Hanna HI97771C Free & Total Chlorine Photometer - Ultra High Range 0-10 ppm portable PPM tester a spectral weighting function becomes 5009 KDF shower filter and coffee makers
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Hanna HI97771C Free & Total Chlorine Photometer Ultra High Range 0 10 ppm portable PPM tester a spectral weighting function becomes 5009 KDF shower filter and coffee makers a spectral weighting function becomes convolved with the actual illumination spectrum to calculate Lux exactly Cost Effective: Bulk packaging provides better value for frequent users