Scientific apparatus for measurement, monitoring, and analysis of metabolic or neurophysiological behavior and activity in humans, comprised of gas analyzers, gas flow rate monitors, gas flow generators, gas manifolds, and channel switchers for monitoring human gas intake and output, mass measurement, food and water mass measurement, and meters or controllers for regulated management of gas concentrations, gas flow, air flow, temperature management, relative humidity management, and access to food and water, namely, measuring use of air, food, and water intake and energy expenditure; scientific human monitoring apparatus, namely, sensors and monitors for collecting and analyzing behavioral data, namely, activity, exercise, position, and movement within small rooms, closets or metabolic chambers, all for use in scientific analysis of humans; computer software for calorimetry, data acquisition interface hardware and instruction manuals packaged therewith, all sold as a unit