Model 943 is a 3 position slit wheel specially designed to work with Model 133 fiber adapter. Each position can have different size slits dictated by your application. The 943 model also have 25.4mm insertable filter which gives wavelength preselection and stray light reduction.

Compact in-line design with 5" outer diameter fits neatly on slits of McPherson vacuum monochromators and spectrometers and uses very little space along optical path. Easy to read, external actuator to change filter in position while under vacuum. ¾" (19mm) diameter filters, 4 positions, vacuum compatible to 10^-6 torr.

Slim in-line design fits slits of McPherson monochromators and spectrometers and uses very little space along optical path. Easy to read, external actuator to change filter in position while under vacuum. 1" (25mm) diameter filters, 6 positions.
Also available as combination mount with Model 647 manual filter wheel AND a chopper mount accepting SRS540 (sold separately). Allows user to conveniently install filter wheel and chopper between light source(s) and entrance slit.

Easy access filters load from the top without removing elements along optical path. Fits on slits of McPherson vacuum monochromators and spectrometers and uses little space along optical path. Easy to read, external actuator to change filter in position while under vacuum. 1" (25mm) diameter filters, 5 positions, vacuum compatible to 10^-6 torr.

Motorized filter wheel otherwise much like the 648 described above. Easy access filters load from the top. Fits on slits of McPherson monochromators and spectrometers and uses little space along optical path. Easy to read, external indicator for filter in position. No manual controls. 1" (25mm) diameter filters, 5 positions. Vacuum compatible version works to 10^-6 torr. Requires Model 747 device controller for operation.

Metal seal flanges simplify adapting this filter wheel to your vacuum system. Filters load from the top without removing elements along optical path. Fits 6" outer diameter metal seal flanges. Easy to read, external actuator to change filter in position while under vacuum. 1" (25mm) diameter filters, 5 positions, vacuum compatible to 10^-6 torr.

Ultra high vacuum (UHV) filter wheel with all metal seals and capable of operation to 10^-10 torr. Metal seal flanges simplify adapting this filter wheel to your vacuum system. Filters load from the top metal seal flange and do not require you to remove elements along optical path. Fits 6" outer diameter metal seal flanges. Available vacuum tested, baked and RGA certified. Easy to read, external indicator for filter in position. Manually controlled. 25mm diameter filters, 4 positions.