In line design mounts directly to McPherson slit bodies. This unit is designed for use with five (5) 1" diameter samples or filters. The wheel can be manually indexed into position while under vacuum. Positive detents and numbered readout provide accurate positioning and feedback as to which aperture is in line. When the Model 648 is purchased in combination with isolation valves, this filter assembly permits to easily and rapidly remove the filter or sample wheel portion - enabling exchange in one or all five locations - while the remainder of the system continues in vacuo. Designed for use in the 10-6 to 10-7 torr vacuum range.
If system requirements call for automation, the Model 648-1 should be specified. The 648-1 (not shown) features motorized filter changes and RS232 operation.