When you're shopping for lab heating cooling vacuum equipment, a refrigerated circulator is often the unsung hero. You need one that can hold a target temperature reliably, handle your bath or external loop, and fit your budget. The PolyScience AP07R-20-A11B chiller enters as a 7-liter unit that cools to -20°C and offers programming and connectivity normally found on much larger systems. The catch? This listing is for a new open-box unit.
Quick Verdict
The AP07R-20-A11B is a strong candidate for labs that need a flexible, programmable circulator. At $1,650, it's not a casual purchase, but the feature list justifies the price. The open-box condition is the main thing to weigh before you commit.
Who It Suits
This is a good fit for research or teaching labs that run temperature-sensitive protocols. The unrestricted time/temperature programming, with no limits on programs or steps, makes it easy to design ramps or multi-step runs. The variable-speed pump supports both open- and closed-loop external circulation, so you can use it with a bath or an external device. The 11-language interface and event scheduling with a real-time clock help in shared lab environments and unattended runs.
What Stands Out From the Listed Details
Three features are worth highlighting. First, the 10-point calibration capability lets you fine-tune temperature accuracy. Second, the ability to review temperature trends up to 10 days gives you a way to see how the unit behaved over time. Third, the connectivity suite-USB, Ethernet, RS-232/RS-485, remote on/off, external temperature probe-means you can integrate it with a larger data collection or control setup. The 4.3-inch SmartTouch display serves as the hub for these settings, and the Swivel 180 rotating controller is a practical design choice if your bench space is tight.
Meaningful Trade-offs
The listed condition is new open box, so the unit has been unsealed. That introduces some uncertainty about handling and included accessories. The price is a notable investment, so consider whether the open-box condition is acceptable for that amount.
Bottom Line
If you need a feature-rich refrigerated circulator for a lab and you're comfortable with an open-box purchase, the PolyScience AP07R-20-A11B is worth strong consideration. The combination of programming, calibration, and connectivity makes it a capable option.
Product Notes
PolyScience AP07R-20-A11B Chiller
This 7-liter refrigerated circulator is a solid pick if you need unrestricted time/temperature programming and external circulation. The 10-point calibration capability is a concrete reason to choose it. The main limitation is the open-box condition: the unit is listed as new open box, so you're not getting a factory-sealed product.
