- The HV-1 Series (single rotometer) and HV-2 Series (dual rotometer) are high volume air samplers. These models feature electronic flow regulation, a motor cooling fan within the motor housing, flow measurement and flow calibration capability. Many options are available upon request. Filter holder is optional.

 - The T8400 (120VAC) and the T8400E (220VAC) Series Air Samplers are high volume air samplers with a two stage, thermally protected electric motor driven vacuum blower and a 7-foot long electrical cord. A 4 inch (102 mm) filter is built into the unit. Optional flow gauges with LPM, CMM or CFM are available.
 

 - The DFHV-1 Series digital high volume air samplers provide simplicity of operation and improved accuracy. This model features a motor cooling fan within the motor housing, digital flow measurement, elapsed time and accumulated volume measurement capability. It has a bright LED display and a four button keypad.  Flow rates are corrected to a reference temperature and pressure. Filter holder is optional. Automatic flow control is a standard feature.

 - The DF-604 Series Air Sampling Systems are designed for remote unattended continuous air sampling applications. The DF-604 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. The DF-604 Series design accommodates rapid field service and component replacement. Flow rates are corrected to a reference temperature and pressure. Filter holder is included.

 - The DF-60810 Series Air Sampling Systems are designed for remote unattended continuous air sampling applications. The DF-60810 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. The DF-60810 Series design accommodates rapid field service and component replacement. Flow rates are corrected to a reference temperature and pressure. Filter holder is included. Optional data collection device is available.

 - The DF-804 Series Air Sampling Systems are designed for remote unattended continuous air sampling applications. The DF-804 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. The DF-804 Series design accommodates rapid field service and component replacement. Flow rates are corrected to a reference temperature and pressure. Filter holder is included. Various optional filter holders and data collection devices are available.