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Used Toa DKK HM-300 pH meter with GST-5721C pH electrode for precise acidity measurement in biotechnology labs
The Toa DKK HM-300 pH meter paired with the GST-5721C pH electrode is a laboratory instrument designed for precise measurement of acidity and alkalinity (pH levels) in solutions. This combination is widely used in biotechnology, molecular diagnostics, and bioprocessing workflows where accurate pH control is critical.
This unit is ideal for research professionals and laboratory technicians seeking affordable instrumentation for pH measurement in biotechnology and molecular biology applications, emphasizing cost-effectiveness while maintaining foundational functionality.
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.
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
