FDA cleared the GUARDIAN™ Quick Dip Residual Chlorine (5212) from Serim Research on Mar 17, 2026 under K253863, a traditional 510(k). The device falls under product code FKJ, Filter, Blood, Dialysis, regulated at 21 CFR 876.5820 as a Class 2 device. The review panel was Gastroenterology, Urology.

FDA logged the submission as received on Dec 3, 2025. The decision came 104 days later, longer than the 90 FDA-day review goal, which usually means at least one additional information request.

This is the only decision on file for Serim Research in the last 12 months of the tracker.