26 products

26 products

Measuring flasks

Volumetric flasks from BRAND deliver precise results in chemistry and pharmaceutical applications. Here you will find the right glass or plastic volumetric flasks for producing dilution series, for calibrating instruments and for many other applications.

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Volumetric flasks, glass

BRAND volumetric flasks provide the highest accuracy. BLAUBRAND® Volumetric Flasks – Durable Quality. Strict statistical quality controls ensure maintenance of these high standards. Volumetric flasks are indispensable for preparing dilutions and standard solutions. Standard volumetric flasks are supplied with a square-grip PP stopper with a dripping tip. These stoppers reduce the danger of breakage if a flask tips over, and help to prevent it from rolling off the workbench. All BLAUBRAND® volumetric flasks are supplied with a batch number and an accompanying batch certificate in the original packaging. On request, they are available also with an individual certificate, USP individual certificate or DAkkS calibration certificate. With the exception of the wide neck design, the graduated flasks are also available with USP individual and batch certificates. Trapezoidal volumetric flasks: Small capacity standard volumetric flasks can tip over more easily due to their higher center of gravity. Trapezoidal measuring flasks have a much larger base area which greatly improves stability! Testing flasks for dispensers: Volumetric flask with 3 marks, DAkkS-calibrated, BLAUBRAND®, class A, DE-M marking. Boro 3.3, DIN EN ISO 1042. Calibrated to contain (TC, In). Incl. DAkkS-certificate. The volumetric flask with 3 marks is used to check the functioning of a dispenser. The mark in the middle shows the nominal volume, the upper and lower marks show the error limits as specified in the table below. If the error limit is excee- ded even with repeated measurements, the dispenser is defective. The DAkkS-calibrated volumetric flask does not replace the gravimetric test of the monitoring of measuring instruments according to ISO 8655.

Synthetic coating for better protection

Volumetric flasks, BLAUBRAND®, PURprotect, Class A: The PUR coating envelops the volumetric flasks like a protective skin. In the event of glass breakage, the safety coating helps contain the glass fragments. Compared to uncoated glass flasks the electrostatic charge is not increased. The light blue coating facilitates optical distinction. The maximum operating temperature at dry heat is 135°C (exposure time < 30 min). Frequent autoclaving at 121 °C reduces splintering protection. Cleaning up to max. 95 °C. The PUR coating envelops the volumetric flask like a protective skin. In the event of glass breakage, the safety coating helps contain the glass fragments. Compared to uncoated glass flasks the electrostatic charge is not increased. The light blue coating facilitates optical distinction. The maximum operating temperature at dry heat is 135°C (exposure time < 30 min). Frequent autoclaving at 121 °C reduces splintering protection. Cleaning up to max. 95 °C.

Volumetric flasks, plastic

Volumetric flask, PP, high clarity: Flask with PP stopper. Error limits according to class B, DIN EN ISO 1042. Calibrated to contain (TC, In). Exposure to temperatures up to 60 °C will not cause permanent exceeding of error limits! Cleaning up to max. 60 °C is recommended to preserve marks and inscriptions. Volumetric flask, PMP, transparent: Flask with PP stopper. Error limits (EL) according to class A respectively B, DIN EN ISO 1042. Class A incl. one batch certificate. Calibrated to contain (TC, In). Exposure to temperatures up to 121 ºC (autoclaving) will not cause permanently exceeded error limits! Cleaning up to max. 60 °C is recommended to preserve marks and inscriptions. Volumetric Flasks with Screw Cap, PFA: Flask with screw cap. Error limits according to class A, DIN EN ISO 1042. Calibrated to contain (TC, In). Incl. one batch certificate. Autoclavable, easy to clean. PFA screw cap with molded sealing ring. Exposure to temperatures up to 121 ºC (autoclaving) will not cause permanent exceeding of error limits! Cleaning up to max. 60 °C is recommended to preserve marks and inscriptions.

Frequently Asked Questions (Measuring flasks)

What kind of screening inks does BRAND use for printing the volumetric flasks?

Blue and white enamel are printed on the outer surface and provide a high contrast and an optimal combination of chemical resistance and legibility for BLAUBRAND (cl. A) and SILBERBRAND (cl. B) volumetric flasks. Amber diffusion stain is used for BLAUBRAND®-ETERNA (cl. A) and SILBERBRAND-ETERNA (cl. B) volumetric flasks. This color diffuses into the glass surface and can therefore only be removed by abrasion or glass corrosion.

For what kind of application are volumetric flasks with 3 marks useful?

The volumetric flask with 3 marks is used to check the functioning of a dispenser. The mark in the middle shows the nominal volume, the upper and lower marks show the error limit. If the error limit is exceeded even with repeated measurements, the dispenser is defective.

What kind of special volumetric flasks do BRAND offer?

BRAND offers special volumetric flasks for Kohlrausch sugar analysis and oil content determination in accordance to DIN 51368. Both are made of high quality borosilicate glass 3.3.

What is the difference between Class A and Class B?

Class A stands for highest quality grade volumetric flasks in accordance to DIN EN ISO 1042 and, therefore, for tight error limits (BLAUBRAND®). Class B volumetric flasks (SILBERBRAND) have larger error limits than Class A volumetric flasks, usually twice as much.

Is it better to use a PP stopper instead of a glass stopper?

Usually PP stoppers are cheaper than glass stoppers, but glass stoppers can resist more chemicals. For instance, PP reacts with highly concentrated nitric or sulfuric acid and is therefore not suitable as stopper, while glass shows no reaction with these chemcials. Hence, it depends on the application you want to use the volumetric flasks for.

What advantages do PURprotect volumetric flasks have?

In the event of breakage, the safety polyurethane-coating helps to contain the glass fragments. Compared to uncoated glass flasks the electrostatic charge is not increased.

What is the difference between Class A and AW and Class B and BW, respectively?

The extension 'W' refers to wide neck as these flasks contain necks with larger inner diameters and thus larger neck sizes. In accordance to DIN EN ISO 1042 these wide neck flasks have to be marked with extension 'W' as the error limits of these flasks are a bit higher compared to normal or narrow neck flasks.

What advantages do amber volumetric flasks have?

Amber bulb-shaped flasks preserve light-sensitive chemical solutions from UV radiation. The chemical solution only comes into contact with borosilicate glass 3.3 and not with the amber stain. BLAUBRAND® amber flasks are made by diffusion of amber stain into the outer surface of clear glass.

What advantages do trapezoidal measuring flasks have?

Small capacity standard volumetric flasks can tip over more easily due to their higher center of gravity. Trapezoidal measuring flasks have a much larger base area which greatly improves stability.

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