Surface disinfection

         

Offering safety for
everyhing you toutch

We have always touched objects such as hand rails on trains, elevator buttons and shopping carts but awareness is growing of the risks from the objects that other people have touched in public spaces together with the spreading infection from the new coronavirus. Stanley Electric will continue to pursue the possibilities to offer a safe environment through UV-C technologies.

Surface disinfection (direct irradiation)

表面除菌(直射型)
表面除菌(直射型)

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Basic structure of surface disinfection

Surface disinfection is directly irradiating the surface of an object with UV-C. In comparison to water and air disinfection, it is expected that surface disinfection will cover a wide range of objects such as door knobs, smartphones, computer keyboards and tables.

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Irradiation simulation

The effect of disinfecting surfaces is determined by the distance from the light source and the irradiation time when the light output power is the same. Stanley Electric will offer UV light sources that meet the customer's needs, usage conditions and purpose after conducting irradiation simulations considering factors such as the UV light source type, quantity, installed location, and the deterioration of irradiated parts and materials.

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Irradiation characteristics for a single light source

Extensive support from simple calculations to simulations using light source data

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Irradiation characteristics when combining multiple light sources

Intensity distribution depending on the light source locations

Disinfection effect

The closer from UV-C light source, the more intensity, then to obtain the same disinfection effect for objects at different distances from the light source, the required time to irradiate ultraviolet changes. [Fig.1] and [Fig.2] each show the time required for disinfection and the intensity by distance, when using one LED and three LEDs respectively at 265 nm/50 mW to disinfect 99% of the new coronavirus.

Fig.1: Change in disinfection time by distance

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Fig.2: Comparison of intensity by distance from the UV-C LEDs

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UV-C products TOP