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Used, in good condition
Multi-channel photometric controller supporting up to 4 sensors with configurable 4-20 mA outputs and relay alarms.
The Optek C4000 Multi Channel Photometric Converter is a versatile photometric controller designed for precise operation of up to four UV, VIS, and NIR absorption optical sensors simultaneously. It supports a wide range of color measurement scales, including APHA/HAZEN/Pt/Co, AOCS, ASTM, EBC, ASBC, Gardner, ICUMSA, KLETT, RBU, and Saybolt, as well as turbidity scales such as CU, ppm, FTU, NTU, FAU, and EBC.
Key technical features include:
The C4000's modular design with included AF16 turbidity sensor support makes it critical for biopharmaceutical production pipelines and essential in molecular cloning workflows where absorption and turbidity tracking enhance process accuracy and reproducibility. Its extensive compatibility with internationally recognized color and turbidity standards positions this controller as a reliable interface for advanced fluorescence analysis and live-cell imaging systems performing spectrophotometric measurements.
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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.
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 8 November 2026
The middle half of the 390 with a price runs from €259 to €5,223.