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Wiktionary
microsensor

n. Any of several very small sensors that detect small amounts, or changes in a physical variable.

Usage examples of "microsensor".

More microsensors than you can wave a stick at, but no heavy shit for now.

But there are no surprises and the microsensors Intelligence primed the place with say it's clear .

Each was encoded with the biopulse of the owner, including identity, and microsensors, and miniature communicator—Starfleet jargon called these insignia the “minimiracles” of recent science.