Lab heating, cooling, and vacuum equipment buying usually starts with a simple fork in the road: do you need a recirculating chiller, a rotary evaporator, or both? The four listings here cover exactly that choice-a refrigerated PolyScience circulator, two Uimoso recirculating chillers, and a Taishi rotary evaporator. The right pick depends on the job, not just the price tag: external temperature control, sample preservation, and solvent evaporation all make different demands on the hardware.
Quick take
If you need refrigerated circulation with a 7-liter reservoir plus programming and connectivity options, the PolyScience AP07R-20-A11B chiller is the one that bundles the described control features into a single listing. If you need a bench-top recirculating chiller for general lab cooling and heating, the lower-listed Uimoso unit covers the same stated model and temperature range as the other Uimoso chiller at a lower listed price. If your process is solvent removal, the Taishi rotary evaporator is the only rotovap in the group and gives you a manual-lift glass setup to pair with a chiller and vacuum pump.
Price comparison
Listed prices run from $516.99 for the Taishi rotary evaporator to $1,650.00 for the PolyScience chiller, a gap of $1,133.01. The table below shows the four listings at their listed prices.
| Product | Listed Price | Price Bar |
|---|---|---|
| PolyScience AP07R-20-A11B chiller | $1,650.00 | |
| Uimoso Laboratory Chiller Circulator | $740.34 | |
| Taishi Rotary Evaporator | $516.99 | |
| Uimoso Laboratory Recirculating Chiller | $668.99 |
Decision matrix
Use these pairings to narrow down the choice:
- Programmable refrigerated circulation with external sensor and remote control: PolyScience AP07R-20-A11B chiller.
- Bench-top recirculating chiller for samples and reactions: start with the lower-listed Uimoso Laboratory Recirculating Chiller, and compare it with the Uimoso Laboratory Chiller Circulator if the listing differences matter.
- Solvent evaporation alongside a chiller and vacuum pump: Taishi Rotary Evaporator.
- A stainless steel countertop tank for routine temperature control: either Uimoso listing, with the lower-listed one as the first look.
Product notes
PolyScience AP07R-20-A11B chiller
The PolyScience listing is the only one described as a refrigerated circulator with a 7-liter reservoir. The description calls out time/temperature programming with no stated program limits, a 4.3-inch SmartTouch display, a variable-speed pump with open- and closed-loop external circulation, and USB, Ethernet, RS-232/RS-485 connectivity. It also lists remote on/off and an external temperature probe, so it suits setups that need remote control or temperature trend review.
The main limitation is the condition: new-open box rather than factory sealed, which matters for labs that require untouched equipment.
Uimoso Laboratory Chiller Circulator
This Uimoso listing describes a bench-top recirculating chiller with a 304 stainless steel countertop water tank and dual circulation. The internal mode keeps small-scale experiments at a uniform temperature, while the external mode connects to outside equipment for larger reactions and industrial-style processes. The description also mentions a cold liquid flow valve and a temperature display accuracy of ±0.01°C, which gives you fine-grained setpoint control.
The limitation is practical: the listed dimensions are 12.6 x 15.6 x 26.2 inches and the net weight is 54.5 pounds, so it needs a stable bench and a fair amount of space. The other Uimoso chiller in this group shares the same model number and temperature range, so the purchase decision may come down to listing choice rather than capability.
Taishi Rotary Evaporator
This Taishi rotary evaporator is the only evaporation-focused listing in the group. Its title describes a 2L rotovap with a 1L evaporation flask, a 1L collecting bottle, a stainless steel bracket, and high-temperature resistant glass. The manual-lift mechanism lets you raise and lower the glassware by hand. Because the title says it connects to a vacuum pump and chiller, it fits into a lab system that already includes those companions.
The limitation is scope: for a lab that needs temperature-controlled liquid circulation, a rotovap is not a substitute for a chiller. This listing addresses the evaporation step, not the cooling or vacuum step.
Uimoso Laboratory Recirculating Chiller
This Uimoso listing is the lower-listed member of the recirculating chiller pair. It carries the same DC-0506 model number as the other Uimoso chiller, along with the same 304 stainless steel countertop water tank and the same maximum and minimum constant temperature figures. The description detail about internal and external dual circulation also matches, so from a capability standpoint it is the lower-listed way to get that described feature set.
The limitation is the temperature envelope itself: the constant range stops at 23°F on the low end and 212°F on the high end. If your application needs deeper cooling or higher heating than that, this listing won't cover it. It also shares the same 54.5-pound weight and 12.6 x 15.6 x 26.2-inch footprint as the other Uimoso chiller, so bench space is the same consideration.
Final recommendation by use case
If the workflow is refrigerated temperature control with external circulation and connectivity, the PolyScience AP07R-20-A11B chiller is the match. If the workflow is everyday lab cooling and heating on a bench-top chiller, the lower-listed Uimoso Laboratory Recirculating Chiller is the listing to start with, and the other Uimoso chiller is a near-equivalent alternative if its product title matches your lab order better. If the workflow is rotary evaporation, the Taishi Rotary Evaporator is the rotovap to build around.
