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When your application demands precision and accuracy for dependable and repeatable results, turn to DWK Life Sciences — your partner on every lab journey. Our extensive portfolio of volumetric glassware includes the world’s most trusted brand names including, DURAN®, KIMBLE®, and KIMAX®. Designed, manufactured, and calibrated to deliver consistent accuracy, every piece meets or exceeds the most stringent ASTM and ISO regulatory requirements and our Class A, ASTM, and ISO glassware features thetightest tolerances available on the market.

Serialized and certified versions feature-complete traceability through a unique serial number printed on an accompanying certificate. And you can be confident that all calibrated glassware meets NIST certified standards.

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Dependable Precision Grounded in Real-World Requirements

Wherever precise volumes are critical — for quality control and validation labs, chromatography applications, or research labs — DWK Life Sciences brings our dedication and precision manufacturing volumetric flasks that deliver accuracy plus added traceability. Over 150 varieties of KIMBLE® KIMAX® volumetric flasks are available — each with the integrity you’ve come to trust.

When paired with volumetric flasks, DWK Life Sciences volumetric pipettes deliver the precision and traceability are necessary for lab work with serial dilutions, standards, buffers, analytes or modifiers — ideal for chromatography instrumentation, regulated methods, and analytical instrumentation.

KIMBLE® KIMAX® volumetric pipettes are offered in four levels:

  • Class A, TC serialized and certified (37006-series with Certificates of Calibration included and individually serialized numbers on the pipettes, matching the number printed on the certificate.)
  • Class A, TD/TC (37003-series)
  • Class A, TD (37002-series)
  • Class B, TD (37001-series)

KIMBLE® KIMAX® graduated cylinders and DURAN® measuring cylinders are available in over 125 configurations from Class A serialized and certified to educational grade. Design innovations include easy-to-read and accurate graduation intervals and the ability to accommodate years of lab use. Choose from a range of features such as various types of bumpers, bases, amber versions, safety-coated, and heavy-duty or super-heavy duty offerings.

At DWK Life Sciences we know that dependably accurate burets are a lab requirement whether you’re employing them in chemistry, academia, industrial and applied sciences labs, or in-field testing applications. All of our burets are manufactured from high-purity borosilicate 33 expansion glass with easy-to-read graduation marks — etched or ceramic — and many feature funnels fill styles to aid in the fluid introduction.

This versatile line of tilting dispensers is precision manufactured with fixed volumes ranging from 5 mL up to 100 mL. Dispensing heads feature precision-ground glass joints in either 24/40 or 29/42 versions for the quick and secure flask connections we’ve heard customers ask for. These unique dispensers improve workflow efficiency with flask volumes from 250 mL to 2000 mL. All glass components, including tilting dispenser replacement parts, are manufactured from 33 expansion, low-extractable borosilicate glass conforming to USP Type I and ASTM E438, Type I, Class A requirements.

Frequently Asked Questions

We’ve listened to customers and designed our pipettes with a colored ring marking at its upper end to make selection quick and easy. This color-coding is carried out according to DIN 12621.

All of our pipettes are used for precise volume measurement and are similar in shape to tubes. The difference between graduated pipettes and bulb pipettes lies in the shape and type of graduation. With bulb pipettes, only the total volume can be read off (there is no partial graduation). Graduated pipettes, however, are characterized by partial scaling, where partial volumes can be measured in addition to the total volume.

According to DIN, EN, and ISO, volumetric instruments are divided into two accuracy classes with a fixed error limit.

Here’s a quick guideline: Accuracy Class A always designates the highest accuracy with the
lowest error limit. For accuracy Class B, the double error limits of A/AS generally apply. For volumetric instruments of Class AS, calibrated to "EX", the suffix S indicates rapid execution. This accuracy variant is used for pipettes and Burets.

We’re happy to offer guidance here as cleaning and care are critical. Volumetricinstruments should be cleaned immediately after use either manually in an immersion bath or mechanically in a laboratory dishwasher. Make sure that the cleaning temperature is low, the residence time is short, and the alkalinity of the cleaning medium is also low. Volumetric instruments can then be dried (at max. 250°C) and autoclaved, disinfected, or sterilized.

The use of abrasive cleaning methods is not recommended at any time as this can damage the surface. Cleaning in an ultrasonic bath is possible, however, contact with the sound membranes should be avoided.

Dispensers are piston lifting attachments that can be used to measure defined quantities of liquid easily, quickly, and precisely, for example, from a laboratory bottle. When our dispensers are screwed onto laboratory bottles, the previously set quantity of liquid is sucked into the cylinder by an upward movement of the piston — accurate every time. The subsequent downward movement ejects the quantity of liquid via a cannula. With this principle, there is no need to adjust the meniscus.

For all Class A and AS volumetric instruments there is a retrace code which can be used to
easily download a batch certificate on our website.

No specific certificates are issued for Class B volumetric instruments.