Jem'Hadar tricorder
A Jem'Hadar tricorder scanning for polaric particles, 2373
The Jem'Hadar tricorder was a tricorder used by the Jem'Hadar soldiers of the Dominion.
In 2372, Temo'Zuma and Arak'Taral used tricorders to search for Miles O'Brien on Bopak III after he escaped from them. (DS9: "Hippocratic Oath")
The following year, the Jem'Hadar who accompanied Weyoun to Deep Space 9 detected the polaric particles from Elias Giger's cellular regeneration and entertainment chamber with their tricorders. (DS9: "In the Cards")
These devices were not named on screen, but referred to as "tricorders" and "the Jem'Hadar equivalent of tricorders" in the script of "Hippocratic Oath." [1] They were referred to as "Dominion tricorders" in the script of "In the Cards". [2]
Concept art for "Jem'Hadar tricorders" by John Eaves, showing how the prop attached with velcro, was auctioned in 2014. [3]