The impedance of the hydrogen fluorides KHF₂, NH₄HF₂ and BaHF₃ was investigated as a function of temperature and in the presence of HF and H₂O. A comparison of results on different electrode materials (graphite, silver, palladium, Sn|SnF₂, and Sn|SnF₂|LaF₃) was used to elucidate the contribution of fluoride ions and protons to the net charge transport. All three investigated materials exhibited a considerable and nearly reversible increase of conductivity in the presence of gases that act as proton donors. In the case of BaHF₃, the results indicate both the mobility of fluoride ions (E_A=0.54 eV) as well as a net mobility of protons. The latter is explained by proton exchange due to internal acid-base reactions of the protonated anions. At ambient temperature, KHF₂ only becomes conducting when exposed to HF or H₂O. NH₄HF₂, on the other hand, shows a higher conductivity than BaHF₃ already in dry atmosphere increasing less with humidity than the other two materials. This indicates an intrinsic proton mobility in NH₄HF₂.