VOLUMETRIC GAS SORPTION ANALYZERS, DYNAMIC FLOW GAS SORPTION ANALYZERS, DYNAMIC FLOW SINGLE-POINT ANALYZERS, SURFACE AREA AND PORE SIZE ANALYZERS, POROSIMETERS, FILLING APPARATUS FOR USE IN POROSIMETERS, DEGASSERS FOR USE IN CONNECTION WITH SURFACE AREA ANALYZERS, MEMORY CONTACT ANGLOMETERS, PARTICLE MICROMETERS, GAS FLOW CONTROLLERS, MULTIPLE SAMPLE MANIFOLDS FOR USE IN SURFACE AREA ANALYZERS, MATERIAL DENSITY METERS, AND POWDER SAMPLERS