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COFRAC-certified E2 class calibration weights (1 g–500 g) in cobalt alloy/stainless steel for precise lab balance calibration.
This Zwiebel COFRAC-certified calibration weight set comprises 12 precision E2 class weights ranging from 1 g to 500 g. The set includes 1 g, 2 g, 5 g, 10 g, 20 g, 50 g, 100 g, 200 g, and 500 g weights, designed for accurate calibration of analytical balances and precision scales essential in biotechnology labs and molecular diagnostics.
Key features include:
This weight set is critical for maintaining accuracy in laboratory balance calibration, making it a valuable tool for scientists and researchers involved in cell imaging, clinical diagnostics, and biomedical engineering fields. Its precise mass standards contribute to enhanced reproducibility and quality assurance in molecular cloning workflows and other advanced biotechnology applications.
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With a service contract, ten to fifteen years is normal for most benchtop instruments. Detectors and pumps are the parts that wear first.
Yes. Every verified supplier states which service partners cover the instrument, and we list that alongside the offer.
Ask a scientist through the request button. Parts are often available even when the instrument itself is discontinued.
Two to six weeks, depending on refurbishment scope and whether calibration is included.
We ship to 38 countries. Crating and customs handling are quoted with the instrument.
Tell us what you need and a scientist finds it for you, usually within the hour.
Last updated 19 October 2026
The middle half of the 603 with a price runs from €78 to €1,897.