The 3M-3540 Organic Vapor Passive Monitoring Badge with Back-Up Section uses primary and back-up sorbent pads for sampling demanding environments. Especially suited for monitoring compounds like acrylonitrile, butadiene and methylene chloride for which activated carbon shows limited capacity.

All 3M™ Air Monitors are simple and effective devices that collect contaminants through the scientific principle of diffusion. They meet or exceed OSHA accuracy requirements of ±25% at 95% confidence level for many work contaminants.