A Ramir, or Goa'uld weapon disabler, is a type of technology of Asgard design.
It appears as a circular piece of equipment that emits an energy field around itself that disrupts the flow of power between Naquadah and the technology it energises. As such, all forms of Goa'uld technology are incapable of functioning while a Ramir is present.(RPG: "Fantastic Frontiers: Stargate Season One")
On Cimmeria, an underground cavern where Thor's Hammer transported Goa'uld and their servants into was filled with Goa'uld weapon disabler which overlapped with one another to create a large bubble where Goa'uld technology was incapable of functioning. (SG1: "Thor's Hammer")