A sensor array is a device where a group of sensors are combined, for example, the forward sensor array on Galaxy-class starships. Subprocessors are part of a sensor array (TNG: "The Game")
The USS Enterprise used a duotronic sensor array. (DS9: "Trials and Tribble-ations")
In 2367, Commander William T. Riker suggested running a diagnostic on the USS Enterprise-D's forward sensor array when the presence of the two-dimensional lifeforms was first detected. (TNG: "The Loss")
Even an enhanced sensor array aboard the Enterprise-D wasn't able to locate the transformed Geordi La Forge on the surface of planet Tarchannen III. (TNG: "Identity Crisis")
When studying the Phoenix Cluster in early 2368, only one long-range array was available for fifteen science teams. The available bandwith was increased, however, by multiplexing the array. (TNG: "The Game")
When the Starfleet crew of Deep Space 9 was forced to hand over the station to the Alliance for Global Unity-controlled Bajoran Militia, they sabotaged the sensor array. (DS9: "The Siege")
In 2371 in the mirror universe, Jennifer Sisko was working on a transpectral sensor array that would allow the Alliance to easily locate Terran ships in the Badlands. (DS9: "Through the Looking Glass")
In early 2373, Chief Miles O'Brien was able to reroute data from a Jem'Hadar attack ship's sensor array to a tricorder. (DS9: "The Ship")
The Dominion constructed a massive sensor array in the Argolis Cluster in the early months of the Dominion War. It was powerful enough to detect starships at least five sectors away. In 2374, Jadzia Dax commanded the USS Defiant in a successful mission to destroy it. (DS9: "Behind the Lines")
In late 2375, a Romulan colony in the Unroth system began repairs on their long-range sensor array. This weakness was discovered by Thot Gor, who planned an attack. (DS9: "Strange Bedfellows")