A lab technician in a white coat operates a PolyScience PolyTemp circulator, holding a tablet and a graduated cylinder with blue liquid in a modern laboratory

Verify Circulator Performance without Waiting for Service

Self-diagnostics turn constant temperature control equipment into troubleshooting partners

Written byPolyScience
InterviewingPhilip Preston
Updated | 1 min read
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Q: How can labs determine whether temperature control issues stem from their circulator or elsewhere in the system?

When a reaction fails or viscosity readings scatter, the temperature control equipment often takes the blame. Labs schedule service or ship equipment back to the manufacturer, only to hear "no problem detected". PolyScience found that 22 percent of warranty returns fall into this category—equipment pulled from service that was functioning correctly, costing labs time and revenue. 

The real culprit might be a faulty sensor on another instrument or a clogged filter. Units arrive meeting specifications, but labs have few ways to confirm the circulator still delivers them after months of use. 

A: The new PolyTemp line of circulators stores factory test data in onboard memory and lets users verify performance on demand.

Every PolyTemp circulator undergoes automated testing during production—heating response, cooling capacity, and control stability. The circulator retains this baseline data internally.

When questions arise, a lab manager runs the self-test function; the unit repeats the factory tests and reports whether it still meets specifications. A passing result redirects troubleshooting elsewhere in the system. A failing result identifies where degradation occurred. Either way, the guesswork disappears. 

The same function generates timestamped performance records for compliance documentation, replacing manual logging with traceable, instrument-generated data.

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Interviewing

  • Philip Preston is the President and CEO of PolyScience, a manufacturer of precise liquid temperature control equipment founded in 1963. In addition to overseeing the development of laboratory tools such as DuraChill® recirculating chillers, Preston is noted for adapting laboratory thermal circulators for culinary use—a crossover instrumental in introducing commercial sous vide cooking to the United States.

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