The material below is Open Game Content from a 3PP Source
School abjuration; Level alchemist 3, inquisitor 3, ranger 4, sorcerer/wizard 3, summoner 3, witch-4wfg 3
Casting Time 1 standard action
Components V, S, M (diamond dust worth 50 gp)
Target creature or object touched
Duration 1 hour/level
Saving Throw Will negates (harmless, object); Spell Resistance yes (harmless, object)
The warded creature or object becomes difficult to detect by divination spells such as clairaudience/clairvoyance, locate object, and detect spells. Nondetection also prevents location by such magic items as crystal balls. If a divination is attempted against the warded creature or item, the caster of the divination must succeed on a caster level check (1d20 + caster level) against a DC of 11 + the caster level of the spellcaster who cast nondetection. If you cast nondetection on yourself or on an item currently in your possession, the DC is 15 + your caster level.
If cast on a creature, nondetection wards the creature's gear as well as the creature itself.