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Description
PolyScience 20 Liter Stainless Steel Open Bath SystemsOverview An economical alternative to integrated heating baths for liquid temperature up to +150C. Controller bridge rests securely on the deep drawn stainless steel reservoir, yet is easily removed for tank cleaning. Generous bath opening provides ready access to samples and the included bath cover improves stability. Features Working temperatures from ambient +10 up to 150C (MX Controller up to 135C) Advanced Programmable, Advanced Digital or MX
Overview
An economical alternative to integrated heating baths for liquid temperature up to +150°C. Controller bridge rests securely on the deep drawn stainless steel reservoir, yet is easily removed for tank cleaning. Generous bath opening provides ready access to samples and the included bath cover improves stability.
Features
- Working temperatures from ambient +10° up to 150°C (MX Controller up to 135°C)
- Advanced Programmable, Advanced Digital or MX Temperature Controller
- 6, 10, 20 or 28 liter reservoir
- DuraTop™ Chemical Resistant Bridge, Swivel 180™ Rotating Controller (on Advanced Programmable and Advanced Digital models)
- Lidded opening for optional cooling coil
- External circulation capability
- Complies with DIN 12876-1 Class I safety requirements for use with non-flammable liquids
- Includes bath cover
Controllers
Specifications and features for the PolyScience Stainless Steel Open Bath Systems 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 | Advanced Digital | Economy MX | |
| Temp. Range (°C) | Ambient +10°C to 150°C | Ambient +10°C to 150°C | Ambient +10°C to 135C |
| Temp. Stability | ±0.01°C | ±0.01°C | ±0.07°C |
| External Temp. Control | Yes (probe not included) | Yes (probe not included) | No |
| Pump | Pressure/Suction, Variable-Speed | Pressure/Suction, Variable-Speed | Pressure only, 1-speed |
| Programmability | Ten 100-step programs | N/A | N/A |
| External Circulation | Open or closed loop | Open or closed loop | Closed loop |
| Safety Rating* | DIN 12876-1 Class III | DIN 12876-1 Class III | DIN 12876-1 Class I |
*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.
Advanced Programmable Features
- Time/temperature programming (ten 100-step programs)
- Intuitive 4.3” (10.9 cm) SmartTouch™ display
- 6 languages: French, German, Spanish, Chinese, Arabic, English
- Variable speed pump with open- and closed-loop external circulation capability
- Swivel 180™ Rotating Controller
- On-board connectivity: USB-A & B, Ethernet, RS232/485, 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
- 5-point calibration capability
Advanced Digital Features
- 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, RS232/485, and external temperature probe
- On-screen prompts
- Automatic performance optimization and specific heat tuning
- Single-point calibration capability
Economy MX Features
- Large, universal icon and English display
- On-screen prompts
- Single-point calibration capability
Please note: PolyScience circulating baths are manufactured at the time the order is placed and have a 2-3 week lead time.
Key Attributes
| Incubation | Yes |
| Refrigeration | Accessory |
| Temp Range (°C) | Ambient +10 to 150 |
| Capacity (L) | 20 |
| Circulation | Internal & External |
| Brand | PolyScience |
| MaxFlow Rate (l/min) | 20.1, 13.5 |
| Temp Stability (°C) | ±0.01, ±0.07 |
| Timer | Yes |
| Alarms | Yes |
| Digital or Mechanical | Digital |
| Data connection | Yes |
| Tank Material | Stainless Steel |
| Sample Agitation | No |
| Media Racks Available | Yes |
| Warranty (years) | 2 |
| Weight (lb) | 60 |
| Width (in) | 20.9 |
| Depth (in) | 13.5 |
| Height (in) | 14.9 |
Manufacturer specifications:
Controller |
Advanced Programmable |
Advanced Digital |
Economy MX |
Sku Number |
AP20S150-A11B |
AD20S150-A11B |
MX20S135-A11B |
Working Temperature Range °C |
Ambient +10° to 150° |
Ambient +10° to 150° |
Ambient +10° to 135° |
Reservoir Capacity (liters) |
20 |
20 |
20 |
Reservoir/Tank Material |
Stainless Steel |
Stainless Steel |
Stainless Steel |
Reservoir Cover |
Included |
Included |
Included |
DuraTop |
Yes |
Yes |
Yes |
Working Access (L x W x D) (inches) |
10.4 x 9 x 6 in |
10.4 x 9 x 6 in |
10.4 x 9 x 6 in |
Temperature Stability °C |
±0.01° |
±0.01° |
±0.07° |
Display |
4.3" SmartTouch Touchscreen |
3.75" Touch-Pad LCD |
3.25" LCD |
Display Resolution (Set) |
0.01 |
0.01 |
0.1 |
Display Resolution (Read) |
0.001 |
0.01 |
0.1 |
Pump Type |
Pressure/Suction |
Pressure/Suction |
Pressure |
Pump Speed |
Variable |
Variable |
One |
Process Connections |
1/4" (F) NPT |
1/4" (F) NPT |
1/2" O.D. Barbed Tubes |
External Temperature Control Capability |
Yes |
Yes |
N/A |
Flammability Class (DIN 12876-1) |
I (NFL) |
I (NFL) |
I (NFL) |
Over-Temperature Protection / Failsafe Heater Control |
Yes |
Yes |
Yes |
Low Liquid Level Protection |
Yes |
Yes |
Yes |
Cooling Coil |
Accessory |
Accessory |
Accessory |
Included Software |
PolyTemp, TDMS file, USB driver, Time/Temp Program Generator, PolyTemp Remote iPhone app |
PolyTemp Viewer, USB driver |
N/A |
Maximum Ambient Temperature °C |
35° |
35° |
35° |
Overall Dimensions (L x W x H) (inches) |
20.9 x 13.5 x 14.9 in |
20.9 x 13.5 x 14.9 in |
20.9 x 13.5 x 16 in |
Environmental Compliance |
RoHS, WEEE |
RoHS, WEEE |
RoHS, WEEE |
Shipping Weight (pounds) |
60 |
60 |
54 |
Maximum Pressure (psi) |
4.3 |
4.3 |
2.3 |
Maximum Pressure Flow Rate (l/min) |
20.1 |
20.1 |
13.5 |
Maximum Suction Flow Rate (l/min) |
14.7 |
14.7 |
N/A |
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 |
Heater Wattage |
1100 |
1100 |
1100 |
Electrical Requirements (VAC/Hz/Ph/A) |
120/60/1/10 |
120/60/1/10 |
120/60/1/10 |
Regulatory Approvals |
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 Liter Stainless Steel Open Bath Systems capable of this?
That depends on the controller used. Only the Advanced Programmable controller 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
4.1 ★★★★★
Based on 27 reviews
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Product Reviews
★★★★★ 5
Best for all chewers!
Color: Purple, Color: Purple
I purchased in February and waited until ive had them long enough to make a justified review. I have a very VERY aggressive chewer. He destroys every toy he gets within minutes or a hour. We didnt expect much out of these but why not. Let me tell you... they only have small teeth dents. No cracks, no breaks, no chunks missing, none in the trash, no bleeding gums... nothing. My chewer loves them. First day he just stared at them like they were alien objects but after we played fetch a few times it was on!! Now all three dogs chewer on them. I would say im purchasing again but I dont know when that will be lol I highly recommend to anyone!! Photo is taken today 6/4/26
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Reviewed in the United States on June 4, 2026
★★★★★ 4
My pit bull loves them.
Color: Purple
I picked up the Frienhund Tough Dog Toys 3-pack for my large, heavy chewer, and overall I’m pretty impressed. Right out of the box, the toys feel solid and well-made—definitely more durable than your average chew toy. My dog usually destroys new toys within a day or two, but these have held up significantly longer, which is a big win.
They also do a great job of keeping him occupied. The shapes and textures seem to keep his interest, and I’ve noticed less destructive chewing on furniture since introducing these. That alone makes them worth it.
The only reason I’m giving 4 instead of 5 stars is that while they’re very tough, they’re not completely “indestructible” (despite the claim). After a couple of weeks of heavy use, there are some visible wear marks. Still, compared to most other toys we’ve tried, these last much longer.
Overall, a great option for medium to large dogs that are aggressive chewers—durable, engaging, and a solid value for a 3-pack.
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Reviewed in the United States on April 17, 2026
★★★★★ 5
Great Toys for Chewers
Color: Purple
Love these dog toys, they are so well-made and keep my Golden Retriever busy for hours. The variety of sizes is nice too, they aren’t heavy at all, but they sure hold their shapes , even with the constant chewing. The price was very reasonable, too.
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Reviewed in the United States on June 7, 2026
★★★★★ 5
Grateful for chewers!
Color: Purple
Very tough very durable. I have two dogs and they are still not into pieces so really good quality good value for your money.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 10, 2026
★★★★★ 4
Great product
Color: Purple, Color: Purple
My dogs loved these toys. Durable and apparently very coveted as my puppers “argued” over who got each one. Kept them playing and chewing for hours. Giving only 4 stars instead because I Wish the size was bigger because I have found that sometimes I don’t see it and stepping on it is Absolutely NO FUN.
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Reviewed in the United States on April 12, 2026