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- USA
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Ships within 48 hours · Estimated delivery Jul 14 - Jul 19
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Description
PolyScience Non-Refrigerated Recirculating CoolersOverview Quiet, energy efficient heat removal. Available in both Liquid to Air models, PolyScience Recirculating Coolers deliver extremely quiet and energy efficient heat removal. They provide significant cooling for set points above ambient, without the energy consumption of refrigerated chillers. Liquid to Air Cooling Uses ambient air to cool your application. Heated process fluid is pumped through the unit's fan cooled heat exchanger and returned
Overview
Quiet, energy-efficient heat removal. Available in both Liquid-to-Air models, PolyScience Recirculating Coolers deliver extremely quiet and energy-efficient heat removal. They provide significant cooling for set-points above ambient, without the energy consumption of refrigerated chillers.
Liquid-to-Air Cooling
Uses ambient air to cool your application. Heated process fluid is pumped through the unit's fan-cooled heat exchanger and returned to the process.
Liquid-to-Air Cooler Specifications
- Working Temperature Range: Ambient +5° to 70°C
- Maximum Fluid Temperature: 70°C
- Cooling Capacity: 4000 watts based on 24°C Δ T (water)
- An economical solution for applications where cooling fluid temperature is higher than ambient and temperature control is not required
- Quiet liquid-to-air cooling
- Positive displacement or turbine pump
- Built-in low liquid level indicator
Please note: PolyScience chillers are manufactured at the time the order is placed and have a 2-3 week lead time.
Key Attributes
| Type | Chillers |
| Incubation | No |
| Refrigeration | Yes |
| Temp Range (°C) | Ambient to 70 |
| Capacity (L) | |
| Circulation | External Only |
| Brand | PolyScience |
| MaxFlow Rate (l/min) | 8.1, 20.5 |
| Temp Stability (°C) | ±0.4°C |
| Timer | No |
| Alarms | Yes |
| Digital or Mechanical | Digital |
| Data connection | No |
| Tank Material | N/A |
| Sample Agitation | No |
| Media Racks Available | No |
| Warranty (years) | 2 |
| Weight (lb) | 132 |
| Width (in) | 15 |
| Depth (in) | 20.5 |
| Height (in) | 22.4 |
Manufacturer Specifications
Liquid-to-Air
| Pump | 1/3 HP Positive Displacement | 1/3 HP Turbine Pump |
| Temperature Range | Ambient to 70°C | |
| Cooling Capacity @ 20°C (W) | 500 based on 3°C ΔT 1000 based on 6°C ΔT 2000 based on 12°C ΔT 3000 based on 18°C ΔT 4000 based on 24°C ΔT |
|
| Power Requirements (V/Hz) | 120/60 | |
| Maximum Pressure psi (bar) | 100 (6.9) | 62 (4.3) |
| Maximum Flow gpm (l/min) | 2.4 (9.1) | 5.4 (20.5) |
Liquid-to-Liquid (No longer available)
| Pump | Turbine Pump |
| Temperature Range | Facility Water +10° to 60°C |
| Cooling Capacity (W/BTU) | 15,000 / 52,855 based on 15°C ΔT 10,000 / 34,100 based on 10°C ΔT 4,500 / 5,345 based on 5°C ΔT |
| Power Requirements (VAC/Hz) | 200-240 / 50-60 (plug for 230V) |
| Maximum Pressure psi (bar) | 100 (6.9) |
| Maximum Flow gpm (l/min) | 3.5 (13.2) |
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
4.3 ★★★★★
Based on 1372 reviews
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Product Reviews
★★★★★ 5
Great Purchase!
Color: White Combo Beam, Color: White Combo Beam
Love these lights! Switch and wiring harness is really nice! Lights aren’t too bright but definitely add a nice touch to a motorcycle.
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Reviewed in the United States on December 6, 2023
★★★★★ 3
Leaky but still working
Color: White Combo Beam, Color: White Combo Beam
I want to love them but they have started leaking after about 2 weeks. They are very bright, really nice throw, I like the low high function. One very mild desert rain in Utah - the next day one of the 2 is all fogged up. Maybe I just got a bad one? Install was a breeze, the unit is all in one with button switches included. I find the water leak to be pretty unacceptable this early on though, pretty disappointed ☹️
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Reviewed in the United States on May 14, 2024
★★★★★ 5
Super bu
Color: White Combo Beam
Very good lights
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Reviewed in the United States on November 22, 2021
★★★★★ 5
THE BEST SPEAKERS
Size: Pair, Size: Pair
These speakers are the best sounding bookshelf speakers i ever saw or heard. The sound from them is clear even from a cheap crosley suitcase record player and the bass is just awesome because you can actually hear it and it ties my songs together when i can actually hear the baseline. They work extremely well independent of a separate subwoofer because the bass is very strong!
Another point of praise is that the decibel count is very high at 93 which means on very low power they perform loudly. Even on low volume from my Aiyima A07 Premium amplifier, they can be heard throughout my house.
They look so cool and appear to be very high quality build and strength. They can be used for whatever you want (provided your amp is compliant) they're super easy to set up because all you do you just attach the sticky rubber feet on the bottoms and the grilles are magnetic for whatever aesthetics youre going for. Definitely worth the money (i bought them on sale for $230) very top notch speakers!
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Reviewed in the United States on April 25, 2026
★★★★★ 5
Very good speakers
Size: Pair
The r51ms are used to compliment my klipsch rp500m speakers and a 12 inch subwoofer in a large living room. By placing the r51m speakers to the outside walls , and the rp500m speakers to the interior, closer to the amplifier, and with the subwoofer set on deep bass only at just enough volume to barely compliment the sound, the large living room is more than sufficiently covered with at least true high fi quality sound, if not true budget audiophile sound. My entire 2.1 system is all klipsch. That's how I want it.
I am using them with a high powered tube amplifier, so presence and clarity is awesome. Placement is critical. I was initially disappointed until I switched the r51ms to the spread to the outside walls position, and the rp500ms to the interior, closer to the amplifier. The difference was remarkable. The 2 different klipsch speakers, ie one a rp and the other a r series blend together perfectly with no clash whatsoever because of somewhat more refined sound on the rp500m speakers. The rp500m speakers do sound higher end , but they are supposed to, but with the speakers as outer r51m and inner rp500m, and the klipsch subwoofer at deep bass with just a touch of volume the result is sound of such quality that I can honestly say I can be content and satisfied with it. I can say my system is complete, and no further improvement, upgrades are needed. Tower speakers as primaries are not necessary because of the high quality of sound and the high sensitivity of the 4 klipsch bookshelf speakers and klipsch subwoofer. This saves me money during this rapid inflation period of time. I could easily say that what I have sounds more than good enough to be satisfied and content with without any desire to upgrade further at this point.
Shipping speed was excellent via Amazon itself, and the box and speakers arrived in handled with care and new condition.
I am not disappointed at all now that the r51m speakers are the outside speakers, spread apart from corner wall to wall to compliment the interior placements of my rp500m speakers by klipsch. Im all klipsch here and I love it. 5 stars categorically. As previously stated, I see no need for primary tower speakers, even in a large living room, and that equals high quality sound and savings of money at the same time. I recommend these speakers. They do more than just do sound quality wise.
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Reviewed in the United States on August 22, 2025