Sciencetech dual detector housing allows two detectors to be used at any output port of a Sciencetech monochromator. The standard unit mounts a Sciencetech photomultiplier housing on one port and a semiconductor detector such as Si, Ge or InGaAs in the other port. The two output ports include a lens system to focus the output slit of the monochromator into the detectors. The HDT2-FM includes a flipping mirror controllable from the outside for detector selection. The HDT2-DM has a dichroic mirror to divide the output beam of the monochromator into two according to spectral range. Short wavelengths are transmitted through the mirror to one detector and long wavelengths are reflected towards the other. Dichroic mirrors with edges from 700nm to 1μm are available.