'''Scanners''' (or '''multi-scanners''', or '''Auspexes''') are [[Imperial]] short-ranged scanners, devices used to detect motion, invisible gases and energy emissions throughout a wide spectrum, such as heat, radiation and most forms of energy given off by vehicles and living troops. Scanners can take the form of separate hand-held devices, or they may be built into a helmet such as in the case of [[Terminator armour]]. Its Their main tactical use is to reveal otherwise hidden troops within a certain range and allow them to be fired on.The standard range of a scanner is fifty metres, although walls more than fifty meters thick as well as certain shielding materials are able to block them.¹

Scanners can take the form of separate hand-held devices, or they may be built into a helmet such as in the case of [[Terminator armour]]. The [[Imperial Guard]] uses scanners known as '''surveyors'''. [[Space Marine]]s and other forces use the '''auspex'''.