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Plunger syringes designed for calibration of reservoirs and/or instruments. These devices consist of large-volume, accurate, calibrated syringes, typically including plastic (e.g., acrylic) barrels and plastic or aluminum plungers. Calibration syringes are used for the calibration of spirometers and pulmonary function physiologic analyzers; they are also used for air and gas sampling and to prepare gas mixtures.
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