Sensors

Sensors in Star Trek

Sensors also referred to aboard starships as subspace sensors or sensor probes, was used to refer to any device that was used to scan, record, or otherwise observe any aspect of an environment surrounding a starship, space station, or person. 

Sensor Probe referred to a specific type of automated probe, used by Starfleet.

Sensor Lock required before being able to accurately target weapons as in “Locking phasers on target”