Where do you find sensor modules in Fallout New Vegas?

In Fallout: New Vegas, sensor modules can be found in various locations throughout the Mojave Wasteland. Notable places include the REPCONN Test Site, where they can be found among the debris, and the various components of robots you can dismantle. Additionally, they can be purchased from certain vendors like the Gun Runners or found in the inventory of some NPCs. Keep an eye out for them during scavenging runs, as they are also sometimes located in containers and lockers.