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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
4.7 ★★★★★
Based on 956 reviews
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Product Reviews
★★★★★ 1
Won't purchase this one again.
Size: Large Triple
J.W. used to make a ring toy such as this, that was softer & thicker with a smaller black ring in the middle, that our dogs all, absolutely loved!!!!! But this one totally bores them to the point none of the dogs will pay it any attention! Please bring back the original 3 ring toy, that J.W. has now changed to just the one ring! I feel like they must have discontinued the toy with the 3 rings they used to sell, with the smaller black ring in the middle? I won't waist my $ on another one of these! Sadly, none of our 3 dogs will play with this specific toy at all! & I generally prefer to purchase J.W. brand toys for our dogs. But this toy doesn't attract them in anyway. It just sits around.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 6, 2026
★★★★★ 3
Great idea but didn't hold up!
Size: Large
My dog and I really enjoyed this as a tug toy to use where it kept my hands away from accidental nips. When we initially got it we let her play solo with it after our tug session and I noticed that she left little teeth puncture holes so we packed it away for awhile and exclusively used the other new toy we bought for her. After a few weeks we took this back out and, again, we loved it and this time I allowed her to play with it longer and although it was showing a lot of the little tooth marks it seemed to be holding up so I left it out with her. None seemed deep, just seemed like impressions from her teeth.
We continued to enjoy it for about a week where she'd carry it over to us for tug sessions, loop it on our feet when we were sitting watching tv and chewing on it a bit. I'd look at it when we'd tug and, like I said above, it seemed to be holding up. After one session of tug when she took it off to chew on and I was watching some tv I checked on her after awhile and she had bitten through the black side and had chewed up into small pieces about a two inch section of it. Small, little hard bits were in a pile on the floor. She didn't just bite through, it had broken into small, little pieces and hopefully I was able to get all of them and she didn't swallow any!
So if you want to get this exclusively as just a tug toy and not something for your dog to chew on and plan on putting it away after I think it will be okay for that and should last but if your dog is a serious chewer like ours is you may not want them to be allowed to chew on this. Seemed like it was going to last and then suddenly I was throwing away half of it and hoping she didn't eat any of the black bits. We still have the yellow side and will take that out for some tugging but no longer for her to play with freely!! She did tremendously love running around with this thing and would flip up the loose end and hook it on her face or our feet and was so cute to watch her!! Wish it had lasted!!
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Reviewed in the United States on May 9, 2013
★★★★★ 5
Name holds true.
Size: Large Triple
Just bought my second set of these.. first set lasted my healer almost 4 years and are still together but starting to split at the smaller seams so you can’t play as aggressive as my dog would like. We bought the second set and now she has her second wind! She loves tugging and I love knowing this toy will last a good while especially with an active dog!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 4, 2025
★★★★★ 5
My Aussie loves this bone!
This wishbone is so durable! My Australian shepherd is a big cheese and this is her go-to chew toy. It's a fave! She has spent HOURS chewing on this bone and it has held up super well. It has no smell but understand she can taste the flavor of it. I love having something she can chew on that is safe for her that she enjoys. Great value.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 10, 2026
★★★★★ 5
Durable, Great Value Dog Bone!
We’ve ordered several of these that have lasted for months, and my dogs are still working on them. Months. That alone feels like a small miracle. Normally, chews last about 10 minutes. Not this one. This thing is built like it trained for battle. It keeps them busy, satisfied, and focused on something that is actually meant to be chewed.
And the best part? It’s way more affordable in the long run. Instead of constantly buying new toys, chews, or replacing destroyed shoes, this one just keeps going. Definitely worth every penny and then some.
If you have determined chewers, this is the chew/bone you’ve been looking for.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 18, 2026
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