frequently asked questions

UV-C technology

How does disinfection using UV-C work?

Ultraviolet (UV) is electromagnetic radiation that is just outside the area of the light spectrum that is visible to the human eye.

UV-C radiation, with a wavelength ranging from 200 to 280 nanometres, has the most lethal range for micro-organisms. This makes UV-C radiation capable of causing permanent damage to many different undesirable micro-organisms found in water, air or on surfaces. In order for the disinfection process to succeed, each type of micro-organism must be adequately exposed to UV-C radiation. When micro-organisms are directly exposed to the correct intensity of UV-C radiation for long enough the radiation penetrates through the organism’s cell wall. The radiation disrupts the micro-organism’s DNA, so it no longer functions. The reproductive capacity of the micro-organism is damaged or the organism is destroyed entirety.

What value does UV-C add?

Environmentally friendly
UV radiation is environmentally friendly and sterilises without the use of chemicals: toxic chemicals require specialised storage and handling. Since no chemicals are used, overdosing is not possible.

This technology has low initial investment costs and offers reduced operating costs.

Efficient and effective
UV radiation treats water, surface or air immediately and there is no need to have tanks or long retention/lighting times.

UV radiation functions extremely well with other air and water processes, as no changes are made to the taste, smell, pH, conductivity or chemical properties of the air/water in which it is used.

How does UV-C water disinfection work?

Germicidal UV-C systems work by irradiating running water using UV-C light. The lamps are fitted in a treatment chamber, which disinfects the water within a few seconds. 

How does UV-C surface disinfection work?

Germicidal UV-C systems work by irradiating surfaces using UV-C light. The lamps are fitted in a treatment chamber which optimally reflects the light for perfect radiation on the surface.

How does UV-C air disinfection work?

Germicidal UV-C systems work by irradiating flowing air using UV-C light. The lamps are fitted in a treatment chamber, through which the air flows. This air is then disinfected in a few seconds.. 

How much experience do you have with UV?

We have over 35 years of experience using UV-C disinfection. Besides that we are a proud member of the IUVA (International Ultraviolet Association). Our membership ensures that we are kept continuously up to date on the latest developments in the field of UV-C. It allows us to develop and improve our systems using the latest techniques and in keeping with safety and efficiency requirements.

Which UV dose do I need?

The size of the UV-system is determined different factors such as lamp power, estimated results, transmittance of water.

The UV dose is determined based on customer demand and the above factors. The dose is expressed in mJ/cm².

Xclear UV-C systems

Which UV-systems does Xclear offer?

Small ponds < 15.000 L 
Xclear offers 2 different UV systems to safely disinfect small ponds. These units are especially designed to get the best results with a lower amount of water.


Medium ponds < 75.000 L
These Xclear UV products are specially designed for ponds with a volume till 75.000 liters. There are different kind of UV systems within this category to fit the needs of the customer and its pond. From saltwater units, flexible installations units to professional kinds. 


Large ponds > 75.000 L
These Xclear units are especially designed for large ponds and high volumes. The higher the volume the more professional equipment is needed. We offer a range of different products to fit any kind of large pond.


Surface disinfection
Xclear offers a unit that is designed to disinfect surfaces. The shape and the material of the unit is chosen this way to get ultimate reflection of the UV radiation. This creates a wide radiation surface for quick disinfection.


Which UV-systems do I need?

Depending on the area of application and the problem or question, the best UV system for your application is considered. Take a look at our site at the different applications or UV solutions for more information and which UV systems are suitable for your application.

How often should UV-C lamps be replaced?

The average effective life of a UV-C lamp is 9.000 hours but depends on the system. Although the lamp will still continue to work after this period, its disinfecting value will rapidly decline from then on.

General questions

What is Xclear?

Xclear is the general disinfection brand of VGE, excluding professional and swimming pool options.

VGE B.V contains three different disinfection brands: VGE Pro (professional), Blue Lagoon (swimming pool and spa) and Xclear.  and

How do I report a complaint?

Xclear customers can address their complaints to the company or wholesaler where the product was purchased. VGE B.V. as a wholesaler, does not handle complaints from private individuals who have not bought their product directly from VGE.

Wholesalers, web shops, etc. who buy their Xclear products directly at VGE B.V. can contact our back office by email or telephone.

How do I install the UV-C system?

All Xclear systems are provided with a manual that explains in detail how to install the system. The manuals per product can be found on our website.

Is your question not there?

No problem! Please get in contact with us so we can help you with the answer. Send your question or questions in an email and our back office will get back at you.


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