3MR3720 / 3720 MONITOR FORMALDEHYDE W/ANALYSIS 3M™ Air Monitoring Systems 3M air monitors meet or exceed OSHA accuracy requirements for many workplace contaminants. These easy-to-use monitors simply attach to the pocket or lapel of a worker's shirt, near the breathing zone. A 3M air monitor can also be used as an area monitor if there is sufficient air movement. See 3M technical data bulletins for more information. Some monitors include prepaid analysis.