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  USP 645 Stage 1
 Log #20 Electrode Application Note
 Water conductivity is used as a measure of water purity in the pharmaceutical industry. Three stages of testing are described in USP 645, each more involved than the last. If the requirements of Stage 1 or Stage 2 are met, the water meets the requirements of the test. Only if the water fails to pass all three Stages is the sample judged noncompliant.

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   Products used for this Application
  Product #   Product Name   Image  
 -  Orion 8102BN ROSSĀ® Combination pH Electrode      Select
 -  pH Buffer Bottles      Select
 -  Conductivity Standards, Solutions and Accessories      Select
 -  Orion 2-Electrode Conductivity Cells      Select
 -  Orion 5-Star Plus Benchtop Multimeter      Select
 -  Orion Star Series Meter Accessories      Select
 1010007  Orion Star Navigator 21      Select