These MKS Granville Phillips Convectron & capacitance diaphragm gauge cables work with the MKS Granville Phillips 307 vacuum gauge controller. These are a dual gauge cable, connecting the MKS Granville Phillips 307 controller to one 275 Convectron gauge and one capacitance diaphragm gauge. The MKS Granville Phillips 307 controller needs to have the correct Convectron & capacitance diaphragm card installed (cards also sold on this web site).