# K223044: Digital Thermometer (Model QT001)

- Pathway: 510(k) (Traditional)
- Applicant: Shen Zhen Rong Feng Technology Co., Ltd.
- Decided: May 10, 2023 after 223 days
- Product code: FLL (Continuous Measurement Thermometer)
- Device class: 2
- Regulation: 21 CFR 880.2910
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
Longest line of descent: 7 generations back to K902624 (1990). 10 ancestors in all.
1 later device descends from it; 1 cites it directly.
0 of 12 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- K200599: Digital Thermometer, Joytech Healthcare Co., Ltd. (2020) Summary page 5.

## Most influential descendants
- K240109: Medical electronic thermometer (FC01, FC02) (2024), 0 descendants of its own

## Indications for use
The Digital Thermometer QT001 is intended to measure the human body temperature in armpit, orally or rectally, and the device is reusable for clinical or home use on people of all ages.

Source page: https://510kreport.com/device/K223044
Methodology: https://510kreport.com/methodology