A unit 1 for producing pyrogen controlled water on a small to medium factory scale comprises a number of charged ultrafiltration units 10 arranged in parallel. The present invention provides a video camera monitor that includes a camera video input unit and a tally display controller. The peripheral device includes a special USB descriptor block. The marker may be preferably an electronic article surveillance marker. For injection molded parts such as the control panel, structural strength is enhanced by utilizing gas-assist injection molding to form structural ribs. The invention concerns such terms as outlier identification, filtering, spectral correction, and baseline subtraction steps that, when used together, provides for noninvasive measurement of biological parameters, such as glucose concentration.