The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support Mechanical, is soliciting proposals for the procurement of Nitrate Ion Selective Electrodes (ISE). This procurement is aimed at acquiring commercial products that are essential for chemical analysis instruments, particularly in measuring and testing electrical signals. The selected contractor will be responsible for providing the required items, which are critical for various defense applications, with a focus on quality assurance and compliance with specified technical requirements. Proposals must be submitted by the extended deadline of October 31, 2025, and interested parties can direct inquiries to Trevor Allander at 564-230-2182 or via email at TREVOR.L.ALLANDER.CIV@US.NAVY.MIL.