YSI 1003 pH/ORP (pH/redox) combination sensor for the Professional Plus instrument.

Easy user-replaceble sensor allows for quick sensor replacements, if needed. No tools necessary. One-year sensor warranty. Measure pH and ORP (oxidation reduction potential), or redox, quickly and easily with the 1003 combination sensor. The 605103 pH/ORP Sensor can be used with the YSI Professional Plus Multiparameter Handheld Instrument. Requires Cable/Probe Assembly. Not compatible with the Pro Series Quatro Cable. Item is heat packed in the winter months. Shipment must be made via 2-day or next day carrier during that time information.