Pulp and paper testers include specialized sensors, instruments, COBB testers, and test equipment for evaluating the material properties and processability characteristics of pulp and paper. These properties and characteristics include consistency, freeness, contaminant analysis, densometry, porosity, smoothness, softness, fiber analysis, water absorption, wear or abrasion characteristics, and wettability. Pulp and paper testers often differ in terms of display type and special features. Devices and systems may come equipped with an analog meter, computer interface, digital readout, integral software, or video display.