YSI 559 Replacement DO Sensor Module
Replacement DO sensor module for YSI 550A and 556 dissolved oxygen meters
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This product is an accessory for the following products:
The YSI 559 is a replaceable DO sensor for YSI 550A, 556, and 5200 dissolved oxygen meters. The 559 comes with a small allen wrench for the set screw. This sensor is easily replaced in the field in minutes.