Globe Glass™ graduated cylinders are calibrated to ASTM E1272 standards to measure precise volumes of liquids.  Globe Glass™ graduated cylinders are calibrated TD “To Deliver” and are available in sizes 5mL to 2000mL with Class A or Class B calibration tolerance options. 

Feature

• Borosilicate glass for low coefficient of thermal expansion provides exceptional resistance to thermal shock,
• A solid hexagonal base provides stability,
• Polyethylene (PE) bumper guard helps to protect against accidental breakage,
• Pour spout for easy liquid transfer,

• Beaded rim for strength and durability,
• High resistance to chemicals, 
• Dual scale metric graduations, 
• Durable white enamel printing.

Specifications

• Meet ASTM E1272 Style 1 Specification, 
• Calibrated TD – “To Deliver”,
• Class A calibration tolerance for highest accuracy and the most critical laboratory work, include a batch calibration report.
• Class B calibration tolerance for general laboratory work, 

• Chemical Composition – Low alkali borosilicate glass typically composed of 81% SiO2, 13% B2O3, and 4% Na2O.
• Optical Properties – Appears colorless and shows no noticeable absorption of light in the visible spectrum.
• Chemical Resistance
• Highly resistant to water, neutral and acid solutions, concentrated acids and their solutions, as well as bromine, chlorine, iodine, and organic matter, 
• Avoid use with hydrofluoric acid, very hot phosphoric acid, and alkaline solutions which will attack this glass.
• Thermal Properties:
• Coefficient of Linear Expansion: 32.5 x 10-7 cm/cm/°C
• Strain Point: 515°C
• Annealing Point: 565°C
• Softening Point: 820°C
• Specific Heat: 0.2
• Thermal Conductivity: 0.0027 Cal/cm3/°C/Sec.

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