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1187N67: Orion Dual Star pH/ISE benchtop meter pH & ammonia kit with 9512BNWP Orion ammonia ion selective electrode, 8172BNWP ROSS Sure-Flow glass-body pH electrode, 927007MD Orion stainless steel ATC probe, 096019 Orion Star stirrer probe, 951207 Orion 100 ppm ammonia standard (475 mL), 951211...