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Description
PolyScience 45 L Refrigerated & Heated Circulating BathsOverview Capable of reaching temperatures as low as 25C and as high as 135C, PolyScience 45 Liter Refrigerated Heated Circulating Baths provide dependable temperature control for a wide variety of laboratory cooling applications. Features Working temperatures as low as 25C and as high as +135C Temperature stabilities to 0. 005C (varies by controller) Controller options with large, intuitive displays and multiple communication options Large bath
Overview
Capable of reaching temperatures as low as -25°C and as high as 135°C, PolyScience 45 Liter Refrigerated/Heated Circulating Baths provide dependable temperature control for a wide variety of laboratory cooling applications.
Features
- Working temperatures as low as -25°C and as high as +135°C
- Temperature stabilities to ±0.005°C (varies by controller)
- Controller options with large, intuitive displays and multiple communication options
- Large bath openings and easy to clean surfaces
- Swivel 180™ Rotating Controllers
- LidDock™ self-stowing reservoir cover
- DuraTop™ insulating, chemical-resistant top deck
- WhisperCool™ Environmental Control System
- Cool Command™ modulated refrigeration system
- Reservoir drain
- Washable air filter
PolyScience Refrigerated/Heated Circulators come with the following accessories:
- Reservoir cover
- Bypass tubing
- Male inlet and outlet adapters for 3/8, 1/4, and 3/16" (.95, .63, and .47 cm) tubing, 1/4" to M16 adapters also included on 50Hz units
- 6' (1.83m) standard grounded electrical cord with country-specific plug
Controllers
Specifications and features for the PolyScience Refrigerated & Heated Circulating Baths vary based on the controller chosen. Some key specifications are in the table below, and additional features for each controller are listed below the table.
| - | Advanced Programmable (AP) | Advanced Digital (AD) |
|---|---|---|
| Maximum Temperature | 135°C | 135°C |
| Temperature Stability | ±0.005°C | ±0.01°C |
| Pump Type | Pressure/Suction, Variable-Speed | Pressure/Suction, Variable-Speed |
| Programmability | OpenMode - unlimited programs and steps | N/A |
| Connectivity | USB-A & B, Ethernet, RS-232/RS-485, Remote On/Off, External Temperature Probe | USB-A & B, Ethernet, RS-232/RS-485, External Temperature Probe |
*DIN 12876-1 Class III devices are rated for use with flammable liquids. DIN 12876-1 Class I devices may be used with non-flammable liquids only.
Safety Rating* DIN 12876-1 Class III DIN 12876-1 Class III DIN 12876-1 Class III DIN 12876-1 Class III DIN 12876-1 Class I DIN 12876-1 Class I
Advanced Programmable Features
- Working Temperature: From -25° up to +135°C
- Temperature Stability: ±0.005°C
- Safety Rating: DIN 12876-1 Class III (for use with flammable liquids)
- External Temperature Control Capability: Yes
- Pump: Variable-speed
- External Circulation: Open- or closed-loop
- OpenMode time time/temperature programming (no restrictions on number of programs or steps)
- Intuitive 4.3” (10.9 cm) SmartTouch display
- 11 languages: French, German, Spanish, Chinese, Portuguese, Russian, Hindi, Arabic, Italian, Korean, English
- Variable speed pump with open- and closed-loop external circulation capability
- Swivel 180™ Rotating Controller
- On-board connectivity: USB-A & B, Ethernet, RS-232/RS-485, remote on/off and external temperature probe
- Event scheduling (time & date) with real-time clock
- Review temperature trends for up to 10 days
- Multiple selectable “home” screens
- On-screen help
- Automatic and/or user-adjustable performance optimization
- 10-point calibration capability
- Includes Enhanced Performance Hardware & Software Package (Pt100 temperature probe, USB flash drive for data logging, stainless steel fittings and tubing adapters, PolyScience LabVIEW Virtual Instrument, iPhone application download)
Advanced Digital Features
- Working Temperature: From -25° up to +135°C
- Temperature Stability: ±0.01°C
- Safety Rating: DIN 12876-1 Class III (for use with flammable liquids)
- External Temperature Control Capability: Yes
- Pump: Variable-speed
- External Circulation: Open- or closed-loop
- Intuitive 3.75” (9.5 cm) display with touch-pad control
- 4 languages: French, German, Spanish, English
- Swivel 180™ Rotating Controller
- On-board connectivity: USB-A & B, Ethernet, RS-232/RS-485, and external temperature probe
- On-screen prompts
- Automatic performance optimization and specific heat tuning
- Single-point calibration capability
Please note: PolyScience Refrigerated & Heated Circulating Baths are manufactured at the time the order is placed and have a 2-3 week lead time.
Key Attributes
|
Type |
Stirred / Circulating Baths |
|
Incubation |
Yes |
|
Refrigeration |
Yes |
|
Temp Range (°C) |
Ambient -25 to 135 |
|
Capacity (L) |
45 |
| Circulation | Internal & External |
|
Brand |
PolyScience |
|
MaxFlow Rate (l/min) |
20.1, 11 |
|
Temp Stability (°C) |
±0.005, ±0.01 |
|
Timer |
Yes |
|
Alarms |
Yes |
|
Digital or Mechanical |
Digital |
|
Data connection |
Yes |
|
Tank Material |
Stainless Steel |
|
Sample Agitation |
No |
|
Media Racks Available |
No |
|
Warranty (years) |
2 |
|
Weight (lb) |
180 |
|
Width (in) |
35.8 |
|
Depth (in) |
22.4 |
|
Height (in) |
42.1 |
Manufacturer specifications
| Model | AD45R-20 | AP45R-20 |
| Description | -25, 45 L Ref. Circulator | -25, 45 L Ref. Circulator |
| Controller Type | Advanced Digital | Advanced Programmable |
| Display | 3.75" Touch-Pad LCD | 4.3" SmartTouch Touchscreen |
| Connectivity | Ethernet, USB A & B, RS232/addressable RS485, External Temperature Probe | Ethernet, USB A & B, RS232/addressable RS485, Remote On/Off, External Temperature Probe |
| Languages Supported | 4: French, German, Spanish, English | 11: French, German, Spanish, Chinese, Portuguese, Russian, Hindi, Arabic, Italian, Korean, English |
| Time/Temperature Programs & Steps | N/A | Open Mode: No restriction on the number of programs or steps |
| Swivel 180 Rotating Controller | Yes | Yes |
| Working Temperature Range °C | -25° to 135° | -25° to 135° |
| Temperature Stability °C | ±0.01° | ±0.005° |
| Fluid Optimization/Specific Heat Tuning | Automatic and/or user-adjustable | Automatic and/or user-adjustable |
| Temperature Calibration Capability | 1-point | 10-point |
| Working Access (L x W x D) (cm) | 54.9 x 39.8 x 14 cm | 54.9 x 39.8 x 14 cm |
| Pump Type | Pressure/Suction | Pressure/Suction |
| External Temperature Control Capability | Yes | Yes |
| Flammability Class (DIN 12876-1) | III (FL) | III (FL) |
|
Working Temperature Range °F |
-13° to 275° | -13° to 275° |
| Working Temperature Range °C | -25° to 135° | -25° to 135° |
| Nominal Cooling Capacity @ +20C (W) | 1400 | 1400 |
| Reservoir Capacity (gallons) | 11.88 | 11.88 |
| Reservoir Capacity (liters) | 45 | 45 |
| Reservoir/Tank Material | Stainless Steel | Stainless Steel |
| Reservoir Cover | Included | Included |
| DuraTop | Yes | Yes |
| Cleanable Air Filter | Yes | Yes |
| Working Access (L x W x D) (inches) | 21.6 x 15.68 x 5.5 in | 21.6 x 15.68 x 5.5 in |
| Working Access (L x W x D) (cm) | 54.9 x 39.8 x 14 cm | 54.9 x 39.8 x 14 cm |
| Temperature Stability °F | ±0.02° | ±0.02° |
| Temperature Stability °C | ±0.01° | ±0.005° |
| Display | 3.75" Touch-Pad LCD | 4.3" SmartTouch Touchscreen |
| Display Resolution (Set) | 0.01 | 0.01 |
| Display Resolution (Read) | 0.01 | 0.001 |
| Pump Type | Pressure/Suction | Pressure/Suction |
| Pump Speed | Variable | Variable |
| Process Connections | 1/4" (F) NPT | 1/4" (F) NPT |
| External Temperature Control Capability | Yes | Yes |
| Flammability Class (DIN 12876-1) | III (FL) | III (FL) |
| Over-Temperature Protection / Failsafe Heater Control | Yes | Yes |
| Low Liquid Level Protection | Yes | Yes |
| WhisperCool Environmental Control Technology | Yes | Yes |
| Cool Command Refrigeration Technology | Yes | Yes |
| Reservoir Drain | Yes | Yes |
| Included Software | PolyTemp Viewer, USB driver | PolyTemp Viewer, TDMS file viewer, USB driver, Time/Temperature Program Generator, PolyTemp Remote iPhone application |
| Maximum Ambient Temperature °F | 95° | 95° |
| Maximum Ambient Temperature °C | 35° | 35° |
| Overall Dimensions (L x W x H) (inches) | 35.8 x 22.4 x 42.1 in | 35.8 x 22.4 x 42.1 in |
| Overall Dimensions (L x W x H) (cm) | 90.9 x 56.8 x 107 cm | 90.9 x 56.8 x 107 cm |
| Refrigerant | R134a | R134a |
| Environmental Compliance | RoHS, WEEE | RoHS, WEEE |
| Shipping Weight (pounds) | 180 | 180 |
| Shipping Weight (kilograms) | 81.5 | 81.5 |
| Part Number | AD45R-20-A13D | AP45R-20-A13D |
| Maximum Pressure (psi) | 4.3 | 4.3 |
| Maximum Pressure (bar) | 0.3 | 0.3 |
| Maximum Pressure Flow Rate (gpm) | 5.3 | 5.3 |
| Maximum Pressure Flow Rate (l/min) | 20.1 | 20.1 |
| Maximum Suction Flow Rate (gpm) | 3.9 | 3.9 |
| Maximum Suction Flow Rate (l/min) | 14.7 | 14.7 |
| Cooling Capacity @ -20°C (W) | 250 | 250 |
| Cooling Capacity @ 0°C (W) | 800 | 800 |
| Cooling Capacity @ +20°C (W) | 1400 | 1400 |
| Cooling Capacity @ +100°C (W) | 1400 | 1400 |
| Included Hardware | Nylon hose adapters for 3/8", 1/4", and 3/16" | Nylon hose adapters for 3/8", 1/4", and 3/16" |
| Heater Wattage | 2200 | 2200 |
| Electrical Requirements (VAC/Hz/Ph/A) | 208-230/60/1/13 | 208-230/60/1/13 |
| Regulatory Approvals | ETL | ETL |
FAQ
What materials of the circulating bath come into contact with the bath liquid?
The wetted parts of the instrument are all 300 series stainless steel.
I would like to perform a heating / cooling program where the temperature ramps from one set point to another over time. Are the PolyScience 45 L Refrigerated & Heated Circulating Baths capable of this?
That depends on the controller used. Only the Advanced Programmable and Performance Programmable controllers can be programmed to perform ramps.
It is possible to have the circulation on without any temperature control being on?
No. If the circulation is on, then a temperature setting must be selected.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
Based on 2227 reviews
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Product Reviews
★★★★★ 3
Really Nice Shelves BUT....
Color: Rustic Brown, Size: 36"L x 8"D, Set of 2, Color: Rustic Brown, Size: 36"L x 8"D, Set of 2
I do like these shelves, they look great for cheaper low end particle board made to look like wood. However I took off stars because they made installation unnecessarily hard. I'll explain....
If you look in my picture the mounting bracket has plenty of options/slots to use.
AND in the instructions they clearly show you how to find studs to properly mount the brackets. Meaning the manufacturer know stud distance. They even show in the instructions that studs are clesrly 16" apart!
Now get this, the mounting brackets are plenty long enough (roughly 22" without measuring) to mount on two studs 16" apart so the shelves are mounted in wood which is stronger and superior mounting instead of drywall.
HOWEVER, THE SLOTTED HOLES ON THE MOUNTING BRACKET ARE NOT 16" APART. None of them. There's tons of slotted holes to use on the bracket and zero of them are 16" apart.
Now if I want to mount screws jn 2 studs I have to drill in the mounting bracket to make a new hole. Taking up extra time, messing with the integrity of the mounting steel.
I don't understand. It's almost like they did this on purpose.
What should have been a 10-15 minute install turned into getting proper drill bits, drilling metal, and taking 45-50 minutes to do it properly.
It just put a sour taste in my mouth and that is my reasoning for the 3 of 5 starts. I would make it 3.5 stars if it was an option. Otherwise the shelves look pretty decent for low end shelving.
I recommend them only if you're handy with a drill and tape measure. If you can handle drilling the mount bracket to go into a stud, go ahead and grab these.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 4, 2025
★★★★★ 5
Lengthy Shelves
Color: Black, Size: 72"L x 8"D, Set of 2, Color: Black, Size: 72"L x 8"D, Set of 2
I love these shelves! I specifically wanted shelves that were very long and that would, when put together, span the length of my room. These fit the bill!
Quality: I was very worried about finding something that would hold up a good amount of weight, knowing I wanted to books on these shelves above my head! And I also wanted something with a nice texture that would be easily whipped down for dust. Both these points were covered.
I have hade these shelves for several months now and they have successfully held ip a decent bit of weight, is a true black cooler with wood grain detail, and has not faded in color with dusted and whipped down to be cleaned.
These are great quality and with the price!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 11, 2026
★★★★★ 5
Beautiful!
Color: Rustic Brown, Size: 72"L x 8"D, Set of 2, Color: Rustic Brown, Size: 72"L x 8"D, Set of 2
Very sturdy and a great addition to my daughters living room!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 26, 2026
★★★★★ 5
Good frame
Perfect for my husband's army photos in the house. The wood is very nice and smooth.
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Reviewed in the United States on February 18, 2026
★★★★★ 5
Inexpensive frame with real wood and real glass
Color: Natural Pine Wood, Size: 12x16
Pros:
- This frame uses real glass, which feels more premium than the usual plastic in the price range
- The mat was cut nicely
- I got the pine variant. Pine can look coarse, but for the two frames I purchased, the wood was oriented so that the fine grain faces forward, so it looked more refined.
Cons:
- Mat is a little thin
- I might be missing it, but it looks like dimensions for the mat cutout are not provided in the product description. In case you are wondering what the dimensions are, I measured my mat opening to be 8.4" x 11.5" (I got the 12x16 matted to 9x12).
Note that the mat is an off-white color, almost an ivory white.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 4, 2025