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High-precision 5g calibration weight, E2 class, in stainless steel for laboratory use.
The ZWIEBEL 5g Calibration Weight, E2 Class, is a high-precision stainless steel weight designed for accurate laboratory calibration. This expertly crafted weight is part of the E2 class, ensuring exceptional accuracy with a maximum permissible error of ± 0.05 mg. Each weight is verified on a precision balance capable of measurements up to 0.01 g (10 mg). It comes housed in a durable plastic box, though it is provided uncalibrated. Ideal for laboratories requiring dependable mass standards.
Lab equipment markets are fragmented. Buyers spend weeks calling distributors, comparing quotes, and verifying supplier reliability. Sellers struggle to reach global research labs.
We built Questpair to fix this. Every supplier on the platform is verified before listing. Every quote you receive comes from a real, vetted seller. AI prepares your case in minutes, then a real specialist takes over.
We're an independent team based in The Netherlands, working with research labs and procurement teams across Europe and worldwide.
With a service contract, ten to fifteen years is normal for most benchtop instruments. Detectors and pumps are the parts that wear first.
Often, yes. Verified suppliers frequently work with service partners converting the instrument. If applicable, we can list servicing options 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 23 October 2026
