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ABB AWT420 Transmitter and pH Sensors MCERTS Certificate

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This document certifies that the ABB AWT420 Transmitter and 100GP and 500PRO pH sensors (including variants APS121, APS122, APS521, and APS522) comply with Environment Agency performance standards for continuous water monitoring equipment. The certification covers specific pH ranges, software versions, and serial numbers, with field testing conducted at a wastewater treatment plant between November 2020 and February 2021.

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