K152739 · Guangdong Biolight Meditech Co., Ltd. · FLL · Feb 9, 2016 · General Hospital
Device Facts
Record ID
K152739
Device Name
Electronic Thermometer
Applicant
Guangdong Biolight Meditech Co., Ltd.
Product Code
FLL · General Hospital
Decision Date
Feb 9, 2016
Decision
SESE
Submission Type
Traditional
Regulation
21 CFR 880.2910
Device Class
Class 2
Attributes
Pediatric
Indications for Use
Electronic Thermometer is intended for measuring and monitoring human body temperature orally and/or under arm for adult, pediatric and infant. It can be used in healthcare facility and home.
Device Story
Handheld electronic thermometer (models WT1, WT2) measures human body temperature via temperature-sensitive sensor; transmits data via Bluetooth to iOS mobile application 'Temp Sitter' for display. WT1 uses adhesive tape for under-arm monitoring; WT2 uses probe covers for oral/under-arm use. Operated by patients or healthcare providers in home or clinical settings. Output consists of temperature readings displayed on mobile device; assists in monitoring body temperature. Benefits include remote monitoring capability and non-invasive temperature tracking.
Clinical Evidence
No clinical data. Bench testing only, including biocompatibility (ISO 10993-5, ISO 10993-10), electrical safety (IEC 60601-1), EMC (IEC 60601-1-2), and performance testing per ISO 80601-2-56.
Technological Characteristics
Battery-powered handheld device; temperature-sensitive sensor; Bluetooth connectivity to iOS app. Materials: Stainless Steel (S216), Polycarbonate (PC 2458), Silicone, TPE, non-woven cloth, medical melt adhesive. Standards: ISO 10993-5/10, IEC 60601-1, IEC 60601-1-2, ISO 80601-2-56. No display on device; data transmitted to mobile app.
Indications for Use
Indicated for measuring and monitoring human body temperature orally and/or under arm for adult, pediatric, and infant populations in healthcare facilities or home settings.
Regulatory Classification
Identification
A clinical electronic thermometer is a device used to measure the body temperature of a patient by means of a transducer coupled with an electronic signal amplification, conditioning, and display unit. The transducer may be in a detachable probe with or without a disposable cover.
Special Controls
(1) Device is not a clinical thermometer with telethermographic functions;
(2) Device is not a clinical thermometer with continuous temperature measurement functions; and
(3) Appropriate analysis and testing (such as that outlined in the currently FDA-recognized editions, as appropriate, of ISO 80601-2-56, “Medical electrical equipment—Part 2-56: Particular requirements for basic safety and essential performance of clinical thermometers for body temperature measurement,” or ASTM E1965, “Standard Specification for Infrared Thermometers for Intermittent Determination of Patient Temperature,” or ASTM E1112, “Standard Specification for Electronic Thermometer for Intermittent Determination of Patient Temperature,” or ASTM E1104, “Standard Specification for Clinical Thermometer Probe Covers and Sheaths”) must validate specifications and performance of the device.
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Food and Drug Administration 10903 New Hampshire Avenue Document Control Center - WO66-G609 Silver Spring, MD 20993-0002
February 9, 2016
Guangdong Biolight Meditech Co., Ltd % Ms. Diana Hong General Manager Mid-link Consulting Co., Ltd P.O. Box 120-119 Shanghai, 200120 CHINA
Re: K152739
Trade/Device Name: Electronic Thermometer Regulation Number: 21 CFR 880.2910 Regulation Name: Clinical Electronic Thermometer Regulatory Class: II Product Code: FLL Dated: January 25, 2016 Received: February 1, 2016
Dear Ms. Hong:
We have reviewed your Section 510(k) premarket notification of intent to market the device referenced above and have determined the device is substantially equivalent (for the indications for use stated in the enclosure) to legally marketed predicate devices marketed in interstate commerce prior to May 28, 1976, the enactment date of the Medical Device Amendments, or to devices that have been reclassified in accordance with the provisions of the Federal Food, Drug, and Cosmetic Act (Act) that do not require approval of a premarket approval application (PMA). You may, therefore, market the device, subject to the general controls provisions of the Act. The general controls provisions of the Act include requirements for annual registration, listing of devices, good manufacturing practice, labeling, and prohibitions against misbranding and adulteration. Please note: CDRH does not evaluate information related to contract liability warranties. We remind you, however, that device labeling must be truthful and not misleading.
If your device is classified (see above) into either class II (Special Controls) or class III (PMA), it may be subject to additional controls. Existing major regulations affecting your device can be found in the Code of Federal Regulations, Title 21, Parts 800 to 898. In addition, FDA may publish further announcements concerning your device in the Federal Register.
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Please be advised that FDA's issuance of a substantial equivalence determination does not mean that FDA has made a determination that your device complies with other requirements of the Act or any Federal statutes and regulations administered by other Federal agencies. You must comply with all the Act's requirements, including, but not limited to: registration and listing (21 CFR Part 807); labeling (21 CFR Part 801 and Part 809); medical device reporting of medical device-related adverse events) (21 CFR 803); good manufacturing practice requirements as set forth in the quality systems (QS) regulation (21 CFR Part 820); and if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR 1000-1050.
If you desire specific advice for your device on our labeling regulation (21 CFR Part 801 and Part 809), please contact the Division of Industry and Consumer Education at its toll-free number (800) 638-2041 or (301) 796-7100 or at its Internet address
http://www.fda.gov/MedicalDevices/ResourcesforYou/Industry/default.htm. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR Part 807.97). For questions regarding the reporting of adverse events under the MDR regulation (21 CFR Part 803), please go to
http://www.fda.gov/MedicalDevices/Safety/ReportaProblem/default.htm for the CDRH's Office of Surveillance and Biometrics/Division of Postmarket Surveillance.
You may obtain other general information on your responsibilities under the Act from the Division of Industry and Consumer Education at its toll-free number (800) 638-2041 or (301) 796-7100 or at its Internet address
http://www.fda.gov/MedicalDevices/ResourcesforYou/Industry/default.htm.
Sincerely yours,
Tina Kiang
-S
for Erin I. Keith, M.S. Director Division of Anesthesiology, General Hospital, Respiratory, Infection Control and Dental Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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# Indications for Use
510(k) Number (if known) K152739
Device Name
Electronic Thermometer, Model WT1 and WT2
#### Indications for Use (Describe)
Electronic Thermometer is intended for measuring and monitoring human body temperature orally and/or under arm for adult, pediatric and infant. It can be used in healthcare facility and home.
| Type of Use (Select one or both, as applicable) | <span></span> Research Use Only (21 CFR 201.3 Subject to Transition) <span></span> For In-Vitro Diagnostic Use (21 CFR 809 Subject to Transition) |
|-------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------|
|-------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------|
__ Prescription Use (Part 21 CFR 801 Subpart D)
|X | Over-The-Counter Use (21 CFR 801 Subpart C)
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# 510(k) Summary
This 510(k) Summary is being submitted in accordance with requirements of SMDA 1990 and Title 21, CFR Section 807.92.
The assigned 510(k) Number: K152739
- 1. Date of Preparation: 1/25/2016
- 2. Sponsor Identification
# Guangdong Biolight Meditech Co., Ltd
Innovation First Road, Technology Innovation Coast Zhuhai, Guangdong, 519085, China
Establishment Registration Number: 3007305624
Contact Person: Ms. Liang, Jing Position: R&D Director Tel: +86-756-3399967 Fax: +86-756-3399989 Email: liang j@blt.com.cn
- 3. Designated Submission Correspondent
Ms. Diana Hong (Primary Contact Person) Mr. Lee Fu (Alternative Contact Person)
# Mid-Link Consulting Co., Ltd
P.O. Box 120-119, Shanghai, 200120, China
Tel: +86-21-22815850, Fax: 240-238-7587 Email: info@mid-link.net
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#### 4. Identification of Proposed Device
Trade Name: Electronic Thermometer Common Name: Clinical electronic thermometer Model(s): WT1, WT2
## Regulatory Information
Classification Name: Clinical electronic thermometer Classification: Class II Product Code: FLL Regulation Number: 21 CFR 880.2910 Review Panel: General Hospital
#### Intended Use Statement:
Electronic Thermometer is intended for measuring and monitoring human body temperature orally and/or under arm for adult, pediatric and infant. It can be used in healthcare facility and home.
# Device Description
The proposed device, Electronic Thermometer, is a handheld device with battery power supply, intended for measuring and monitoring human body temperature orally and/or under arm for adult, pediatric and infant. It can be used in healthcare facility and home. There is no specific use of this device other than temperature measurements, including conversion of temperatures.
The proposed device is available in two models, which are WT1 and WT2.
Similarities between models:
- a. Both of them incorporate a temperature sensitive sensor
- Both of them can measure and monitor human body temperature under arm; b.
- C. Neither the WT1 nor WT2 has display function, the measured or monitored temperature will be transmitted to a mobile application, Temp Sitter, installed under iOS system via the blue tooth to display the measured and monitored temperature;
Differences between models:
- WT1 has an automatic power on/off feature; a.
- WT1 can be used with an adhesive tape, which could be fix the thermometer under arm for b. measuring and monitoring;
- WT2 can be used with a designated probe cover; c.
- WT2 can be used for measurement of oral temperature. d.
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- 5. Identification of Predicate Device(s)
510(k) Number: K132514 Product Name: Kinsa Smart Thermometer
- Non-Clinical Test Conclusion 6.
Non clinical tests were conducted to verify that the proposed device met all design specifications as was Substantially Equivalent (SE) to the predicate device. The test results demonstrated that the proposed device complies with the following standards:
- > ISO 10993-5:2009/(R) 2014, Biological Evaluation Of Medical Devices -- Part 5: Tests For In Vitro Cytotoxicity.
- > ISO 10993-10:2010, Biological Evaluation Of Medical Devices - Part 10: Tests For Irritation And Skin Sensitization.
- > IEC 60601-1:2012, Medical Electrical Equipment - Part 1: General Requirements For Basic Safety And Essential Performance.
- > IEC 60601-1-2:2007/(R)2012, Medical Electrical Equipment - Part 1-2: General Requirements For Basic Safety And Essential Performance - Collateral Standard: Electromagnetic Compatibility - Requirements And Tests.
- > ISO 80601-2-56 First Edition 2009-10-01, Medical Electrical Equipment - Part 2-56: Particular Requirements For Basic Safety And Essential Performance Of Clinical Thermometers For Body Temperature Measurement.
- 7. Clinical Test Conclusion
No clinical study is included in this submission.
- 8. Substantially Equivalent (SE) Comparison
Table 1 Comparison of Technology Characteristics
| Item | Proposed Device | Predicate Device |
|-------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Product Code | FLL | FLL |
| Regulation Number | 21 CFR 880.2910 | 21 CFR 880.2910 |
| Intended Use | Electronic Thermometer is<br>intended for measuring and<br>monitoring human body<br>temperature orally and/or under<br>arm for adult, pediatric and infant.<br>It can be used in healthcare<br>facility and home. | The Kinso Smart Thermometer is<br>intended to measure the human body<br>temperature orally, rectally, or under<br>the arm, and the devices are reusable<br>for clinical or home use on people of<br>all ages |
| Measurement Site | orally and/or under arm | orally, rectally, or under the arm |
| Feature | Compatible with iOS Mobile<br>Device via | Compatible with iOS Mobile Device<br>via |
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| | wireless connection | wire connection |
|------------------------------|----------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------|
| | Display in mobile application, no<br>display on device | Display in mobile application, no<br>display on device |
| Component | Temperature Sensitive Sensor | Temperature Sensitive Sensor |
| | Plastic Housing | Plastic Housing |
| | Circuit Board | Circuit Board |
| | No Cable | Cable |
| | Battery (button cell) | Mobile Device Power Supply |
| Accessories | Adhesive tape (WT1) | No |
| | Container (WT1) | No |
| | Probe cover (WT2) | No |
| Range | $25.00°C~45.00°C$ | $35.00°C~42.00°C$ |
| Accuracy | $±0.1°C$ $25.00°C~34.99°C$ | Not Claimed |
| | $±0.05°C$ $35.00°C~38.50°C$ | $±0.1°C$ $35.00°C~42.00°C$ |
| | $±0.1°C$ $38.51°C~45.00°C$ | |
| Precision | 4 numeric digits displayed in 0.01<br>degree increments | 4 numeric digits displayed in 0.01<br>degree increments |
| Response Time | 5 minutes | 15 seconds |
| Unit | °C and °F | °C and °F |
| Patient contact<br>materials | Stainless Steel, S216<br>Polycarbonate (PC), 2458<br>Silicone, TPE<br>Non-Woven Cloth<br>Medical Melt Adhesive | Stainless Steel<br>Thermoplastic rubber<br>Acrylonitrile butadiene styrene |
| Biocompatibility | No Cytotoxicity<br>No Sensitization<br>Irritation-negligible | Comply with ISO 10993-5 and ISO<br>10993-10 |
| Electrical Safety | Complied with IEC 60601-1 | Complied with IEC 60601-1 |
| EMC | Complied with IEC 60601-1-2 | Complied with IEC 60601-1-2 |
Discussion of Main Differences:
The proposed device can only measure orally and/or under arm, however, the predicate device can additionally measure rectal temperature. The intended sites have been communicated in the user manual, and this will not affect the intended use of the device; the proposed device connects with the iOS device through wireless method, however, the predicate device connects the iOS device through cable. Risk analysis and associated verification has been performed that the wireless feature is acceptable; In addition, the proposed device has a longer response time, however, this time is still acceptable and communicated in the User Manual.
- 9. Substantially Equivalent (SE) Conclusion
Based on the comparison and analysis above, the proposed devices are determined to be Substantially Equivalent (SE) to the predicate devices.
Two short videos show you everything — or skip straight to the written tutorial if you'd rather read. You can reopen this any time from the Tutorial button in the top bar.
Part 1 — Search, results, and everyday workflows 16 min
Part 2 — Embeddings: the galaxy map 3 min
1. Search: exact and fuzzy
Type a phrase like "coronary artery calcification" into the search box. You get two kinds of results. Exact results match the literal phrase — prefix searches work ("coronary artery calcificati") but suffix searches do not. Fuzzy results match on the meaning and intent of your phrase rather than the exact words, and are sorted by relevance score. Hover over the Exact or Fuzzy badge on any row to see exactly why it matched.
Use the checkboxes above the results to narrow: SaMD keeps only software-only devices, AI / ML keeps only devices with AI.
Exact vs. fuzzy search: what's the difference?
Exact matches on the literal phrase (prefix search works, suffix does not). Fuzzy matches on the meaning and intent of the phrase rather than the exact words. Hover over the badge on any row to see why it matched.
You search "coronary artery calcification" and want only software devices with AI. What two filters do you apply?
Narrow by SaMD (software-only devices), then narrow by AI/ML (devices with AI).
2. The results table
Scroll right in the results table. The intended use is extracted for you — no need to open the PDF. The device story gives a high-level snapshot of what the device does and how it's used. The AI Performance sub-table shows each output name, acceptance criteria, observed values, and development/test dataset descriptions — the same format Innolitics uses for regulatory strategy outputs, and the fastest high-level fingerprint of an AI device. It is AI-generated but has been very reliable in practice.
Where do you find a device's intended use without opening the PDF?
Scroll right in the search results table. The intended use column is extracted for you; no need to dig into the 510(k) summary PDF.
What does the AI Performance sub-table show, and why is it useful?
Output name, acceptance criteria, observed values, development dataset description, and test dataset description. It's the same format we use for regulatory strategy output and Fast 510(k) input, and the fastest high-level fingerprint of an AI device. AI-generated but reliable in practice.
3. Judging fuzzy relevance
Fuzzy results trail off in relevance as you scroll. Use three signals to decide how far down to go: the fuzzy badge explanations, the intended use column, and whether your target output (e.g., Cobb angle) still appears in the AI Performance sub-table. Once it stops appearing, you're past the relevant zone. A top hit with a low score (~0.4) and a stretched explanation is a hint the closest predicates are far away — the project may be headed for De Novo. Note the fuzzy search is a pattern match: it doesn't handle negation ("not") well, and hardware devices can appear — filter by SaMD/AI ML to cut them.
How do you judge how far down fuzzy search results to go?
Use the relevancy signals: the fuzzy badge explanations, the intended use column, and whether the target output (e.g., Cobb angle) still appears in the AI Performance sub-table. Once it stops appearing, results are trailing off in relevancy.
4. Device detail page: chat and citations
Click a device name to open its detail page: device facts on the left, a chat window on the right. Ask something like "Describe the training data". The answer carries little citation bubbles — click one to jump to the highlighted passage in the source PDF, so you can verify every AI answer against the document. There's also a Download PDF button for sharing.
How do you verify an AI chat answer on the device detail page?
Click the citation bubbles to jump to the relevant highlight in the source document.
Reading rule for every project: how many summaries do you read in full?
At least the three most relevant 510(k) or De Novo summaries, in full. After that, use targeted chat questions to confirm your memory quickly. The tool supports this professional habit — it doesn't replace it.
5. Side-by-side comparison
Select multiple rows in the results table (aim for under ~10), then open the PDF Viewer tab. Ask one question — it goes to all selected devices in parallel, each with citations. This is the fastest way to compare and contrast devices: training data, PCCP scope, how they handled adding new scanners, and so on.
What does the side-by-side PDF viewer mode do?
Select multiple devices, open the PDF viewer tab, and ask one question (e.g., "Describe the training data"). It queries all selected devices simultaneously with citations, so you can compare and contrast quickly.
6. Collections
With rows selected, go to the Collections tab and create a labeled collection (e.g., "Cobb Angle Project"). Reload that selection any time — before a client call, pull up the collection and ask questions across all of its devices at once.
How do you save a set of selected devices for later use?
Select the rows, go to the Collections tab, and create a labeled collection (e.g., "Cobb Angle Project"). You can reload the selection anytime and carry it into the PDF viewer and other tabs that support selections.
7. Product codes and the regulations tree
Click a product code in the results to jump to it in the regulations tree — identification text, sibling product codes, and devices you can open in a PDF viewer on the right. Click a regulation number to see its identification, special controls, and related product codes. You can also search by product code or regulation number at the top of the tree. Always read the special controls if any exist for your device — it broadens your search and sharpens pre-kickoff research.
What can you do from the regulations tree view?
Browse product codes and regulation numbers, read the identification text and special controls, browse sibling product codes, open device PDFs on the right, and search by product code or regulation number at the top of the tree.
8. Chart view
Click Show Chart and segment by regulation number (or product code) to see which regulations dominate your result set. Clicking a regulation takes you into the regulations tree. Great for spotting that most matches are, say, hardware laparoscopic devices — a cue to go back and filter.
How do you see which regulations dominate a search result set?
Click "Show Chart" and segment by Regulation Number. Clicking a regulation takes you to the regulations tree.
9. The predicate graph
Open the Predicates tab for a family-tree view of predicate relationships. Click a node to trace its parents and children; selections from search carry over pre-selected. Commonly predicated devices are worth reading — a lot of people predicated them for a reason. The visual lineage is also handy on client calls, e.g. to show how a predicate family evolved and justify why your predicate still holds.
In the predicate graph, why are commonly predicated devices worth reading?
A lot of people predicated them for a reason. Clicking a node traces parents and children, and selections from search carry over pre-selected.
10. Embeddings: the galaxy map
The Embeddings tab plots every matching document in a 2-D "galaxy map" where semantically similar devices cluster together. Hover or click clusters to explore, and let AI label the clusters for you. Embeddings beat product codes for grouping: two devices can carry different product codes (LLZ vs. QIH) yet do the same thing — the embedding captures the meaning of the intended use and device story. This is also exactly how retrieval-augmented generation (RAG) works under the hood, and it makes a great visual on client calls.
Try it yourself
Head to the search page and work through a few of these AI/ML fuzzy searches to build intuition: perivascular fat on CT · aortic valve calcification opportunistic screening on noncontrast CT · breast cancer prediction on digital pathology slides · autism detection · gestational age prediction · a hearing aid that can also detect a pulse · foundation model based analysis of ECG · large language models · penetration test. Watch how the relevance scores, intended use, and AI Performance tables tell you when results stop being meaningful.