A Gay-Lussac Pycnometer (Calibrated Class A) is a high-precision volumetric glassware item used to determine the density or specific gravity of liquids with exceptional accuracy. This type of pycnometer is named after Joseph Louis Gay-Lussac, and is distinguished by its fixed-volume design and calibrated ground glass stopper with a fine capillary hole that allows excess liquid to escape for exact volume measurement. Made from borosilicate glass and calibrated to Class A tolerances, Gay-Lussac pycnometers are ideal for analytical chemistry, quality control, and pharmaceutical testing, where traceable and repeatable density measurements are critical. Each pycnometer is individually calibrated at a reference temperature (typically 20°C) and may include serial numbers and certificates of calibration for regulatory compliance.
Technical Specification of Pycnometers(Gay Lussac Calibrated Class-A)
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Material:
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Borosilicate glass 3.3 (chemically and thermally resistant)
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Design:
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Cylindrical or pear-shaped body
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Narrow neck with a precision-ground glass stopper
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Stopper features a fine capillary bore to allow excess fluid egress
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Volume Range: Commonly available in 1 mL, 5 mL, 10 mL, 25 mL, 50 mL, and 100 mL
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Class: Calibrated to Class A standards (high accuracy)
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Calibration Temperature: Typically 20°C (can vary by region or custom spec)
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Graduation/Marking:
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Individually marked with exact volume
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Some include serial numbers and come with calibration certificates
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Stopper: Matching ground-glass stopper with overflow capillary
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