This mount is required to mate Sciencetech PMH Series PMT detectors to the output port of Sciencetech monochromators. It can be mounted to any Sciencetech monochromator models although the Model 9030 scanning monochromator requires a special version. This mount has a two side screw quick release mechanism to disconnect the PMT Detector from the monochromator. The PMT can be remounted without performing a realignment procedure. Please note that an output slit is required with this option (except for 9010 monochromator which already has an output slit), but the focal plane gap extension option is not required.