Where should I set the alarms on my toxic gas monitoring system?

Ultimately, the entire matter of where to set the instantaneous concentration alarm(s) is tied into what is expected by the regulatory agency. In the United States, for most workplace environments, it is the Occupational Health and Safety Administration (OSHA). OSHA has published Permissible Exposure Limits, or PEL’s, for many toxic substances. Three types of PEL’s…