Detectable (adjective)

1. Capable of being discovered or found out.
2. Able to be perceived or noticed.

Origin:

From the verb "detect" meaning "to discover or find ou.t"

Examples:

1. The substance is detectable in small amounts.
2. His accent was barely detectable.
3. The changes in the data were not detectable to the naked eye.
4. The improvement was barely detectable but it was there.
5. The signal is too weak to be detectable.