Overview of UV Light Meters
Ultraviolet illuminance meter, also known as ultraviolet radiation meter, ultraviolet intensity meter, etc., mainly measures the radiation intensity of ultraviolet rays, and is used in photochemistry, polymer material aging, flaw detection, ultraviolet light source, plant cultivation, large-scale integrated circuit lithography and other fields UV radiation measurement work.
The UV light meter uses 35 different detector heads to measure UVA, UVB, UVC, visible light and infrared light. The measurement wavelength of the ultraviolet light meter is divided into UVA (320nm-380nm), UVB (280nm-320nm), UVC (200nm-280nm), and some products can detect a wide range of bands, humanized operation, small and flexible, can be operated with one hand , the probe is separated from the body, convenient and simple, with automatic memory function, can store 20 sets of data, can be widely used in health, medical, chemical, hygiene, food, electronics, aerospace and other industries, suitable for ultraviolet light, physiotherapy, fluorescence analysis, Measurement of UV irradiance in UV lithography, water treatment, breeding and other fields.
Principle of UV light meter
The ultraviolet illuminance meter is an instrument that specializes in measuring luminosity and brightness. It is to measure the light intensity (illuminance) is the degree to which the object is illuminated, that is, the ratio of the luminous flux obtained on the surface of the object to the illuminated area. An illuminance meter is usually composed of a selenium photocell or a silicon photocell and a microammeter. The principle is: Photovoltaic cells are photoelectric components that directly convert light energy into electrical energy. When the light hits the surface of the selenium photovoltaic cell, the incident light passes through the metal thin film 4 and reaches the interface between the semiconductor selenium layer 2 and the metal thin film 4, generating a photoelectric effect on the interface. The magnitude of the generated potential difference has a certain proportional relationship with the illuminance on the light-receiving surface of the photocell. At this time, if an external circuit is connected, a current will flow, and the current value will be indicated on a microammeter with a scale of lux (Lx). The magnitude of the photocurrent depends on the intensity of the incident light and the resistance in the circuit. The illuminance meter has a shifting device, so it can measure high illuminance or low illuminance.
