Inactivation vs Kill
Before the development of Sterilray™, all UVC lamps produce a specific wavelength of 253.7 nanometers (commonly called 254nm). The UVC band contains wavelengths called “Germicidal” because they alter or flip a microorganism’s DNA so that it can no longer reproduce. The photon energy penetrates the outer structure of the cell and alters the DNA molecule to form dimers. This process of DNA modification is called deactivation. However, under certain conditions, dimers produced by 254 wavelengths can flip back and the pathogens can start to replicate.
Sterilray produces a wavelength in the FUV band with much more photon energy. This additional energy breaks either the protein peptide bonds or the disulfide bonds of the DNA totally killing the microorganism.
254nm output of photon energy is measured in microwatt seconds. New 254nm lamps will produce UV energy in the range of 500 microwatts per square centimeter. A 254nm lamp close to a surface would need more than 100 seconds to “deactivate” pathogens. This output will slowly deteriorate over a one year period and is affected by the number of start cycles.
Sterilray’s photon effectiveness is nearly 10,000 times greater. This increase in effectiveness translates to faster action times making it possible to kill pathogens in less than one second! The Sterilray™ lamp remains efficient for more than one year.
Moving air, especially below 77°F (25°C) has an adverse effect on the 254nm light tubes performance. To compensate, additional lamps are installed and change out cycles are accelerated. The output and stability of standard UVC lamps are drastically reduced in the presence of cold and/or moving air.
Sterilray does not use cathodes and is therefore not affected by temperature or humidity. Sterilray™ is RF excited so it can be turned instantly on and off hundreds of times without affecting the lamp life.
Even the so called high-output ultraviolet germicidal devices produce relatively low amounts of photon energy. Standard 254nm lamps only have one power setting and can not be changed.
Sterilray’s ability to change power is a major benefit. The Far-UV Sterilray™ Disinfection Wand has three power settings:
Smooth—for sanitizing smooth hard surfaces or low level disinfection.
Textured—for sanitizing textured surfaces such as bedspreads or where a higher level of disinfection is required.
Deodorize—will produce a low level of Ozone directly on the surface to deodorize that specific area and produce the highest level of disinfection when required.
Sterilray’s high power is primarily used for oxidation of surfaces. This is the power setting of the lamp that will destroy chemicals and odors such as cigarette smoke, VOC’s, diesel fumes and formaldehyde. Ozone (O3) is a colorless gas with a distinct, pungent odor. It is a molecule made up of 3 atoms of oxygen. It is three thousand times more potent than chlorine in destroying bacteria and viruses.
Benefits of Ozone
Once generated, ozone is quite unstable, one of the three oxygen atoms eagerly splits off the molecule and attaches itself to any particle or pollutant with which it comes in contact. That single oxygen atom from the ozone air purifier proceeds to “oxidize” that particle. As a result, the particle will no longer be toxic, and will no longer be able to reproduce, if it is biological. When the single oxygen (O1) molecule oxidizes the particle, it too is destroyed. The Food and Drug Administration (FDA) requires ozone output of indoor medical devices to be no more than 0.05 ppm (parts per million). Sterilray™ applies ozone directly on the surface—only the area directly below the disinfection wand has any measurable ozone. This dissipates within seconds so no residual ozone remains present in the room or treated area and is always well below the .05 ppm requirement.