510(k) · Cleared
ClearedInfrared Forehead Thermometer, Infrared Ear/Forehead Thermometer
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Joytech Healthcare Co., Ltd. · FLL Continuous Measurement Thermometer
Cleared on Oct 29, 2018 as substantially equivalent to K121428 (Radiant Innovation, Inc., 2012) and 1 other predicate after a 172-day review. Its family tree reaches back 6 generations to 2001. 3 later devices descend from it.
- Decided
- Oct 29, 2018
- Review
- 172 days
- Class
- Class II
- Product code
- FLL
- Recalls
- None
- Predicates
- 2
Its longest line of descent runs back 6 generations to K011059 (2001). 10 ancestors in all, the oldest K011291 (2001). 3 later devices descend from it, 1 citing it directly.
- Root · 6 generations backK011059 Infared Ear Thermometer, Model TH8 SeriesRadiant Innovation, Inc. · 2001
- 5 generations backK030324 Radiant Innovation Inc. Infrared Ear Thermometer, Models TH1 SeriesRadiant Innovation, Inc. · 2003
- 4 generations backK040377 Rii Infrared Ear Thermometer, Models Thxxn SeriesRadiant Innovation, Inc. · 2004
- 3 generations backK051269 Rii Infrared Ear Thermometer, Models TH00XY SeriesRadiant Innovation, Inc. · 2005
- 2 generations backK063185 Rii Infrared Ear Thermometer, Models TH5XY SeriesRadiant Innovation, Inc. · 2006
- 1 generation backK162083 RII Multi-function Infrared Thermometer, Model TH52ZRadiant Innovation, Inc. · 2017
- This deviceK181239 Infrared Forehead Thermometer, Infrared Ear/Forehead ThermometerJoytech Healthcare Co., Ltd. · 2018
- Descendant · cites it directly · 2 of its ownK190873 Infrared Ear/Forehead ThermometerJoytech Healthcare Co., Ltd. · 2019
- Descendant · 2 generations on · 0 of its ownK220276 Infrared Thermometer TET-351Truly Instrument Limited · 2023
- Descendant · 2 generations on · 0 of its ownK202481 ThermArt (Model IR-EFT)Comper Chuangxiang (Beijing) Technology Co., Ltd. · 2021
Most influential descendants
Showing 3 of 3 · See all- K190873Infrared Ear/Forehead ThermometerJoytech Healthcare Co., Ltd. · 2019 · cites it directly2descendants
- K220276Infrared Thermometer TET-351Truly Instrument Limited · 2023 · 2 generations on0descendants
- K202481ThermArt (Model IR-EFT)Comper Chuangxiang (Beijing) Technology Co., Ltd. · 2021 · 2 generations on0descendants
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −6 | K011059 | Infared Ear Thermometer, Model TH8 Series | Radiant Innovation, Inc. | 2001 | — |
| −5 | K030324 | Radiant Innovation Inc. Infrared Ear Thermometer, Models TH1 Series | Radiant Innovation, Inc. | 2003 | — |
| −4 | K040377 | Rii Infrared Ear Thermometer, Models Thxxn Series | Radiant Innovation, Inc. | 2004 | — |
| −3 | K051269 | Rii Infrared Ear Thermometer, Models TH00XY Series | Radiant Innovation, Inc. | 2005 | — |
| −2 | K063185 | Rii Infrared Ear Thermometer, Models TH5XY Series | Radiant Innovation, Inc. | 2006 | — |
| −1 | K162083 | RII Multi-function Infrared Thermometer, Model TH52Z | Radiant Innovation, Inc. | 2017 | — |
| 0 (this device) | K181239 | Infrared Forehead Thermometer, Infrared Ear/Forehead Thermometer | Joytech Healthcare Co., Ltd. | 2018 | — |
| +1 | K190873 | Infrared Ear/Forehead Thermometer | Joytech Healthcare Co., Ltd. | 2019 | — |
| +2 | K220276 | Infrared Thermometer TET-351 | Truly Instrument Limited | 2023 | — |
| +2 | K202481 | ThermArt (Model IR-EFT) | Comper Chuangxiang (Beijing) Technology Co., Ltd. | 2021 | — |
Other ancestors by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2001 | 1 | 0 |
| 2004 | 1 | 0 |
| 2007 | 1 | 0 |
| 2012 | 1 | 0 |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2019 | 1 | 0 |
| 2021 | 1 | 0 |
| 2023 | 1 | 0 |
Sources: FDA 510(k) database (decision fields), the FDA summary (predicates and indications), FDA recall and enforcement reports, and MAUDE; processed by 510(k) Report. Verify on FDA.gov · Methodology and accuracy.
Planning a device in FLL? A 510(k) Report weighs predicate choices, recall history and review times for a new device like this one.
Top candidate predicates for a new FLL device
- #1 K191829 Microlife Non-Contact Infrared Forehead…score 26.7 · 4 generations · no Class I recall
- #2 Held for the reportin the report
- #3 Held for the reportin the report
What was it cleared against? (2)
Devices the submitter claimed this one is substantially equivalent to (*), and reference devices cited for a specific test or feature (†), as written in the FDA summary.
| Type | Number | Device | Decided |
|---|---|---|---|
| * | K121428 | Non-Contact Clinical ThermometerSummary page 4…LL Device Class: II Panel: 80 Regulation number:880.2910 5. Predicate Device Information: Non-contact Clinical Thermometer,Model THB0F(Radiant Innovation Inc,K121428) 1 RII Multi-function Infrared Thermometer, Model TH52Z. (Radiant Inno… | 2012 |
| * | K162083 | RII Multi-function Infrared Thermometer, Model TH52ZSummary page 5…iant Innovation Inc,K121428) 1 RII Multi-function Infrared Thermometer, Model TH52Z. (Radiant Innovation Inc, K162083) 6. Intended use / Indication for Use: Infrared Thermometer DET series are intended for the intermittent measurement… | 2017 |
What descends from it? (3)
1 later device cites it directly; ranked here by how many devices descend from each in turn.
| Number | Device | Decided | Descendants |
|---|---|---|---|
| K190873 | Infrared Ear/Forehead Thermometer | 2019 | 2 |
Has anything in its family been recalled? (0 Class I)
No FDA recall names this device.
No ancestor or descendant has a Class I recall.
What does this lineage say?
- The line of descent spans 17 years and passes through 2 companies; a new generation was cleared every 1.6 years on median.
- None of the 10 ancestors has a recall.
- Of its descendants, K190873 (Joytech Healthcare Co., Ltd., 2019) has gone furthest, with 2 descendants of its own.
- 4 other devices also cite its predicate K121428.
How does its category compare?
All FLL devicesFLL Continuous Measurement Thermometer: FDA decisions, review times, recalls and adverse event reports over 20 years. 2018, this device’s year, is highlighted.
FDA decisions per year · FLL
6in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · FLL
131in 2025
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · FLL
1in 2025
Class I (0 since 2007) Class II/III not classified
Adverse event reports per year · FLL
73in 2025
MAUDE reports naming product code FLL, not matched to any one device; reports are not rates.
View these four charts as a table
| Year | Decisions | Median 510(k) review, days | Recalls (Class I) | MAUDE reports |
|---|---|---|---|---|
| 2007 | 15 | 81 | 0 | 4 |
| 2008 | 14 | 59 | 0 | 13 |
| 2009 | 13 | 84 | 0 | 9 |
| 2010 | 24 | 88 | 0 | 9 |
| 2011 | 20 | 113 | 1 | 18 |
| 2012 | 17 | 126 | 0 | 26 |
| 2013 | 14 | 149 | 0 | 16 |
| 2014 | 7 | 199 | 0 | 54 |
| 2015 | 3 | 270 | 1 | 53 |
| 2016 | 22 | 157 | 0 | 58 |
| 2017 | 16 | 174 | 2 | 118 |
| 2018 | 35 | 209 | 1 | 51 |
| 2019 | 22 | 198 | 5 | 52 |
| 2020 | 21 | 194 | 0 | 53 |
| 2021 | 43 | 218 | 0 | 115 |
| 2022 | 24 | 218 | 0 | 142 |
| 2023 | 17 | 295 | 0 | 101 |
| 2024 | 13 | 223 | 0 | 118 |
| 2025 | 6 | 131 | 1 | 73 |
| 2026 | 2 | — | 1 | — |
What is it indicated for?
Infrared Thermometer DET series are intended for the intermittent measurement of human body temperature by people of all ages. The devices are reusable for home use only.
Indications for use as stated in the FDA summary.
https://510kreport.com/device/K181239 · printed Nov 6, 2026
Cite this page
510(k) Report. “K181239: Infrared Forehead Thermometer, Infrared Ear/Forehead Thermometer.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 6, 2026. https://510kreport.com/device/K181239
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Record history
- FDA decision record loaded May 2, 2026
- Summary read Oct 13, 2026 (extraction version 9eaa42aa01ed)
- Lineage and recalls computed Nov 3, 2026
- Page last updated Nov 3, 2026