The Shield 1000 is a water purification system designed by Puralytics which is useful for removing pathogens (bacteria, virus, protozoa), chemical contaminants (personal care products & pharmaceuticals), herbicides, and pesticides. The technology uses a photocatalytic nanotech fiber mesh to destroy contaminants in water. The Shield aims to improve humanitarian response by enabling access to safe drinking water while reducing water-borne diseases.
The product is produced in batches to meet specific requirements. Interview with representative
Intellectural Property Type
User Provision Model
This product is distributed by Puralytics (or another retailer), humanitarian organizations, governmental agencies, and non-profits to disaster relief and refugee settlements.Interview with representative
Distributions to Date Status
Description of the combined methods
LED and nanotechnology mesh fiber
Manufacturer-specified water treatment rate (L/hr)
Heavy metals and/or arsenic reduction
Yes, reduction rate unknown
Maximum recommended influent turbidity level (NTU)
Effluent turbidity levels (NTU)
Safe water storage capacity (L)
Manufacturer-specified lifetime volume (L)
150,000-340,000 L (Cartridge lifetime)
The patented Puralytics® process employs LEDs to excite a nanotechnology mesh which purifies water following five-step light-activated purification processes. The five-step process includes:
- Photocatalytic Oxidation – eliminates organic compounds
- Photocatalytic Reduction – reduces compounds & heavy metals to a less toxic state
- Photoadsorption – irreversibly adsorbs heavy metals; mercury, lead, chromium, arsenic, etc.
- Photolysis – high energy breaks up chemical compounds to enhance the other processes
- Photodisinfection – high-intensity multiple wavelengths more effective than UV irradiation
- Water recovery: 100%
- Water production: 0.5-2.6 L/min (200–1000 gallons per day)
- Pressure drop: 5–25 psi @ 200-1000 gpd
- Power consumption: 570 Watts
- Power input: 100-240 V; 50 Hz-60 Hz
- Dimensions: 81.3 x 30.5 x 45.7 cm
- Weight: 27.2 kg
- Ambient operating temp: 5°C–30°C (41°F–86°F)
Technical support is provided by Pure Health Water, an authorized dealer of Puralytics. Interview with representative
Some of the replaceable components for Field Shield 1000 includes;
- Ozone cartridge(needs to be changed quarterly)
- UVC (needs annual replacement)
- The catalyst (may need replacing at some long interval dependent on the application)
The LEDs will illuminate with full power for about 3 years. Replacements are only available if the products are shipped back to Puralytics. Interview with representative
Manufacturer Specified Performance Parameters
The designer specified performance targets include: 100% water recovery, removal of emerging contaminants (personal care products & pharmaceuticals), herbicides and pesticides, pathogens (bacteria, virus, protozoa), and industrial chemicals (petrochemicals, toxins) with no chemical consumables, and low generation of waste.
Vetted Performance Status
Once a year maintenance schedule is recommended. The owner's manual provides detailed safety information.
Complementary Technical Systems
Activated carbon filter and ion-exchange technology. Interview with representative
Academic Research and References
Frederickson, J., 2014, Field Shield.
Chen, J. et al., 2003, Application of nano TiO2 towards polluted water treatment combined with electro-photochemical method, Water Research, 37(16), pp.3815-3820.
Laurance, J., 2016, Photocatalytic Treatment of Stormwater Runoff using Puralytics LilyPad.
Dossin Zanrosso, et al., 2020, Solution mixing preparation of PVDF/ZnO polymeric composite films engineered for heterogeneous photocatalysis, Journal of Applied Polymer Science, 137(9), p.48417.
Compliance with regulations
Meets US EPA Guidelines for Microbiological Water Purifiers Pathogen Reductions: Bacteria 99.9999%; Viruses 99.99%; Protozoa (cryptosporidium, giardia) 99.9%