UV-C Sanitizer Lamp

Overview

A UV-C sanitizer lamp disinfects a room by flooding it with short-wave ultraviolet light. The germicidal output comes from a UV-C Lamp Array of low-pressure mercury tubes that emit at 254 nm, a wavelength absorbed strongly by nucleic acids. Light at that wavelength breaks the DNA and RNA of bacteria, viruses and mould spores so they can no longer reproduce, which is why the lamp inactivates pathogens it never physically touches.

Because UV-C also harms skin and eyes, the lamp is built around keeping people out of its light. A Motion Sensor & Safety Interlock watches for motion and an interlock cuts power the instant the area is entered, while a Timer Control Board enforces an exit delay before the cycle starts. The emitters, Electronic Ballast & Driver and controls sit in a sheet-steel Housing & Reflector on a Base & Stand stand.

How it works

The Electronic Ballast & Driver drives the tubes at high frequency. Its Ballast Transformer steps up the strike voltage to ignite the arc, then the ballast limits and stabilises the current so the tubes run steadily. A reflector in the Housing & Reflector spreads the UV-C across the target zone rather than wasting it on the walls behind the lamp.

Safety is layered. When the operator presses start, the Timer Control Board board's microcontroller sounds the Warning Buzzer and waits out an exit delay before closing the Lamp Relay that powers the array. During the cycle, the PIR Motion Sensor watches for anyone entering; if it trips, or if the Safety Interlock Switch sees the cover or door open, the controller drops the relay and the tubes go dark in milliseconds. When the timed dose completes, the lamp shuts itself off and signals the cycle is done, so a treated room is only re-entered once the UV-C is off.