Data-com probe
From Tardis Wiki, the free Doctor Who reference
A retractable data-com probe, capable of analysing all known substances, was part of K9's (PROSE: The Visual Dictionary [+]Loading...["The Visual Dictionary (2007 reference book)"]) eye-screen. (PROSE: Doctor Who and the Invisible Enemy [+]Loading...["Doctor Who and the Invisible Enemy (novelisation)"]) The K9 Mark 2 model following K9 Mark I's regeneration did not sport a visible probe on his eye-screen. (TV: Regeneration [+]Loading...["Regeneration (TV story)"])
K9 Mark III identified Krillitane oil with his probe when the Tenth Doctor smeared a sample onto it. (TV: School Reunion [+]Loading...["School Reunion (TV story)"])
