RKI GX-3R
OSHA defines the breathing zone as a ten inch radius around the workers nose and mouth, and requires that worker exposure monitoring air samples be collected in the breathing zone. Air sampling filters may be attached to the collar or lapel.? Traditionally this means only a single gas monitor would be small enough for a worker to practically wear a gas monitor ?In the breathing zone?. Now there is a 4 gas monitor smaller than many single gas monitors.