Pure water and tap water affect wavelength 250~800 nm The light between them exhibits good transmission characteristics. 5 mm The thickness transmittance is within 80%above. The wavelength is shorter than 250 nm after, Both light absorption rates increase rapidly. Especially tap water '250 nm More intense light absorption. 2. 4cm Attenuation to 70%; 8. 5cm Attenuation to 30%; 16. 3cm Attenuation to 10%.

Further extend the topic based on effective distance, exactly UVC How far does ultraviolet radiation penetrate in water? Everything still returns to the concept of key energy, In water molecules, H-O What is the key energy of a key 485kJ/mol, correspond to 4. 98eV, That's about 249nm. So when testing the transmission spectrum of pure water, The absorption edge began to decrease when measured 249nm left and right. Based on this data, It can be said that normal drinking water has less impurities in tap water, to 275 nmUVC-LED The absorption is not strong, based on UVC The ultraviolet sterilization device based on the principle of sterilization can kill over long distances.

The most important consideration is, It should be the rapid divergence of light during propagation, Causing a sharp decrease in remote intensity. The hemispherical small angle packaging is actually UVA The industry is very common, This also applies to UVC encapsulation, Small angle light emission can make UVC Spread further, Very suitable for cups like water, Long water tank, Manufacturers of flow-through water sterilization devices.

High environmental humidity, to UVC It also did not cause significant absorption, This means that even in the sauna room, It can also be utilized UVC Real time UV sterilization. ?