TRANSTEK GLASS BODY ANALYZER; TRANSTEK GLASS BODY ANALYZER; TRANSTEK GLASS BODY ANALYZER;TRANSTEK GLASS BODY ANALYZER
Applicant
Zhongshan Transtek Electronics Co., Ltd.
Product Code
MNW · Cardiovascular
Decision Date
May 2, 2011
Decision
SESE
Submission Type
Abbreviated
Regulation
21 CFR 870.2770
Device Class
Class 2
Indications for Use
The Transtek Glass Body Analyzer measure weight and uses bioelectrical impedance analysis (BIA) technology to estimate body fat, total body water percentage, bone mass, and muscle mass in generally healthy adults 18 years of age or older. It is intended for use in the home/domestic setting only.
Device Story
Transtek Glass Body Analyzer (models GBF-830, GBF-835, GBF-950, SA-15) uses foot-to-foot bioelectrical impedance analysis (BIA) to estimate body composition. Device inputs: electrical current (50 kHz) passed through body via glass and stainless steel pads on platform. Device outputs: weight, body fat mass, total body water, bone mass, muscle mass. Used in home/domestic setting by adults 18+; operator is the user. Data stored for 8-10 users. Device also functions as conventional scale. Output displayed to user for health/fitness monitoring.
Clinical Evidence
No clinical data provided; bench testing only.
Technological Characteristics
BIA technology; 50 kHz operating frequency; 4 electrodes; glass and stainless steel contact pads; battery-powered (AAA, AA, or CR2032 depending on model); standalone operation; stores data for 8-10 users.
Indications for Use
Indicated for generally healthy adults 18 years of age or older for measurement of weight and estimation of body fat, total body water percentage, bone mass, and muscle mass. Contraindicated for individuals with pacemakers or other internal medical devices.
Regulatory Classification
Identification
An impedance plethysmograph is a device used to estimate peripheral blood flow by measuring electrical impedance changes in a region of the body such as the arms and legs.
Special Controls
*Classification.* Class II (special controls). The device, when it is a body composition analyzer which is not intended to diagnose or treat any medical condition, is exempt from the premarket notification procedures in subpart E of part 807 of this chapter subject to the limitations in § 870.9.
Predicate Devices
Scaleman Body Fat Scales, Model FS-148BW1 (K083838)
Submission Summary (Full Text)
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K102191
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#### WE INSPIRE · WE DELIVER
# Section 5 - 510(k) Summary
- 2 2011
Date of Summary Preparation: 11/22/2010
#### 1. Submitter's Identifications
Submitter's Name: ZHONGSHAN TRANSTEK ELECTRONICS CO., LTD. Address: Jin'an Road, Minzhong, Zhongshan City, Guangdong, China Contact Person: Gorden Guo Contact Email Address: gzp@transtek.cn Telephone: 086-760-88282982 ext. 231 Fax: 086-760-85339231
#### 2. Correspondent's Identifications
Correspondent's Name: A03 Lab of BTS Address: No.1 Fanghua Street, Hi-tech Zone, Chengdu City, Sichuan, China Contact Person: Leo Wang Contact Email Address: leo.w@hibts.com Telephone: 086-28-86083300 Fax: 086-4006070050 ext. 8
#### 3. Name of the Device
Device Classification Name: Analyzer, Body Composition (Impedance Plethysmograph) Product Name: TRANSTEK Glass Body Analyzer Trade Name: Transtek Models: GBF-830, GBF-835, GBF-950, SA-15 Classification Panel: Cardiovascular Common/Usual Name: Body Composition Analyzer/Scales Product Code: MNW Device Classification: Class II Contraindications: Do not use the Analyzer if you have a pacemaker or other internal medical device.
#### 4. The Predicate Devices
Fook Tin, Scaleman Body Fat Scales, Model FS-148BW1, K083838
#### 5. Device Description
The TRANSTEK Glass Body Analyzer uses BIA (Bio Impedance Analysis) technology which passes an electrical current through the body to estimate body fat mass, total body water and bone
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mass. The electrical current is small and may not be felt. Contact with the body is made via glass and stainless steel pads on the platform of the analyzer.
This method simultaneously calculates your personal weight, body fat, total body water, bone mass and muscle mass, giving you a more accurate reading of your overall health and fitness.
This scale stores the personal data of up to 8 or 10 users. As well as being an analyzer, this device can be used as a conventional scale.
#### 6. Intended Use of Device
The Transtek Glass Body Analyzer measure weight and uses bioelectrical impedance analysis (BIA) technology to estimate body fat, total body water percentage, bone mass, and muscle mass in generally healthy adults 18 years of age or older. It is intended for use in the home/domestic setting only.
#### 7. Summary of Substantial Equivalence
Table 1: The difference between TRANSTEK Glass Body Analyzer and the predicate device, Scaleman Body Fat Scales (Model FS-148BW1)
| Feature | Proposed Device:<br>TRANSTEK Glass Body Analyzer<br>Models: GBF-830, GBF-835<br>GBF-950, SA-15 | Predicate Device:<br>Scaleman Body Fat Scales<br>Model: FS-148BW1 | |
|-------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--|
| 510(k) Number | K102191 | K083838 | |
| Manufacturer | ZHONGSHAN TRANSTEK<br>ELECTRONICS CO., LTD | Fook Tin Technologies Ltd. | |
| Classification | 21 CFR 870.2770 | 21 CFR 870.2770 | |
| Product Code | MNW | MNW | |
| Indication for use | The Transtek Glass Body Analyzer<br>measure weight and uses<br>bioelectrical impedance analysis<br>(BIA) technology to estimate body<br>fat, total body water percentage,<br>bone mass, and muscle mass in<br>generally healthy adults 18 years of<br>age or older. It is intended for use in<br>the home/domestic setting only. | The Scaleman Body Fat Scales-<br>Models in "Family Model List 1A"<br>is a series of body composition<br>analyzers that measure body weight<br>and impedance and estimate<br>percentage of body fat and body<br>water using BIA (bioelectrical<br>impedance analysis). They are<br>intended for use by healthy children<br>10-17 years old and healthy adults<br>with active moderately active to | |
| TRANSTEK | | K102191<br>PAGE 3 OF 4 | |
| | mass, muscle mass and body fat<br>simultaneously, thus giving you a<br>more accurate reading of your<br>overall health and fitness.<br>It is not intended for use by pregnant<br>women or children under the age of<br>18. | healthy children 10-17 years old<br>and healthy adults with active,<br>moderately active, to inactive<br>lifestyles for body composition<br>assessment in the home<br>environment. | |
| | | The Scaleman Body Fat Scales -<br>Models in 'Family Model List 1B' is<br>a series of body composition<br>analyzers that measure body<br>weight and impedance and<br>estimate percentage of body fat<br>and body water, bone mass and<br>muscle mass using BIA<br>(bioelectrical impedance analysis).<br>They are intended for use by<br>healthy children 10-17 years old<br>and healthy adults with active,<br>moderately active, to inactive<br>lifestyles for body composition<br>assessment in the home<br>environment. | |
| Device<br>description | TRANSTEK Glass Body Analyzer<br>utilizes a "foot-to-foot" bioelectrical<br>impedance analysis (BIA)<br>technology to determine internal<br>body composition. | Scaleman Body composition<br>analyzer/scale that utilizes a<br>"foot-to-foot" bioelectrical<br>impedance (BIA) technology to<br>determine internal body<br>composition. | |
| Analysis<br>method | BIA<br>(Bioelectrical Impedance Analysis) | BIA | |
| Operating<br>parameters | 50 KHz | 50 KHz | |
| Power<br>source | GBF-830, 4*AAA<br>GBF-835, 2*CR2032<br>GBF-950, 4*AAA<br>SA-15, 2*AA | Replaceable 9V or CR2032 or AAA<br>batteries, depending on the model. | |
| Operating<br>keys | GBF-830, GBF-835, GBF-950 (4),<br>SA-15 (3) | Range of 3 to 6, depending on the<br>model | |
| Number of<br>electrodes | 4 | 4 or 2 | |
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Section 5 - 510(k) Summary
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Page 3 of 4
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# TRANSTEK
## 8. Conclusions
The subject devices have all features of the predicate device, Scaleman Body Fat Scales (Model FS-148BW1) except the new features and the power source voltage of the device. These differences do not affect the safety and effectiveness of the subject devices : BIA (Bioelectrical Impedance Analysis) technology is same as what is used in Scaleman Body Fat Scales (Model FS-148BW1). Thus, the subject devices are substantially
equivalent to the predicate devices.
--- End of this Section ---
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# DEPARTMENT OF HEALTH & HUMAN SERVICES
Image /page/4/Picture/1 description: The image shows the logo for the U.S. Department of Health & Human Services. The logo consists of a stylized eagle or bird-like symbol with three curved lines representing its body and wings. The text "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" is arranged in a circular fashion around the symbol.
Food and Drug Administration 10903 New Hampshire Avenue Document Mail Center - WO66-G60 Silver Spring, MD 20993-0002
ZHONGSHAN TRANSTEK ELECTRONICS CO., LTD. c/o Mr. Leo Wang Consulting Manager A03 Lab of BTS No. 1 Fanghua Street, Hi-tech District Chengdu Sichuan 610041 CHINA
MAY - 2 2011
: Re: K102191
Trade/Device Name: TRANSTEK GLASS BODY ANALYZER Models: GBF-830, GBF-835, GBF-950, SA-15 Regulation Number: 21 CFR \$870.2770 Regulation Name: Impedance plethysmograph Regulatory Class: II Product Code: MNW Dated: April 8, 2011 Received: April 19, 2011
Dear Mr. Wang:
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.
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); medical device reporting of medical device-related
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### Page 2
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), please go to http://www.fda.gov/AboutFDA/CentersOffices/CDRH/CDRHOffices/ucm115809.htm for the Center for Devices and Radiological Health's (CDRH's) Office of Compliance. Also, please note the regulation entitled. "Misbranding by reference to premarket notification" (21CFR 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 Small Manufacturers, International and Consumer Assistance at its toll-free number (800) 638-2041 or (301) 796-7100 or at its Internet address http://www.fda.gov/MedicalDevices/Resourcesfor You/Industry/default.htm.
Sincerely yours,
Michael Lemur MD
Herbert P. Lerner, M.D., Director (Acting) Division of Reproductive, Gastro-Renal and Urological Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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# WE INSPIRE · WE DELIVER
# Section 4 - Indications for Use
510(k) Number (if known): K102191
Device Name:
TRANSTEK GLASS BODY ANALYZER Models:GBF-830, GBF-835,GBF-950,SA-15
Indications for Use:
The Transtek Glass Body Analyzer measure weight and uses bioelectrical impedance analysis (BIA) technology to estimate body fat, total body water percentage, bone mass, and muscle mass in generally healthy adults 18 years of age or older. It is intended for use in the home/domestic setting only.
Prescription Use _
AND/OR
Over-The-Counter Use ×
(Part 21 CFR 801 Subpart D)
(21 CFR 801 Subpart C)
(PLEASE DO NOT WRITE BELOW THIS LINE-CONTINUE ON ANOTHER PAGE IF NEEDED)
Concurrence of CDRH, Office of Device Evaluation (ODE)
ORH Office of Device
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.