# K051699: Sejoy, Model MT-403

- Pathway: 510(k) (Traditional)
- Applicant: Sejoy Electronics & Instruments Co., Ltd.
- Decided: Feb 6, 2006 after 227 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
No predicates in its family tree.
9 later devices descend from it; 1 cites it directly.
0 of 10 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- None. FDA’s file for it is a 510(k) statement, which names no predicate.

## Most influential descendants
- K110776: Digital Thermometer MT Series (2011), 8 descendants of its own
- K153149: Digital Thermometer, Models MT-1027, MT-4127, MT-1032, MT-4132, MT-4333, MT-4326, MT-4726, MT-4335, MT-4735, MT-09, MT-30, MT-31, MT-36 (2016), 7 descendants of its own
- K163518: Digital Thermometer (2017), 6 descendants of its own
- K183393: Digital Thermometer (2019), 4 descendants of its own
- K200599: Digital Thermometer (2020), 2 descendants of its own

## Indications for use
The device model MT-101 is intended to measure the human body temperature in regular mode orally, rectally or under the arm(axillary). The device is reusable for clinical or home use on people of all ages.

Source page: https://510kreport.com/device/K051699
Methodology: https://510kreport.com/methodology