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Extech HD450 Heavy Duty Data Logging Light Meter with PC Interface EXTECH HD 450 P The Extech Lux meter HD450 is suitable to measure the light in working places offices and public buildings By using the precision silicon photodiode and a spectral filter brings precise measuring data with this equipment P P The HD 450 is both robust and double insulated for the field service In addition the device functions as a Data logger that can store up to 16 000 measured values continuously an
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