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Extech HD 400 Lux Meter illumination measuring device EXTECH HD 400 P The Lux meter HD400 is suitable to measure the light in working places offices and public buildings The HD400 uses a precision silicon photodiode and a spectral filter gives a precise measurement The HD400 is robust and suitable for all outside weather conditions P Extech HD 400 Light Meter 40 400 000 Lux
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