The Fixed Gas Detector VT-60 operates on electrochemical and catalytic principles for the accurate detection of toxic and flammable gases. It is optimized to detect O₂, O₃, CO, CO₂, CH4, CL₂, CH₂O, HCL, H₂, H₂S, HCN, NO, NO₂, NOx, NH₃, N₂, SO₂, ETO, PH₃ and HF.