99%+ kill rate
UV-C breaks the DNA bonds of micro-organisms so bacteria, viruses, parasites and algae spores cannot replicate.
UV Filter
The last line of defense in your RAS — an aquaculture UV sterilizer that destroys the DNA of bacteria, viruses, parasites and algae spores with a 99%+ kill rate, chemical-free and residue-free, so pathogens never recirculate back into your tanks.
- Capacity15–300 m³/h
- UV dose30 mJ/cm² standard
- Kill rate>99%
- ChamberHDPE/PP / SS304 / SS316
ISO 9001 CE OEM / ODM
15+ years in aquaculture engineering · Trusted by Japfa Group, Japan Nissui & Tropo Farms · Shipped worldwide in one container
Product Description
- Seawater, freshwater aquaculture breeding (fish, eels, shrimp, shellfish, etc.) water disinfection.
- Water disinfection in the food processing industry. Including juice, milk, drinks, beer, edible oil, and different kinds of canned food, beverage products, and other water equipment.
- Hospitals, various kinds of laboratory water disinfection, and high levels of pathogen wastewater disinfection.
- Daily life water disinfection including residential areas, office buildings, water plants, hotels and etc.
- Disinfection of biochemical pharmaceutical, cooling water used for cosmetics production.
- Water disinfection of swimming pool, Water entertainment facilities
Advantage:
- To kill various bacteria, viruses, and other microorganisms quickly and effectively
- Through photosynthetic degrade chloride in water effectively
- Easy operation and maintenance;
- The less occupied area can deal with a large amount of water
- No pollution, environmental protection, no produce toxic side effects;
- Low investment costs, low operating costs, easy install
- Designed in a unique wall treatment process by optics principle, to make the cavity maximize the advantage of using UV to improve sterilization effect doubled.
Application
Specifications
Models & configuration
Flow ratings at 30 mJ/cm² dose, integrated from industry practice — final specifications are confirmed by SIGMA's production line per project.
| Model | Capacity | Typical use | Core configuration |
|---|---|---|---|
| SIGMA-UV-15 | 15 m³/h @ 30 mJ/cm² | ||
| SIGMA-UV-50 | 50 m³/h @ 30 mJ/cm² | ||
| SIGMA-UV-100 | 100 m³/h @ 30 mJ/cm² | ||
| SIGMA-UV-150 | 150 m³/h @ 30 mJ/cm² | ||
| SIGMA-UV-200 | 200 m³/h @ 30 mJ/cm² | ||
| SIGMA-UV-300 | 300 m³/h @ 30 mJ/cm² |
| Sterilization rate | >99% — pathogen DNA destruction (bacteria, viruses, parasites, algae spores) |
|---|---|
| UV dose | 30 mJ/cm² standard; higher doses available per species / pathogen |
| Lamps | Low-pressure high-output UVC lamps in quartz sleeves, ~16,000 h lamp life |
| Chamber | HDPE/PP / SS304 / SS316 (316 for saltwater) |
| Flow type | Flow-through inline design — large volumes, small footprint |
| Water type | Freshwater / saltwater |
| Options | Lamp-life monitoring and alerts, PLC integration, wiper cleaning, VFD |
System composition
No chemicals, no by-products
Nothing is dosed and nothing remains in the water — completely safe for the stock.
Reflective inner wall doubles the dose
An optically engineered reflective chamber wall maximises UV exposure, roughly doubling the effective dose.
Flow-through, compact
Treats 15–300 m³/h inline with a small footprint.
Quartz sleeves, easy lamp change
Lamps are protected by quartz sleeves and replaced quickly with minimal downtime.
Fresh- and seawater duty
HDPE/PP or 316 stainless chambers handle both water types.
Beyond the fish farm
The same units serve drinking-water, food & beverage, laboratory, pool and municipal disinfection.
Application
- RAS pathogen control — final disinfection after biological treatment, before water returns to the tanks
- Hatchery and nursery biosecurity, preventing cross-infection at the fry stage
- Quarantine and isolation system disinfection
- Pre-disinfection of intake water for sea- and freshwater farms
- Food & beverage, laboratory, swimming-pool and municipal water disinfection
Video
UV Filter
FAQ
Frequently asked questions
How does a UV sterilizer kill pathogens?
Low-pressure UV-C lamps emit ultraviolet light that breaks the DNA bonds of micro-organisms, so bacteria, viruses and parasites lose the ability to replicate — a sterilization rate of over 99%, with no chemicals added and no toxic by-products.
Where does the UV sterilizer go in a RAS?
It is the final barrier — after mechanical and biological filtration, before the water returns to the tank — keeping pathogens from recirculating back to the fish.
What UV dose does the sterilizer deliver?
A standard dose is around 30 mJ/cm², and a reflective inner-wall treatment maximises UV exposure inside the cavity to roughly double the effective dose; the dose can be increased for specific species or pathogens.
Is the UV unit suitable for seawater?
Yes — the chamber is HDPE/PP or 304/316 stainless steel for fresh- and sea-water duty, with a quartz sleeve protecting each lamp and quick, simple lamp replacement.
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View details →Request a tailored quote
Tell us your species, target density and site — our engineers size the system and reply within one business day.
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