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Description
PolyScience 28 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
| Type | Stirred / Circulating Baths |
| 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) | 72 |
| Width (in) | 20.9 |
| Depth (in) | 13.5 |
| Height (in) | 16.9 |
Manufacturer Specifications
Controller |
Advanced Programmable |
Advanced Digital |
Economy MX |
Sku Number |
AP28S150-A11B |
AD28S150-A11B |
MX28S135-A11B |
Working Temperature Range °C |
Ambient +10° to 150° |
Ambient +10° to 150° |
Ambient +10° to 135° |
Reservoir Capacity (liters) |
28 |
28 |
28 |
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) |
10.1 x 8.4 x 8 in |
10.1 x 8.4 x 8 in |
10.1 x 8.4 x 8 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 16.9 in |
20.9 x 13.5 x 16.9 in |
20.9 x 13.5 x 18 in |
Environmental Compliance |
RoHS, WEEE |
RoHS, WEEE |
RoHS, WEEE |
Shipping Weight (pounds) |
72 |
72 |
66 |
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 28 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
4.7 ★★★★★
Based on 6 reviews
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Product Reviews
★★★★★ 5
Good racks, 2 slides instead of 1, smooth action
Size: 7.1" - 2 Drawers (3.3" each drawer), Color: Black, Size: 7.1" - 2 Drawers (3.3" each drawer), Color: Black
Pros: 2 sliders instead of just one, smooth action on the slides, slides ‘lock’ into place when retracted
Cons: none for me, other than no option for a single drawer in this size
Needed a wide 2-tier rack to go along with other racks I bought at the same time.
I chose this one primarily because:
- it has 2 sliders, instead of a single one in the middle.
- it’s shorter than others I looked at and I needed to fit some taller items.
- there’s only screws attaching the sliders to the base, which I was going to remove to reduce height.
I really only needed a single 2-tier rack in this size, but it was only offered as a double. Fortunately, the sliders were only affixed to the base with screws and not rivets, so dismantling a single drawer was easy and didn’t require doing any damage.
If you happen to need to do the same, but still have to use the base to clear a lip at the bottom of the cabinet, the metal of the base should be easy to cut in half if you have or have access to the power tools to do so. If you don’t, you could still dismantle 1 rack and just create a new base with some thin wood, then screw both directly to the cabinet.
No complaints, would buy again if it were offered in a single-drawer configuration. Having 2 slides was still definitely a big plus, nonetheless, but I now have half a unit that I don’t necessarily need.
I would note that the sliders don't extend quite as far out as I thought they may, but it's really only ≤1" that I'm talking about and they still extend far enough to vertically pull the rear-most item out, so it's not a biggie, just worth noting.
* I didn’t use the adhesive strip and just threw it away, as I intended to secure it with screws from the beginning. If you’ll be using the base, I’d suggest drilling holes through the base and securing it to the cabinet with screws. The adhesive could well be fine, but it’s asking for trouble to have this loaded with glass and have the adhesive give out. No doubt it would happen when you have 3 things on the stove, the phone is ringing and it was the also week you kinked your back something awful, right?
(Item reviewed: 2 drawer x 3.3")
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 16, 2026
★★★★★ 5
Excellent quality / size.
Size: 7.4" - 3 Drawers (2.2" each drawer), Color: Black
You magnificent SOB! This is an excellent product - it is exactly as advertised, saves space, is well-built and the measurements are spot-on. There is no assembly and the double-sided tape works perfectly to stabilize the unit. Great product and worth the price.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 29, 2026
★★★★★ 5
Great organization!
Size: 7.4" - 3 Drawers (2.2" each drawer), Color: Black
Easy to install, works smoothly and easy to see/access spice bottles. Great organization for spices.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 15, 2026
★★★★★ 4
Nice units
Size: 7.4" - 3 Drawers (2.2" each drawer), Color: Black
Nice way to organize and utilize spices and seasonings. Slides out well. You will have to watch sizes of bottles. Units won't handle taller and wider bottles.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 9, 2025
★★★★★ 5
Sturdy and attractive
Size: 7.4" - 3 Drawers (2.2" each drawer), Color: Black
Very sturdy. Fit my cabinet perfectly. Would love a version that is just one level too. No assembly required. Solid enough that it stays in place without adhesive. Can finally find spices without taking them all out of the cabinet.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 27, 2025
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