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Metal‐oxide (MOx) are widely used in electrical/electrochemical sensors owing to their quick‐response ability, High surface‐to‐volume ratio, matching lateral‐dimensions with surface‐charge zone and modifiable with dopants significantly enhances their sensing performance. Typically, MOx‐based sensors are used in gaseous‐analytes for monitoring environmental‐pollutants and gas‐leakage. Tuning the properties of nanostructured‐metal‐oxides advanced their applications beyond environmental‐monitoring. This review focuses on the emerging‐dimensions of MOx‐based sensors in hazard‐surveillance and risk‐investigation like in deployment to detect fire‐hazards, chemical‐warfare agents, oil‐spills and explosives. Recent advances of using MOx‐based sensors as electronic‐tongue and electronic‐nose for non‐invasive health monitoring and MOx‐based sensor mobile robots for remote surveillance is also discussed.

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