Sunlight meter for measuring harmful ultraviolet solar light radiations portable uv intensity meter uv sun light strength tester handheld digital uv index sensor by sunknown. The j 221 meter measures the irradiance of uv lights. The uv a digital light meter is a compact rugged easy to operate multi function uv meter proven to be highly effective for measuring and calibrating uv a light sources used in fluorescent magnetic particle and liquid penetrant ndt inspections.
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