Sensors & Scanners
Artificial sensors, of one kind or another, are designed to detect things which would not otherwise be visible to a human's natural senses. This can range from the complicated, such as electromagnetism or radiation, to the simple - e.g. something too far to see with the naked eye.
The effect this can have is obvious, it allows characters to act on information they wouldn't otherwise have - giving them new options, or making their existing options easier. A character with an appropriate scanner might be able to treat a complicated task as if their relevant training was one level higher, for example.
Most sensors are designed to be plugged into a computer system, but can also display the data directly to the user on built-in screens or by feeding it to the user’s suit display (if they have one).