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Description
PRESTO W55 Process SystemOverview The powerful W55 regulates temperatures with high precision and convinces with faster cool down and heat up times. It is ideal for use in large external applications such as reactor temperature control, material stress testing or temperature simulation. Features: For highly precise, external temperature applications Rapid heating and cooling Wide working temperature ranges without changing fluids Highest performance with small footprint Space
Overview
The powerful W55 regulates temperatures with high precision and convinces with faster cool-down and heat-up times. It is ideal for use in large external applications such as reactor temperature control, material stress testing or temperature simulation.
Features:
- For highly precise, external temperature applications
- Rapid heating and cooling
- Wide working temperature ranges without changing fluids
- Highest performance with small footprint
- Space-saving design optimizes space utilization in your lab
- 5,7” industrial color TFT touch screen
- USB connection
- Ethernet
- SD-Card slot
- RS232
- Modbus
- RS485 (Accessory)
- Profibus DP (Accessory)
- Pump pressure up to 3.2 bar, max. flow rate 76 l/min
- Temperature stability ±0.05 °C ... ±0.1 °C
- Second external Pt100 sensor connection (accessory)
Key Attributes
| Type | Circulating |
| Incubation | Yes |
| Refrigeration | Yes |
| Temp Range (°C) | -55 ... +250°C |
| Capacity (L) | N/A |
| Circulation | External Only |
| Brand | Julabo |
| MaxFlow Rate (l/min) | 12 |
| Temp Stability (°C) | ±0.05 to 0.1°C |
| Timer | Yes |
| Alarms | Yes |
| Digital or Mechanical | Digital |
| Data connection | Yes |
| Tank Material | N/A |
| Sample Agitation | No |
| Media Racks Available | No |
| Warranty (years) | 1 |
| Weight (lb) | 635 |
Manufacturer Specifications
| Dimensions | 24 x 33.3 x 49.2 in. |
| Filling volume expansion vessel | 11.5 l |
| Internal usable expansion volume | 7.5 l |
| Minimal process volume | 11.5 l |
| Active heat exchanger volume | 7 l |
| Weight | 634.9 lbs |
| Pump connections | M30x1.5 male |
| Cooling Water Connection | G¾ in. |
| Working temperature range | -55.0 ... +250.0 °C |
| Temperature stability | +/-0.05 ... +/-0.1 °C |
| Setting the resolution of the temperature display | 0.01 °C |
| Temperature display resolution | 0.01 °C |
| Ambient temperature | +5.0 ... +40.0 °C |
| Data based on voltage version: | 230V/3PPE/60Hz (Without Plug) |
| Heating capacity | 15 kW |
| Cooling capacity (Medium: Ethanol) | 200°C/13.5kW | 20°C/15kW | 0°C/10kW | -10°C/6.5 kW | -20°C/4kW | -30°C/2.5kW | -40°C/1.2kW | -50°C/0.3kW |
| Pump capacity flow rate | 35 ... 80 l/min |
| Pump capacity flow pressure | 7 ... 46.4 psi |
| Viscosity max. | 50 cST |
|
Refrigerant stage 1 |
R452A |
| Global Warming Potential for R452A | 2140 |
| Filling volume | 1600 g |
| Carbon dioxide equivalent | 3.424 t |
| Cooling of compressor | 1-stage Water |
| Cooling water pressure max. | 87 ... 79.8 psi |
| Cooling water difference pressure | 7.3 ... 87 psi |
| Cooling water temperature max. | 35 °C |
| 1.0Cooling water consumption | 2 ... 12 l/min |
| Sound pressure level | 65 dbA |
| Classification according to DIN12876-1 | Classification III (FL) |
| IP Code according to IEC 60529 | IP 20 |
| Pump type | Centrifugal Pump (Magnetically coupled) |
| External pt100 sensor connection | integrated |
| 2nd external Pt100 sensor connection | accessory |
| Integrated programmer | 8x60 steps |
| Temperature control | ICC |
| Absolute temperature calibration | 3 Point Calibration |
| Temperature displayTemperature display | 5.7" TFT Touchscreen |
| Temperature settingTemperature setting | Touchscreen |
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
4.6 ★★★★★
Based on 15 reviews
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Product Reviews
★★★★★ 5
Excellent value, flawless performance for well over a year and no signs of quitting.
Color: Green/Black
Excellent value, had this for well over a year and it still keeps perfect time, still water resistant.
No worries about having to change batteries.
Owned a fancy expensive (battery) watch once and the dept. store repair intentionally sabotaged the watch in the hopes I would purchase another from them. Yeah, good luck with that, lost my business forever.
This is the 21st century, cell phones are the new time pieces, but solar is totally reliable and Timex makes it happen.
Holds a charge for many months, although I prop it in a bright window for a few days every few months or so just to make sure the cells are always fully charged, although it's probably unnecessary, just being over cautious. I haven't actually experienced this watch ever running out of power even after months of use. Damn impressive, as it should be.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 12, 2025
★★★★★ 4
Good value for solar watch
Color: Black/Orange
Nice watch! It is plastic like but it is solar. No indiglo button only a little luminous on the hands so you don't want to wear it in tje dark and expect to check the time. 45mm case is good size for my wrist and the band works good also, Not too long not too short. Overall a good watch with no problems
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 6, 2026
★★★★★ 5
Amazing Solar for the price
Color: Black/Orange, Color: Black/Orange
Great watch. Very good visibility. Ligh and feels quality. Easy to swap straps. Same size as my Casio Duro. Highly recommend.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 30, 2026
★★★★★ 1
Do not buy
Color: Green/Black
Do not buy. When I received the watch it did not work and the battery was dead. I bought a new battery and it killed that one as well after about a month.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 18, 2026
★★★★★ 5
Inexpensive doesn’t mean cheap.
Color: Black/Orange
After 10 months, zero complaints. Well, I got rid of the horrible NATO strap 🙄. That’s a personal preference. Easy to swap out to whatever you like. Keeps accurate time meaning it’s the same time. I’m not micro analyzing it and the seconds gained/lost. It has a confident look and feel and makes you feel good when wearing it. Sure it’s not high priced but it’s not cheap. Very comfortable, light and not unincumbered. If this is what you’re looking at, you’d be satisfied. Great looking, durable and simple watch. Full confidence.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 25, 2025
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