The Gravi-Sert™ filter capsule is a self-contained filter “cassette capsule” that captures all particles collected by a filter cassette. It consists of a PVC filter membrane sealed to a static-dissipative PVC shell to create the capsule. This capsule is then weighed and inserted into a Zefon 2-Piece filter cassette with a support pad as a complete unit. After sampling the entire capsule is removed and weighed.
- Contains 100% of the sample collected within the capsule.
- Manufactured from weight-stable PVC materials.
- PVC shell is static-dissipative
- Meets NIOSH requirements for including "wall deposits" as part of the sample.
How it works
Air flows into the filter cassette through the inlet and continues into the Gravi-Sert™. Particulate is then contained within the Gravi-Sert™ while the airflow continues through the filter membrane and exits out the cassette outlet.
||5.0µm pore size, Polyvinyl chloride (PVC)
||~300 mg @ 50% RH
Gravi-Sert™ is suitable for use in methods that require gravimetric analysis including the following:
|Dust - Total
|Dust - Respirable
Additional Information Available
Accounting for Cassette Wall Deposits Gravimetrically - The Zefon Gravi-Sert Solution
NIOSH Manual of Analytical Methods - Consideration of Sampler Wall Deposits
NIOSH Manual of Analytical Methods, Chapter O
NIOSH and AIHA Developments on Including Closed Face Cassette Wall Deposits
NIOSH Guidelines for Aerosol Sampling Presentation
OSHA On Wiping the Interior Walls of 37-mm Closed-face Cassettes: an OSHA Perspective
Gravi-Sert™ is a trademark of Zefon International, Inc.