BTEX Monitoring Tube, 1/4" x 3.5", Inert Treated SS, Carbopack X 40/60, Conditioned, with Brass Compression Caps, Includes 1 Diffusive Sampling Cap, For Fenceline Monitoring, EPA Method 325, Minimum Order Quantity of 10

1/4" x 3.5" Inert Coated Stainless Steel ATD Tube, Conditioned with Brass Compression Caps and filled with Carbopack™ X 40/60 per EPA Method 325. 

Per method 325 A/B, each refinery should repack/replace the sorbent tubes or demonstrate tube performance following the requirements in Appendix A to this method at least yearly or every 50 uses, whichever occurs first.