Particle flux detector
A particle flux detector was a piece of advanced sensor technology aboard NASA's Mariner 2 space probe when it was launched in the mid-20th century.

A schematic of the Mariner 2 spacecraft depicting the location of the particle flux detector was stored in the 's library computer database. This database was accessed by the Talosians in 2254. ()

See also
Particle flux

Sensor technology (retconned)