feature a brushless motor with electronic motor speed control that maintains a user selectable flow rate. The flow rate range attainable through the filter media is dependent upon the air porosity of the filter media. Flow rates as high as 176 CFM (300 m³/hr) are attainable with glass fiber filter media. The GAS-MHV300E Series design accommodates rapid field service and component replacement. The clam shell dual hemisphere inlet supports 46cm x 57cm filter media.