The Effect of Ultraviolet Rays on the Human Body
September 3, 2020
When ultraviolet rays are irradiated to the human body, it can promote the synthesis of vitamin D in the human body to prevent rickets. This is the reason why children are often exposed to the sun. Ultraviolet rays also have a bactericidal effect, and wards in hospitals are disinfected by ultraviolet rays. But too strong ultraviolet rays can harm the human body, so pay attention to protection.
The damage of ultraviolet rays to the human body mainly comes from ultraviolet A (UVA) and ultraviolet B (UVB).
It is a kind of ultraviolet light with the highest wavelength, which can penetrate the dermis layer slowly, but can cause one-time blackening, and cause lipid and collagen damage, leading to photoaging of the skin and even skin cancer.
UVB： 290-320 nm
It can stimulate skin keratinocytes, relax blood vessels and increase blood flow. It will become red at the beginning and then slowly turn brown, causing skin burns and erythema. It belongs to medium wave and acts on the surface of the skin with quick results.
UV Weathering Test Chamber is used in tests that incorporate UV light,temperature, condensing humidity, water sprays, and irradiance control. LIB UV-SI-260 chamber is a very economical weathering tester, and widely used in material testing.
Easy to operate-touch screen control
UV series weathering chambers are upgrade to programmable controller and Ethernet access that provides simple operation and control.
Lamp life display
The door of the UV test chamber must be closed tightly during testing. If the lamp fails to light up or decline, the user cannot find it in time. LIB has designed a lamp current display meter to be embedded in the control panel, and the lamp current will be displayed on the meter. If the lamp is faulty, the current will prompt the user to replace the lamp in time.