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[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

Certificate of Analysis

Product Information

Product Category: Membrane

Product Model Number: 2701

Lot Number: 25H100159

Method: Amperometric testing with standards

Test Results

Time of Testing Determination Specification Result
Initial Average calibration sensitivity 10-50 nA 12.35 nA
Average Linearity N/A N/A
Potassium Ferrocyanide interference +/- 1.0 nA 0 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: Sandy Crawford

Date: 8/11/2025

[ISO 9001 Certified Seal] YSI INCORPORATED

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25H100159 Microsoft Word 2021

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