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Effective May 13th, 2025, YSI has added a 3.5% surcharge for all of their products. The surcharge will appear as a separate line item on the order.
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Description

The YSI pH(5564) and pH/ORP(5565) Probes are for use with the YSI 556 MPS handheld multiparameter meter. These probes require the YSI 5563 cable assembly.