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Certificate of Analysis

[YSI Logo] YSI Incorporated
Yellow Springs Instrument Co., Yellow Springs, Ohio 45387 USA
Phone 937 767-7241 • 800 765-4974 • Fax 937 767-9353

a xylem brand

Product Information

Product Category: Membrane

Product Model Number: 2702

Lot Number: 25H100368

Method: Amperometric testing with standards

Test Results

Time of Testing	Determination	Specification	Result
Initial	Average calibration sensitivity	10 - 30 nA	11.63 nA
	Average Linearity	23.75 – 26.25 g/L	25.42 g/L
	Potassium Ferrocyanide interference	N/A	N/A
Day	Average calibration sensitivity	N/A	N/A
	Average Linearity	N/A	N/A
	Potassium Ferrocyanide interference	N/A	N/A

The procedures used to manufacture and test this product have been verified by QA for compliance. The electronic signature below is representative of the Chemistry Technician testing and verifying conformity to acceptance criteria.

Completed by: Christy Woodford

Date: 8/20/2025

[ISO 9001 Certified Seal]

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