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Humboldt State University ® Department of Chemistry Robert A. Paselk Scientific Instrument Museum The Chemical Refractometer 1874 - 1970 Richard A. Paselk, Curator Refractometry has been a major tool in the chemical laboratory to determine concentrations of solutions and as an aid in identifying unknown substances since the late nineteenth century.

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Specification Image CMOS Sensor Controller High Speed DSP (Driver Free available) Snap Shot Software and Hardware Still Image Capture Frame Rate 30 f/s under 600 LUX Brightness Digital Zoom 5X Sequence Mode Brightness Control Manual adjustment Power Supply USB 2.0 Port ( 5V DC ) USB 2.0 &USB 1.1 Compatible OPERATION SYSTEM: WINDOWS XP, VISTA, WIN 7 32 BIT ONLY!!!!!!

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2MP USB Digital Pen Microscope Video webcam 500X Magnifier Camera Stand Andonstar Cam Functions and applications - The DIGITAL PEN CAMERA is a new electronic health product for the home.It is a tubular imaging system consisting of an optical lens, an image sensor, an illumination mechanism, and an image transfer control circuit connected to a computer.

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