Confined spaces are not limited to any one industry and can be extremely dangerous for workers. This is because confined spaces are subject to depletion of oxygen (O₂) and build-up of toxic levels of carbon monoxide (CO), hydrogen sulfide (H₂S) and explosive levels of methane, due to microbial action, particularly when the space is wet. Confined spaces include ship holds, aircraft wing tanks, sewers and pipelines, storage tanks, excavation pits or any building space without adequate ventilation. Any worker entering a confined space must use a gas monitor to ensure it is safe from such gas hazards, which can be immediately dangerous to life.

mPower provides standard 4-gas CSE monitors equipped with sensors for O₂, CO, H₂S, and LEL (lower explosive limit for combustible gases). A man-down alarm provides real-time, remote wireless notification of a worker in distress.

Some confined spaces have additional, long-term health hazards due to the presence of volatile organic compounds (VOCs). Familiar substances that contain VOCs include fuels, solvents and pesticides. For such cases, mPower provides 5-gas monitors that include a photo-ionization detector (PID) for VOCs, in addition to the standard O₂, CO, H₂S, and LEL sensors.