Kundenbewertungen für VEVOR Labor-Kühl-/Umwälzpumpe, 6 l Kühler für Niedertemperatur-Kühlflüssigkeit, 23 °F–212 °F, Umwälzpumpen-Kühler, LCD-Display, Wasserbad-Umwälzwasserkühlung aus Edelstahl 304

I have been using this thermostat for about a week. I am not pushing it to the limits, just keeping it at a stable 20°C with a small amount (about 5 to 10%) of ethylene glycol added mainly as a disinfectant (not so much as an antifreeze). I rated its "quality" four stars for now because I still need to see how it performs over time. If it runs well for at least a year, I will update my rating to five stars. The price is very reasonable, and I agree with the previous reviewer on that point. However, long-term reliability is what really matters. These devices are normally expected to run continuously for years. I use six of them in parallel at different temperatures, although this is my first time buying from this manufacturer. Over the last fourteen years, I have replaced eight units, but two or at least one of the original units are still working.