The working principle of the hot cathode ultraviolet germicidal lamp: by electrically heating the electron powder on the electrode, the electrons bombard the mercury atoms inside the lamp tube, and then generate mercury vapor. When mercury vapor transitions from a low-energy state to a high-energy state, it emits ultraviolet light of a specific wavelength. The working principle of the cold cathode ultraviolet germicidal lamp: supply electrons through field emission or secondary emission, thereby stimulating the energy transition of mercury atoms and releasing ultraviolet light of a specific wavelength. Therefore, from the working principle, the first difference between hot cathode and cold cathode ultraviolet germicidal lamps is: whether they consume electronic powder
There are also differences between the two in appearance, as shown below:
（Hot cathode UV germicidal lamp)
（Cold cathode UV germicidal lamp)
From the above picture, we can see that the hot cathode UV germicidal lamp is larger in size than the cold cathode UV germicidal lamp, and the internal filament is also different.
The third difference is power. The power of hot cathode ultraviolet germicidal lamps ranges from 3W to 800W, and our company can also customize 1000W for customers. The power of cold cathode ultraviolet germicidal lamps ranges from 0.6W to 4W. It can be seen that the power of hot cathode ultraviolet germicidal lamps is greater than that of cold cathode lamps. Due to the high power and ultra-high UV output rate of hot cathode UV germicidal lamps, it can be widely used in commercial or industrial scenarios.
The fourth difference is the average service life. Our company's Lightbest brand hot cathode UV germicidal lamps have an average service life of up to 9,000 hours for standard hot cathode lamps, and the amalgam lamp can even reach 16,000 hours, far exceeding the national standard. Our cold cathode UV germicidal lamps have an average service life of 15,000 hours.
The fifth difference is the difference in earthquake resistance. Since the cold cathode UV germicidal lamp uses a special filament, its shock resistance is better than that of the hot cathode UV germicidal lamp. It can be widely used in vehicles, ships, airplanes, etc. where there may be driving vibrations.
The sixth difference is the matching power supply. Our hot cathode UV germicidal lamps can be connected to either DC 12V or 24V DC ballasts, or AC 110V-240V AC ballasts. Our cold cathode UV germicidal lamps are generally connected to DC inverters.
The above is the difference between hot cathode ultraviolet germicidal lamp and cold cathode ultraviolet germicidal lamp. If you have more information or consultation, please contact us.
Post time: May-11-2024