Graduated Measuring Cylinder

What is the Graduated Measuring Cylinder?

A graduated measuring cylinder gives approximate volume readings across a range with a stable, narrow base. It is used for routine measuring where a single calibrated volume is not required, with a stable base for routine use.

Overview

The cylinder is a borosilicate 3.3 tube with a hexagonal or round base, a spout, and graduations in millilitres or fractions. Class A cylinders meet ISO 4788 tolerances and can carry a certificate, while Class B cylinders suit general work. Capacities range from 5 mL to 2000 mL, with the smallest graduation typically one tenth or one fiftieth of the capacity. Reading is taken at the bottom of the meniscus with the eye level, and a white or blue backing improves contrast. Cylinders are used to measure approximate volumes of water, buffer and reagent where a Class A flask or pipette would be unnecessarily precise. Because they are tall, care is needed to avoid toppling, and they should not be used for accurate volumetric work or for hot liquids.

How does it work?

Laboratory glassware works because borosilicate 3.3 is chemically inert, transparent and resistant to heat and thermal shock. Its low coefficient of expansion, about 3.3 × 10⁻⁶ per kelvin, means it tolerates rapid temperature change without cracking, and it resists attack by most acids, solvents and reagents, so it does not contaminate samples or react with them. Volumetric glassware carries a calibration mark and is made to defined tolerances: Class A flasks and pipettes hold or deliver a stated volume at 20 °C within a tight limit, while Class B allows a wider tolerance for less critical work. Graduations on cylinders and beakers are approximate. Ground joints and stoppers seal by friction, and standard tapers allow interchange. Because glass is brittle, care is needed with impact and with hydrofluoric acid and hot alkalis, which attack it.

What are the key features?

• Hexagonal or round base for stability
• Graduated in mL with spout
• Class A to ISO 4788 or Class B
• Capacities 5–2000 mL
• Smallest division one tenth to one fiftieth
• White or blue backing for contrast

What are the technical specifications?

A typical graduated measuring cylinder configuration offers class of Class A or B, material of Borosilicate 3.3, capacity range of 5–2000 mL, graduation of 1/10 to 1/50 of capacity, base of Hexagonal or round and spout of Yes. Values are indicative of the product class; the exact figures for each configuration are confirmed on the quotation and the calibration documents supplied with the instrument.

Which applications is it used for?

The Graduated Measuring Cylinder is used in approximate volume measurement, buffer and reagent preparation, rinsing and washing steps and general laboratory work. Across the wider Glassware class, laboratories also deploy it for standard and reagent preparation, titration and volumetric analysis and sample mixing and heating.

Which standards and certifications apply?

Relevant standards and methods include ISO 3585 (borosilicate glass 3.3), ISO 1042 (one-mark volumetric flasks), ISO 385 (burettes), ISO 4788 (graduated measuring cylinders), ASTM E438 (glass composition) and USP <660> (glass containers). Certification candidates for this model are CE and ISO 9001 manufacturing; each is to be confirmed for the specific configuration before shipment, and certificates are supplied only where they have been issued.

Clean glassware thoroughly, using a detergent suited to the residue and rinsing with reagent water, since residual detergent or acid affects results. Avoid abrasives and strong alkalis that etch glass and remove graduation marks, and never use hydrofluoric acid in glass. Dry volumetric glassware by air or with solvent rather than heat, because heating changes the calibrated volume. Handle ground joints carefully, store stoppers loosely or with a spacer and avoid seizing by keeping joints clean. Check for chips, cracks and star cracks before use, since damaged glassware can fail under vacuum or heat. Keep the calibration certificate and recheck or replace volumetric items that are damaged or of unknown history.

How do I select the right Graduated Measuring Cylinder?

Choose a cylinder for approximate measuring and size it so the required volume falls in the upper part of the scale. Confirm class and graduation. RFQ: capacities, class, graduation size and certificate needs. Provide the capacities and graduation size.

How does it compare with other Glassware variants?

Choose the item by function and accuracy. Use Class A volumetric flasks and pipettes where the volume must be accurate, for standards, dilutions and titrations, and Class B or graduated items for approximate work. Select the material for the chemistry: borosilicate 3.3 for general laboratory use, and avoid glass for hydrofluoric acid, hot concentrated alkali and some fluoride-containing reagents, where plastic is safer. Match capacity and neck size to the application, and use narrow-neck flasks for mixing and wide-neck for solids. Check that graduations are legible and durable when buying, and confirm the calibration certificate for volumetric items. Consider whether low-extractable or amber glass is needed for light-sensitive or trace work, and plan cleaning and drying that will not damage the marks.