UV Intensity Meter Measuring Principle and UV Intensity Unit
The principle of the UV Intensity Meter is the principle of photoelectric conversion. At present, the LS125 UV Intensity Meter can switch the UV intensity unit, and different probes have different alternative units.
An UV Intensity Meter is an instrument used to test the intensity of ultraviolet radiation. What is its working principle?
UV Intensity Meter usually consist of a selenium photocell or a silicon photocell and a microampere meter. A photovoltaic cell is a photovoltaic element that converts light energy directly into electrical energy. When light strikes the sensor surface, the incident light passes through the metal film to reach the interface between the semiconductor selenium layer and the metal film, producing a photoelectric effect at the interface. The magnitude of the generated potential difference is proportional to the illuminance on the light-receiving surface of the photocell. After reading the voltage value, the CPU calculates the irradiance of the ultraviolet ray according to a certain ratio, and displays the data on the screen.
At present, the LS125 UV Intensity Meter can switch the UV intensity unit. Different probes have different alternative units. The alternative units for the 9 probes are as follows:
1. UVC, UVCLED, UVC-WP, UVB, UVA-X1, UVALED-X3:
uW/ cm2 (default), mW/cm2, W/m2
2. UVALED, UVALED-X1:
mW/ cm2 (default), W/cm2, W/m2
mW/ cm2 (default), W/m2
The LS125 UV Intensity Meter can switch UV intensity units according to different industries and different testing needs. So what is the conversion between these units? The formula for converting several UV intensity units is as follows:
1W/m2=1000 mW/m2 = 1,000,000 uW/m2
=1W/10000 cm2=0.0001 W/cm2
=1000 mW/10000 cm2 = 0.1 mW/cm2
=1,000,000 uW/10000 cm2=100 uW/cm2