SH810 8" x 10" and - SH69 6" x 9" Filter Holder Assemblies, as well as additional SH4, 4" Diameter Filter Holder Assemblies are available. The larger SH69 and SH810 Filter Holder Assemblies are made of polished Stainless Steel with Dural adapter ring and filter frame. SH25 Filter Holder Assembly uses cartridge filters and is recommended for short term radioactive iodine grab sampling

All Filter Holders are interchangeable, which is an essential feature when tests require the use of several samples of the same or different type filters during critical tests in which the operator can use several loaded filter holders in order to avoid contamination

Flow Adjuster/ Brush Seater - Models FA-1 and FA-2 - To reduce flow rate from full flow rate to desired flow rate or to " seat" new motor brushes.

Calibration Kits - Models CKHV and CKHV810 - U.S. EPA prescribed method for accurate calibration of High Volume Air Samplers. U.S. EPA recommends that High Volume Air Samplers be re-calibrated at least once per year ( or when major components such as the motor or flowmeter are changed) . Model CKHV used with 4" diameter filter holder assembly. Model CKHV810 used with 4" or 8" x 10" filter holder assemblies.