A variety of hazardous chemicals are used during construction and due to worker mobility, portable gas detectors are considered an essential part of their personal protective equipment in the field.
- Excavation of land and support of buildings
- Surveillance of endangered and crowded spaces
- Excavation control
- Control of pipelines and sewage systems
- Flammable: Methane
- Toxic: Carbon monoxide and Hydrogen sulfide
- Oxygen: Oxygen deficiency