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Thornton 5-Range Purity LightThis 5-range purity indicator is deignated to monitor DI water quality. It featuers a highly visible LED indicator that changes from Green to Red when the water quality falls below the selected cutoff points of 50K, 200K, 500K, 1 Meg or 2 Meg ohms/cm. Low voltage 6 VAC operation with transformer.
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