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Microprocessor-controlled kinematic viscosity bath, 20–100°C, stainless steel, ASTM D445 compliant.
The Koehler K23900 is a temperature-controlled kinematic viscosity bath designed for precise measurement of petroleum product viscosities in accordance with ASTM D445 and related standards.
Optional accessories available for various viscometer types, holders, cooling coil assemblies, withdrawal bulbs, stoppers, white mineral oil, and ASTM thermometers (refer to product codes for details).
The K23900 bath provides stable, reliable temperature control with uniformity and stability compliant with ASTM requirements, suitable for glass capillary viscometry in petroleum research and quality control.
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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.
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.
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Last updated 19 October 2026
The middle half of the 1,352 with a price runs from €79 to €2,686.
