- High-quality germicidal globes emitting 254nm wavelength
(UVC) ultraviolet radiation.
- Automatic dosing timer with audio and visual indication.
- A two-step process to help the user ensure both sides of items are sterilized.
- Front-loading door with safety switch and door-open detector.
- Mains failure and door-open detection auto-restarts sterilizing cycles.
- Globe failure detection.
- Mains supply fuse.
- Visual inspection window.
- Microprocessor-based solid-state electronics.
- Desktop mounting with scratch-resistant rubber mounts.
- wood-grain finish.
- Brushed-metal handles and doorknob.
How is UVC produced?
Most germicidal light bulbs look like linear fluorescent light bulbs:
They have the same shape
They share similar base types
Both use low-pressure mercury arc technology
They both have a hot cathode and cold cathode lamp types
And both produce the same ultraviolet radiation inside the bulb
However, germicidal light bulbs can’t usually be found in general home improvement stores, where fluorescent bulbs are easily found. And those linear fluorescent tubes are sold by the case and can be found by the dozens in just one room, while germicidal lamps are usually sold one-off for a much higher price and you almost never see them.
So what’s the difference? Glass Coating.
The fluorescent bulb is coated on the inside with a phosphor which converts ultraviolet to visible light. The germicidal bulb is clear and it is made of special glass which transmits the primarily UVC radiation generated by the arc.
Because the glass of germicidal bulbs is clear and designed to allow powerful ultraviolet radiation to pass through it, users of these bulbs must be much more careful to avoid looking directly at them compared to fluorescent bulbs which block most of the UV.
PurpleRay sterilizers only use professional, UVC wavelength, germicidal globes for irradiation.