Devices

Thermavis

FDA issued a warning letter to Thermavis (London, United Kingdom) on Mar 4, 2021. Subject: Adulterated and Misbranded Products Related to Coronavirus Disease 2019 (COVID-19).

From the letter: “The Multi-Person Thermal Screening Camera is offered for sale in the United States without marketing approval, clearance, or authorization from FDA.”

London, United KingdomIssued Mar 4, 2021Posted Mar 4, 2021Close-out Mar 25, 2025

FDA published a close-out letter on Mar 25, 2025. The findings below are from the original warning letter.

At a glance

What a reviewer notes before reading: findings, citations, the response deadline and what the letter warns of.

Violations
3 findings · 2 issue types
Cited
No CFR or ISO section
Response due
Not stated in the letter
FDA asks for
4 actions
Named as possible actions
Seizure, injunction, detention, refusal of admission
Issued by
Center for Devices and Radiological Health
Published status
Close-out Mar 25, 2025

AI assisted findings

Model-assisted reading of each issue. Open one to see the FDA text it comes from, and check it against the full letter.

01Registration, listing & premarketThe product is offered for sale in the United States without marketing approval, clearance, or authorization from FDA.
The Multi-Person Thermal Screening Camera is offered for sale in the United States without marketing approval, clearance, or authorization from FDA.
02Registration, listing & premarketThe firm did not have an approved application for premarket approval or an approved investigational device exemption.
Your product is adulterated under section 501(f)(1)(B) of the Act, 21 U.S.C. § 351(f)(1)(B), because your firm does not have an approved application for premarket approval (PMA) in effect pursuant to section 515(a) of the Act, 21 U.S.C. § 360e(a), or an approved application for an investigational device exemption (IDE) under section 520(g) of the Act, 21 U.S.C. § 360j(g).
03Labeling, claims & marketingThe firm did not notify FDA of its intent to introduce the product into interstate commerce as required.
Your product is also misbranded under section 502(o) the Act, 21 U.S.C. § 352(o), because your firm did not notify the agency of its intent to introduce this product into interstate commerce for commercial distribution as required by section 510(k) of the Act, 21 U.S.C. § 360(k).

What FDA requested

  • Send an email to COVID-19-Task-Force-CDRH@fda.hhs.gov describing the specific steps taken to address these violations, using CMS # 613564 as reference.
  • Include an explanation of each step being taken to prevent the recurrence of any violations, as well as copies of related documentation.
  • If the action cannot be completed within 48 hours, state the reason for the delay and the time within which it will be done.
  • If the product is believed not to be in violation, include reasoning and supporting information.

FDA Warning Letter

25 paragraphs · 1 section

Text as published on FDA.gov, retrieved Sep 8, 2026. Layout added for reading; the wording is FDA’s. View on FDA.gov (opens in a new tab)

Sent toMark Norman Nightingale Thermavis 19 Heather Park Drive London, HA0 1, GB ENGLAND
markn@transputec.com RE: Adulterated and Misbranded Products Related to Coronavirus Disease 2019 (COVID-19)
AddressedDear Sir,

1Letter text

17 paragraphs

This is to advise you that the United States Food and Drug Administration (FDA) reviewed your website at the Internet address https://thermavis.com/ December 14, 2020 and February 25, 2021. The FDA has observed that your website offers a product for measuring human body temperature, specifically the “Multi-Person Thermal Screening Camera”, for sale in the United States. Based on our review, this product is intended to mitigate, prevent, treat, diagnose or cure COVID-191 in people, and thus are devices under section 201(h) of the Federal, Food, Drug, and Cosmetic Act (the “Act”), 21 U.S.C. § 321(h).

FDA’s review of your website revealed the following statements that establish that the Multi-Person Thermal Screening Camera is intended for the mitigation, prevention, treatment, diagnosis, or cure of COVID-19, including:

• “Thermavis thermal workplace technology has been designed and developed to assist organisations and workplaces prevent the spread of Covid-19.” [Published on your Frequently Asked Question webpage, https://thermavis.com/apps/help-center#hc-can-thermavis-products-be-used-to-detect-a-virus-such-as-the-novel-coronavirus-covid-19-1]

• “Our solution can help get your people back to work by screening for elevated body temperatures, a well-known symptom of COVID-19, using thermal imaging so that you can proactively take preventative action, reduce the potential spread of infection and ensure business continuity.” [https://thermavis.com]

The Multi-Person Thermal Screening Camera is offered for sale in the United States without marketing approval, clearance, or authorization from FDA. Accordingly, your product is adulterated under section 501(f)(1)(B) of the Act, 21 U.S.C. § 351(f)(1)(B), because your firm does not have an approved application for premarket approval (PMA) in effect pursuant to section 515(a) of the Act, 21 U.S.C. § 360e(a), or an approved application for an investigational device exemption (IDE) under section 520(g) of the Act, 21 U.S.C. § 360j(g). Your product is also misbranded under section 502(o) the Act, 21 U.S.C. § 352(o), because your firm did not notify the agency of its intent to introduce this product into interstate commerce for commercial distribution as required by section 510(k) of the Act, 21 U.S.C. § 360(k). The introduction or delivery for introduction of these products into interstate commerce is prohibited under section 301(a) of the Act, 21 U.S.C. § 331(a).

There is currently a global outbreak of respiratory disease caused by a novel coronavirus that has been named “severe acute respiratory syndrome coronavirus 2” (SARS-CoV-2). The disease caused by the virus has been named “Coronavirus Disease 2019” (COVID-19). On January 31, 2020, the Department of Health and Human Services (HHS) issued a declaration of a public health emergency related to COVID-19 and mobilized the Operating Divisions of HHS.2 In addition, on March 13, 2020, the President declared a national emergency in response to COVID-19.3 Therefore, FDA is taking urgent measures to protect consumers from certain products that, without approval, clearance, or authorization by FDA, claim to mitigate, prevent, treat, diagnose, or cure COVID-19 in people. As described herein, you offer for sale a product that is intended for use in the mitigation, prevention, treatment, diagnosis, or cure of COVID-19 in people. We request that you take immediate action to cease the sale of such adulterated and misbranded products for the mitigation, prevention, treatment, diagnosis, or cure of COVID-19.

Use of telethermographic devices for the assessment of human body temperature can present potentially serious public health risks. Such risks may include, but are not limited to, the device incorrectly detecting a normal human body temperature when a person has an elevated temperature and incorrectly assessing a person to have an elevated body temperature when they do not. A person with an undetected elevated temperature who was subject to temperature assessment using a telethermographic device may, as a result, be less likely to adhere to infection prevention and control guidelines, such as social distancing and using personal protective equipment. These risks are more likely to be present where telethermographic devices scan multiple individuals simultaneously. Your website, https://thermavis.com/, includes statements that indicate that the Multi-Person Thermal Screening Camera is intended to scan multiple individuals simultaneously, including:

• Your device is named “Multi-Person Thermal Screening Camera” [Published on your webpage, https://thermavis.com/products/thermal-camera-3]

• “Thermavis Thermal Screening System accurately measures the body temperature of multiple subjects at any one given time.” [Published on your webpage, https://thermavis.com/products/thermal-camera-3]

• “Instant and Accurate Body Temperature Measurement of Multiple People” and “Instant Multi-Person Recognition” [Published on your webpage, https://thermavis.com/pages/multiperson-thermal-scanner]

• The Frequently Asked Questions webpage says, “up to 6 subjects at any one time” [Published on your webpage, https://thermavis.com/apps/help-center#hc-how-many-people-does-it-detect-at-any-one-time]

For more information about FDA’s regulation of devices used to mitigate, prevent, treat, diagnose, or cure COVID-19; frequently asked questions; and other helpful resources, visit our website at https://www.fda.gov/medical-devices/emergency-situations-medical-devices/coronavirus-covid-19-and-medical-devices. In addition, the guidance titled “Enforcement Policy for Telethermographic Systems During the Coronavirus Disease 2019 (COVID-19) Public Health Emergency”4 provides information about FDA’s policies intended to help expand the availability of telethermographic systems used for body temperature measurements for triage use during the COVID-19 public health emergency.

You should take action to address the violations cited in this letter. This letter is not meant to be an all-inclusive list of violations that exist in connection with your products or operations. It is your responsibility to ensure that the products you sell are in compliance with the Act and its implementing regulations. We advise you to review your websites, product labels, and other labeling and promotional materials to ensure that you are not misleadingly representing your products as safe and/or effective for a COVID-19-related use for which they have not been approved, cleared, or authorized by FDA and that you do not make claims that misbrand the products in violation of the Act. Within 48 hours, please send an email to COVID-19-Task-Force-CDRH@fda.hhs.gov describing the specific steps you have taken to address these violations, using CMS # 613564 as reference. Include an explanation of each step being taken to prevent the recurrence of any violations, as well as copies of related documentation. Failure to adequately address any violations may result in legal action, including, without limitation, seizure and injunction.

FDA is advising consumers not to purchase or use certain products that have not been approved, cleared, or authorized by FDA and are being misleadingly represented as safe and/or effective for the mitigation, prevention, treatment, diagnosis, or cure of COVID-19. Your firm will be added to a published list on FDA's website of firms and websites that have received warning letters from FDA concerning the sale or distribution of COVID-19 related products in violation of the Act. This list can be found at https://www.fda.gov/consumers/health-fraud-scams/fraudulent-coronavirus-disease-2019-covid-19-products. Once you have taken actions to address the sale of unapproved, uncleared, and unauthorized products for the mitigation, prevention, treatment, diagnosis, or cure of COVID-19, and any appropriate corrective actions have been confirmed by the FDA, the published list will be updated to indicate that your firm has taken such corrective actions.

This letter notifies you of our concerns and provides you with an opportunity to address them. If you cannot take action to address this matter completely within 48 hours, state the reason for the delay and the time within which you will do so. If you believe that your product is not in violation of the Act, include your reasoning and any supporting information for our consideration.

If you are not located in the United States, please note that products that appear to be adulterated or misbranded are subject to detention and refusal of admission if they are offered for importation into the United States. We may advise the appropriate regulatory officials in the country from which you operate that FDA considers your products listed above to be adulterated and misbranded products that cannot be legally sold to consumers in the United States.

Please direct any inquiries to FDA at COVID-19-Task-Force-CDRH@fda.hhs.gov.

Sincerely, /S/ Courtney H. Lias, Ph.D. Acting Office Director OHT3: Office of GastroRenal, ObGyn, General Hospital and Urology Devices Office of Product Evaluation and Quality Center for Devices and Radiological Health

1As explained below, there is currently an outbreak of a respiratory disease named “Coronavirus Disease 2019” (COVID-19).

2Secretary of Health and Human Services Alex M. Azar II, Determination that a Public Health Emergency Exists (originally issued Jan. 31, 2020, and subsequently renewed), available at https://www.phe.gov/emergency/news/healthactions/phe/Pages/default.aspx.

3President Donald J. Trump, Proclamation on Declaring a National Emergency Concerning the Novel Coronavirus Disease (COVID-19) Outbreak (Mar. 13, 2020), available at https://trumpwhitehouse.archives.gov/presidential-actions/proclamation-declaring-national-emergency-concerning-novel-coronavirus-disease-covid-19-outbreak/.

4Accessible at https://www.fda.gov/media/137079/download.

Citations and trends

Each 21 CFR section, ISO 13485 clause and issue type in this letter, how often it appears across all letters, and its trend by the year FDA issued the letters. 2026 runs to Nov 3, 2026, compared with the same dates last year. Select a row or a bar to see those letters in Letters. As cited in this historical letter, not a statement of current requirements.

This letter cites no 21 CFR section or ISO 13485 clause.

Issue types

Record details

Issuing center
Center for Devices and Radiological Health
Issuing office
Center for Devices and Radiological Health
Location
London, United Kingdom
Letter posted date
Mar 4, 2021
Letter issue date
Mar 4, 2021
Addressed to
Not recorded
Inspection dates
Not recorded
Response window
Not verified in this snapshot. Consult the original letter.
Record length
1,401 words · 0 recorded redactions
Published status
Close-out published Mar 25, 2025
FDA reference
613564
Original letter
View on FDA.gov (opens in a new tab)
Dataset last checked
Nov 11, 2026 · How this is built

A response window is not a calculated due date. Source excerpts are selected passages. Finding interpretations and categories are model-assisted. Verify the original letter before relying on a finding.

See the pattern across 1,707 lettersFind letters like this →
Keep exploring

More medical-device letters

Recent records for the same product type. Your previous filters remain available when you return.

Keep exploring

Find letters like this →
For regulated teams

Put this kind of reading to
work on your own records.

Botable builds and runs a custom AI layer around the software you already use, so your team can do the job you hired them for.

Every letter by dateHow this database is built

FDA Warning Letter Alerts

Share this view

Send the same filters, search and view to a colleague.

You choose what to post or send. Sharing a link does not change access to this site.