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Description
PolyScience 20 L Refrigerated & Heated Circulating BathsOverview Capable of reaching temperatures as low as 40C, PolyScience Refrigerated Heated Circulating Baths provide dependable temperature control for a wide variety of laboratory cooling applications. Features Working temperatures as low as 40C and as high as +200C (varies by controller) Temperature stabilities to 0. 005C (varies by controller) Controller options with large, intuitive displays and multiple communication options Large bath openings and
Overview
Capable of reaching temperatures as low as -40°C, PolyScience Refrigerated/Heated Circulating Baths provide dependable temperature control for a wide variety of laboratory cooling applications.
Features
- Working temperatures as low as -40°C and as high as +200°C (varies by controller)
- 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) | Standard Digital (SD) | MX |
|---|---|---|---|---|
| Maximum Temperature | 200°C | 200°C | 170°C | 135°C |
| Temperature Stability | ±0.005°C | ±0.01°C | ±0.04°C | ±0.07°C |
| Pump Type | Pressure/Suction, Variable-Speed | Pressure/Suction, Variable-Speed | Pressure Only, 2-Speed | Pressure Only, 1-Speed |
| Programmability | OpenMode - unlimited programs and steps | N/A | N/A | 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 | RS-232 | N/A |
*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 -40° up to +200°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 -40° up to +200°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
Standard Digital Features
- Working Temperature: From -30° up to +170°C
- Temperature Stability: ±0.04°C
- Safety Rating: DIN 12876-1 Class I (for use with non-flammable liquids)
- Pump: 2-speed
- External Circulation: Closed-loop
- Large, universal icon and English display
- Swivel 180™ Rotating Controller
- On-board connectivity: RS-232 serial output
- On-screen prompts
- Automatic performance optimization
- Single-point calibration capability
Economy MX Features
- Working Temperature: From -30° up to +135°C
- Temperature Stability: ±0.07°C
- Safety Rating: DIN 12876-1 Class I (for use with non-flammable liquids)
- Pump: 1-speed
- External Circulation: Closed-loop
- Large, universal icon and English display
- On-screen prompts
- 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 -40 to 200 |
|
Capacity (L) |
20 |
| Circulation | Internal & External |
|
Brand |
PolyScience |
|
MaxFlow Rate (l/min) |
20.1, 13.5, 11 |
|
Temp Stability (°C) |
±0.005, ±0.01, ±0.04, ±0.07 |
|
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) |
130 |
|
Width (in) |
24 |
|
Depth (in) |
16.6 |
|
Height (in) |
26.9 |
Manufacturer specifications
| Model | AD20R-30 | AP20R-30 | MX20R-30 | SD20R-30 |
| Description | -30, 20 L Ref. Circulator | -30, 20 L Ref. Circulator | -30, 20 L Ref. Circulator | -30, 20 L Ref. Circulator |
| Controller Type | Advanced Digital | Advanced Programmable | MX | Standard Digital |
| Display | 3.75" Touch-Pad LCD | 4.3" SmartTouch Touchscreen | 3.25" LCD | 3.75" Touch-Pad LCD |
| Connectivity | Ethernet, USB A & B, RS232/addressable RS485, External Temperature Probe | Ethernet, USB A & B, RS232/addressable RS485, Remote On/Off, External Temperature Probe | N/A | RS232 |
| Languages Supported | 4: French, German, Spanish, English | 11: French, German, Spanish, Chinese, Portuguese, Russian, Hindi, Arabic, Italian, Korean, English | N/A | N/A |
| Time/Temperature Programs & Steps | N/A | Open Mode: No restriction on the number of programs or steps | N/A | N/A |
| Swivel 180 Rotating Controller | Yes | Yes | N/A | Yes |
| Working Temperature Range °C | -30° to 200° | -30° to 200° | -30° to 135° | -30° to 170° |
| Temperature Stability °C | ±0.01° | ±0.005° | ±0.07° | ±0.04° |
| Fluid Optimization/Specific Heat Tuning | Automatic and/or user-adjustable | Automatic and/or user-adjustable | N/A | Automatic |
| Temperature Calibration Capability | 1-point | 10-point | 1-point | 1-point |
| Working Access (L x W x D) (cm) | 25 x 31.6 x 14 cm | 25 x 31.6 x 14 cm | 25 x 31.6 x 14 cm | 25 x 31.6 x 14 cm |
| Pump Type | Pressure/Suction | Pressure/Suction | Pressure | Pressure |
| External Temperature Control Capability | Yes | Yes | N/A | N/A |
| Flammability Class (DIN 12876-1) | III (FL) | III (FL) | I (NFL) | I (NFL) |
|
Working Temperature Range °F
|
-22° to 392° | -22° to 392° | -22° to 275° | -22° to 338° |
| Working Temperature Range °C | -30° to 200° | -30° to 200° | -30° to 135° | -30° to 170° |
| Nominal Cooling Capacity @ +20C (W) | 915 | 915 | 915 | 915 |
| Reservoir Capacity (gallons) | 5.28 | 5.28 | 5.28 | 5.28 |
| Reservoir Capacity (liters) | 20 | 20 | 20 | 20 |
| Reservoir/Tank Material | Stainless Steel | Stainless Steel | Stainless Steel | Stainless Steel |
| Reservoir Cover | Included | Included | Included | Included |
| DuraTop | Yes | Yes | Yes | Yes |
| LidDock | Yes | Yes | Yes | Yes |
| Cleanable Air Filter | Yes | Yes | Yes | Yes |
| Working Access (L x W x D) (inches) | 9.85 x 12.45 x 5.5 in | 9.85 x 12.45 x 5.5 in | 9.85 x 12.45 x 5.5 in | 9.85 x 12.45 x 5.5 in |
| Working Access (L x W x D) (cm) | 25 x 31.6 x 14 cm | 25 x 31.6 x 14 cm | 25 x 31.6 x 14 cm | 25 x 31.6 x 14 cm |
| Temperature Stability °F | ±0.02° | ±0.02° | ±0.13° | ±0.08° |
| Temperature Stability °C | ±0.01° | ±0.005° | ±0.07° | ±0.04° |
| Display | 3.75" Touch-Pad LCD | 4.3" SmartTouch Touchscreen | 3.25" LCD | 3.75" Touch-Pad LCD |
| Display Resolution (Set) | 0.01 | 0.01 | 0.1 | 0.1 |
| Display Resolution (Read) | 0.01 | 0.001 | 0.1 | 0.1 |
| Pump Type | Pressure/Suction | Pressure/Suction | Pressure | Pressure |
| Pump Speed | Variable | Variable | One | Two |
| Process Connections | 1/4" (F) NPT | 1/4" (F) NPT | 1/2" O.D. Barbed Tubes | 1/4" (F) NPT |
| External Temperature Control Capability | Yes | Yes | N/A | N/A |
| Flammability Class (DIN 12876-1) | III (FL) | III (FL) | I (NFL) | I (NFL) |
| Over-Temperature Protection / Failsafe Heater Control | Yes | Yes | Yes | Yes |
| Low Liquid Level Protection | Yes | Yes | Yes | Yes |
| WhisperCool Environmental Control Technology | Yes | Yes | Yes | Yes |
| Cool Command Refrigeration Technology | Yes | Yes | Yes | Yes |
| Reservoir Drain | Yes | Yes | Yes | Yes |
| Included Software | PolyTemp Viewer, USB driver | PolyTemp Viewer, TDMS file viewer, USB driver, Time/Temperature Program Generator, PolyTemp Remote iPhone application | N/A | N/A |
| Maximum Ambient Temperature °F | 95° | 95° | 95° | 95° |
| Maximum Ambient Temperature °C | 35° | 35° | 35° | 35° |
| Overall Dimensions (L x W x H) (inches) | 24 x 16.6 x 26.9 in | 24 x 16.6 x 26.9 in | 24 x 16.5 x 28 in | 24 x 16.6 x 26.9 in |
| Overall Dimensions (L x W x H) (cm) | 61 x 41.9 x 68.3 cm | 61 x 41.9 x 68.3 cm | 61 x 41.9 x 71.1 cm | 61 x 41.9 x 68.3 cm |
| Refrigerant | R404A | R404A | R404A | R404A |
| Environmental Compliance | RoHS, WEEE | RoHS, WEEE | RoHS, WEEE | RoHS, WEEE |
| Shipping Weight (pounds) | 130 | 130 | 124 | 130 |
| Shipping Weight (kilograms) | 58.9 | 58.9 | 56.2 | 58.9 |
| Part Number | AD20R-30-A11B | AP20R-30-A11B | MX20R-30-A11B | SD20R-30-A11B |
| Maximum Pressure (psi) | 4.3 | 4.3 | 2.3 | 3.5 |
| Maximum Pressure (bar) | 0.3 | 0.3 | 0.16 | 0.24 |
| Maximum Pressure Flow Rate (gpm) | 5.3 | 5.3 | 3.6 | 2.9 |
| Maximum Pressure Flow Rate (l/min) | 20.1 | 20.1 | 13.5 | 11 |
| Maximum Suction Flow Rate (gpm) | 3.9 | 3.9 | N/A | N/A |
| Maximum Suction Flow Rate (l/min) | 14.7 | 14.7 | N/A | N/A |
| Cooling Capacity @ -20°C (W) | 165 | 165 | 165 | 165 |
| Cooling Capacity @ 0°C (W) | 505 | 505 | 505 | 505 |
| Cooling Capacity @ +20°C (W) | 915 | 915 | 915 | 915 |
| Cooling Capacity @ +100°C (W) | 915 | 915 | 915 | 915 |
| Included Hardware | Nylon hose adapters for 3/8", 1/4", and 3/16" | Nylon hose adapters for 3/8", 1/4", and 3/16" | Fitting Kit for External Applications | Nylon hose adapters for 3/8", 1/4", and 3/16" |
| Heater Wattage | 1100 | 1100 | 1100 | 1100 |
| Electrical Requirements (VAC/Hz/Ph/A) | 120/60/1/13 | 120/60/1/13 | 120/60/1/13 | 120/60/1/13 |
| Regulatory Approvals | ETL | ETL | ETL | ETL |
FAQ
I would like to perform a heating / cooling program where the temperature ramps from one set point to another over time. Are the PolyScience 20 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
4.5 ★★★★★
Based on 190 reviews
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Product Reviews
★★★★★ 5
Loud! Just Like She Likes It
Color: Hedgehog, Style: Big Squeak Hedgehog
My Great Dane loves this noisy toy. She prefers squeaky toys with loud, unusual squeakers. (I need to invest in earplugs.) She's not an agressuve chewer or rough player so this should last a long time. Like most squeaky toys she has, the squeaker wears out before the physical toy does and once the noise is gone she won't play with it any more. If others have a similar issue...check with your local animal shelter. Some (not all) will disinfect used toys for the dogs in their care.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 1, 2025
★★★★★ 5
Good toy
Color: Gator, Style: Accordionz (Grunt Sound)
Fun toy, holding up really well.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 1, 2026
★★★★★ 1
Fun while it lasts…
Color: Pink, Style: Grunt Sound
Fun while it lasts. Doesn’t last very long. This is our third one and last maybe a few weeks. The part that makes noise comes detached inside which causes to toy to no longer make noise, but also can be dangerous if it comes out.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 11, 2026
★★★★★ 4
Great alternative to the grunting pigs!
Color: Pink, Style: Grunt Sound
We go through A LOT of dog toys at my dog based business. The grunting pigs are super cute, but they are also super fragile. It is incredibly easy to dislodge the squeaker. (Grunter?) These are certainly not robust chew toys, but the squeaker is about 30% better at staying put than that of the pigs. It's also smaller, so it's easier for the smaller dogs to play with. These are a new favorite!
Update: August, 2024 I bought an orange hedgehog. Amazon won't let me review that separately so I had to add to my sheep review. The orange hedgehog is only 3 stars. It is made of a harder plastic than the bear and the sheep. It also has a standard squeaker, not the grunting of the bear and sheep. But harder plastic DOES NOT mean that it will withstand an aggressive chewer! If your dog likes to "kill the squeaker" they will be able to do so in minutes! This IS NOT a chew toy! If you are looking for a toy for an aggressive chewer, look at the Orbeez line from Outward Hound. The other thing that makes me less enthusiastic about the orange hedgehog is that the yellow paint started flaking off immediately. I will have to scrub it all off because it looks terrible! The dogs don't care, but their owners sure do! I haven't had that problem with the sheep or the bears. The orange hedgehog is almost like it's from a completely different company!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 16, 2024
★★★★★ 3
Cute
Color: Pink, Style: Grunt Sound
Really cute toy broke in a day and It stopped honking but my dog still plays with it. Durable material. Good toy overall. Please fix the honk and we can buy more like it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 1, 2026
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