*** Note: This item is not returnable, non-refundable, and not exchangeable. All sales are final. 3M™ Organic Vapor Air Monitoring System uses a single charcoal sorbent wafer for easy collection of organic vapors and can be used for most applications. Monitor 3500 uses the proven scientific principle of diffusion, which is the gradual mixing of molecules of two or more substances. It shows an accuracy of /- 25% at a 95% confidence level for many workplace contaminants. Orange monitor has an 18 month shelf life. Features This monitor uses a single charcoal sorbent wafer for collecting vapors Accuracy of /- 25% at a 95% confidence level for many workplace contaminants 36" corridor width Single or dual corridor Electronics mounted remotely Variety of mounting options including direct mount, base plate or buried cable Meets ADA requirements Low frequency technology minimizes interference with electronic equipment Wireless RF transmitter and receiver Easily record and change message of your choice Unobtrusive and non-discriminating UL certified Applications Automotive Construction Food And beverage manufacturing Metal production & fabrication Military maintenance Repair and operation (MRO) Mining Oil And gas Pharmaceutical Transportation Product Attributes Product Type » Air Monitoring System Gas To Be Measured » Organic Vapor Brand Name » Scotch-Weld™ Gas » Organic Vapor