FeverWarn logo - Mass Fever Screening System

Body Temperature Scanner

Setting the Standard in Self-Service Infrared Scanning and Screening

New breakthrough OPX technology now included

Simply place your fist, wrist or forearm under the scanner (1-4 inches away) and a few seconds later you will get either a flashing green or red screen with the temperature display.

Wrist Temperature Scanner With Stand
FDA compliant

OPX Technology uses multiple geometric spatial sensors and AI-based algorithms to extend the ambient range of infrared scanners by up to 50%—making hand-held scanners obsolete and unsafe because physical distancing can’t be maintained.


Fast, FDA compliant, accurate, self-service Infrared scanning in as little as 1.5 seconds.


New, OPX artificial intelligence software and spatial scanning geometry provide an expanded ambient range from 40° F to 105° F. (Ordinary models only certified for 70° F to 94° F).

Data reporting

Self-servicing, no secondary temperature taker required.

Auxiliary USB outputs

On-board or cloud data reporting to shield from future liability.


Some models offer integration capability.

Reasonably priced

Uses self-service wrist/fist forward scanning technology, which is uncompromised by head coverings/hats, hair, or makeup.

automated infrared temperature scanner

FW-OPX-1100A3 and FW-OPX-1100B3 Series

  • New Generation Housing
  • Scans in 1.5 Seconds
  • Quick and Easy
  • Cloud or Cloudless
    (Coming Soon)
Infrared Temperature Scanner

FW-OPX-1100A2, FW-OPX-1100B2 and 250 Series

  • FW-OPX-1100A2 and FW-OPX-1100B2 Series in Generation 2 Housing
    (Available Now)
  • OPX Included in All Models
  • Series 250 for Integration with Doors, Gates, Kiosks and More

Learn why FeverWarn
is the #1 choice for
self-service, non-contact infrared temperature scanners.

Ready to learn more about how FeverWarn can help you?

Check out our video
for a quick overview.

What Do Users Say About FeverWarn?

FeverWarn has been proven by thousands of
installations across North America…

“We use our FeverWarn Temperature Scanning daily! As a preschool and childcare center, it is a vital tool in our business. As parents enter to drop off and pick up their children, we do a temperature and wellness check. This handy machine speeds up the process and is touchless.

We appreciate the company working with us to help get our machine up and running properly. Their customer service has been excellent. We will absolutely be doing business in the future with them”.

Executive Director
His Growing Grove Preschool & Child Care Center
First Presbyterian Church (California)

Infrared temperature scanner

infrared Infrared scanner

“We have been using FeverWarn for 3 months in our 9 Urgent Care Clinics and it has delivered all that we expected. It screens for patients for fevers quickly and unobtrusively and has been well received by our patients and staff.

We set up stanchions at the entry doors to our lobbies and have patients pass by the device before approaching the reception desk. The speaker announces that the patient is cleared for our staff and other patients in the lobby to hear.

The device also allowed us to move our patient screener back behind the reception desk where they can work safely and more efficiently. We are very satisfied and would recommend it to others.

No one is forced to expose themselves to get accurate temperatures. No one has a handheld temperature gun pointed at their head and they are not limited by size.”

Doctors on Duty Medical Clinics

“FeverWarn was chosen for our hospital because it enabled all staff to get to work on time. It took temperatures quickly, efficiently, and accurately. No other system was this this efficacious and timely.

In addition, the customer service staff is second to none. They are committed to getting it right, from the CEO to the inside support staff. “

Major East Coast Hospital Chain

Body Temperature Scanner

Make A Fist, See For Yourself

Body Temperature Scanner App

Increased body temperatures spreads to the skin via blood circulation. The skin surface of the hand, due to exposed high arterial flow, responds easily and steadily to changes in mean body temperature. Results are repeatable and steady with +/- 0.5 degrees.

Body Temperature Screening System

Try it yourself. Make a fist. You can clearly see the arteries in the hand leading to the fingers. The closeness of these arteries to the skin wall makes this area ideal for self-scanning and produces excellent results across a vast majority of the population.

Why the Wrist Beats the Head in Temperature Scanning

  • Virtually no perspiration vs. heavy perspiration of forehead which interferes with infrared scanning
  • Reduced hair on wrist/fist vs. possible hair interfering with forehead infrared thermometer scanners
  • No makeup on wrist/fist vs. eye and skin makeup on head infrared scanning
  • No interference by hats and face covering, which is commonplace with head infrared scanning
  • Easy self-serving without danger of personnel exposure prior to results

The Only Temperature Scanners with
OPX Extended Ambient Technology

Almost all infrared scanners, including handheld versions operated by others, are only rated for a temperature range of 70-94° F. In addition, they cannot be used where there is direct sunlight (due to UV rays), whether indoors or not. None of the handheld scanners are rated for outdoor usage.

FeverWarn has changed all that with the inclusion of OPX technology on all its new temperature scanners. The first of its type available anywhere in the world, the proprietary and patent-pending OPX technology extends the temperature bandwidth for infrared temperature scanning by up to 50% over ordinary temperature scanners. OPX consists of new spatial geometry sensors combined with an artificial intelligence algorithm to filter out the effects of cold and warm weather as well as problems with sunlight.

FeverWarn OPX models are ideal for temperature variant indoor entranceways that are not fully heated or cooled to regular indoor ambient bandwidth and has been shown to work from 40-104° F.

OPX technology available only from FeverWarn—making hand-held scanners obsolete and unsafe because physical distancing can’t be maintained.

Infrared Temperature Scanner
Infrared Temperature Scanner

What Happens in Colder Weather?

All infrared fever scanners have some inherent issues in colder ambient temperatures, especially when measuring unprotected body surfaces’ temperature. Knowing this, we’ve designed maximum flexibility into the FeverWarn 150/250 series. A longer snout allows for the scanning of the wrist/fist area and other body surfaces as well. With colder weather, the wrist’s underside is usually more protected from the cold, enabling individuals to obtain an accurate scan of the wrist or forearm’s underside by pulling up their coat/sweater sleeve.

This is especially true in high wind chill conditions because cold wind draws heat from exposed body parts (forehead, hands, etc.), leaving the skin surface much colder. Winter windchill can make the situation worse as a few minutes of exposure can drive down the skin and internal body temperature, hampering infrared thermometer results.

Body Temperature Scanner
Automated Temperature Screening

So Much More than a infrared Temperature Scanner…

The Only Self-Service Scanner to Offer Multiple Ways of Communicating with or Activating Auxiliary Devices

Learn how Feverwarn can easily integrate with auxiliary devices such as doors, kiosks, gates, scanners, employee tracking systems, and more for access control. And learn how you can incorporate it into your data management system for fully-automated compliance record keeping.

Click on the application description wheel segments below to learn more about FeverWarn integration capabilities that interest you.

Note: Integration with other devices presently requires the use of Model 250 FeverWarn Devices.
Integration is not possible with Model 1100 FeverWarn Devices.

So Much More than a Infrared Temperature Scanner...

FeverWarn is Your Expert Witness for Ongoing Compliance Reporting

With the CDC’s recommendations to monitor employee health and take measures to protect your employees. Compliance data backups and full reporting are an important part of avoiding future workman’s compensation or liability claims.

  • Legal experts claim that following all CDC recommendations and being able to prove such will help insulate you against legal claims.
  • Most handheld infrared scanners and even many infrared scanning systems have no way of retaining data or generating visual reporting.
Infrared Fever Screening System

Feverwarn offers legal liability coverage, including:

  • Storage of scanned temperature data
  • Storage of calibration logs confirming valid calibration
  • All data from visitor waiver form (Users can use FeverWarn visitor waiver mobile app where all stored data can be downloaded from the cloud or local storage.)

Why FeverWarn is Best Among Infrared Scanners

There’s Lots of Ways to Measure Temperature…But Few Include All the Advantages of FeverWarn.

Accuracy. Reliability. Simplicity. Safety

FeverWarn is ideally designed and positioned to offer advantages in self-service monitoring, proven accuracy, data storage and USB outputs all at a reasonable price and easy installation over alternative Infrared scanners. Like all IR scanners outdoor use is not recommended and it should be installed inside.

Mass Temperature Screening Device


Forehead Infrared Scanner

Most Infrared forehead temperature guns, although accurate and affordable, require human interaction and do not allow for proper social distancing. Sun, makeup, and varying heights also add to the difficulties of measuring the temperature from the forehead. Not for outside.


infrared technology

Uses same infrared technology as FeverWarn. Compromised by forehead perspiration, hair, makeup and head coverings not found on wrist measurements


Accuracy depends on perspiration, makeup, hair and positioning distance


Head covering

Head covering would need to be removed

Human intervention

Human intervention required

No data outputs

No data outputs for provable future compliance defense

auxiliary devices

No data outputs for auxiliary devices

FeverWarn - Infrared Temperature Scanner


FeverWarn OPX Series Infrared Scanner

FeverWarn uses the same infrared sensors as other Infrared scanners, but has been specifically designed for fist/wrist artery temperature scanning, which is not subject to high perspiration, significant hair, head coverings or make-up. Not for outside.


Manufactured in the USA

Manufactured in the USA

Consistent accuracy

Consistent accuracy not compromised by forehead perspiration, make-up, hair and head coverings

Sensor location

Sensor location is not compromised by UV sunlight

cloud data storage

Offers either local or cloud data storage to preserve compliance with monitoring guidelines

No additional intervention

No additional intervention or supervision required as with handheld temperature guns

Offers output signals

Offers output signals for doors and gates as well as integration with employee card systems

Convenient stands

Convenient stands and shrouds available to assist installation

Camera Based - AI Temperature Screening System


Camera Based Infrared Scanner

Infrared scanning cameras, while accurate, are expensive, and in some cases where facial recognition is used can cause privacy concerns. Not for outside.


No human intervention

No human intervention required

data outputs

Some models provide data outputs for future compliance defense

auxiliary devices

Some models provide data outputs for auxiliary devices

infrared sensor

Most use similar infrared sensor principle as FeverWarn


Accuracy depends on exposure to UV sunlight, makeup, facial coverings and distance and resolution of camera

high resolution camera

Not recommended for crowd scanning unless very high resolution camera, should primarily be used for individual scanning as with FeverWarn.


separately sold computer interface not included

Typically require separately sold computer interface not included

Privacy concerns

Privacy concerns

FeverWarn Infrared Scanner Models

Which FeverWarn is right for me?

Automatic Temperature Scanner Automatic Temperature Scanner
Color screen displays temperature in range of font sizes Flashes red or green depending on results FW-130 - LED Go/NoGo FW-200 - LED Go/NoGo
Built-in buzzer/alarm alert FW-200 - Mobile app to calibrate and view last 24 hours of data FW-230 - Mobile app to calibrate and view last 24 hours of data
Mobile app for iOS or Android FW-200 - Visitor waiver form for visiting guest FW-230 - Visitor waiver form for visiting guest
OPX proprietary sensor technology with expanded ambient range FW-200 - Local storage (20M scans) FW-230 - Local storage (20M scans)
Stand option $139 $139
Desktop stand option $89 $89
Wall-mount bracket FW-200 - Optional stands FW-230 - Optional stands
Wireless connectivity FW-200 - Update via mobile app FW-230 - Update via mobile app
Automatic product updates FW-200 - USB outputs FW-230 - USB outputs
Calibration FW-200 - Auxiliary USB outputs for gate/door FW-230 - Auxiliary USB outputs for gate/door
Calibration log


FW-230 - Voice announcement
Data storage methods

1000 scans onboard Wireless downloads

Private storage with master datahub option

No Microsoft® Cloud

1000 scans onboard Wireless downloads

Private storage with master datahub option

Microsoft® Azure Cloud

Crystalball app subscription

Annually renewable,
first year free

Annually renewable,
first year free

Cloud storage


Six months

Manage multiple FeverWarn devices via cloud

NO (only with purchase of master datahub option)

FW-230 - Two-years of cloud data
Email/text alerts


FW-230 - WiFi Dongle
Auxiliary USB outputs for doors, card readers, RFID, and more



Product availability

Available from stock

Available from stock

Price $599 $759

NOTE: FeverWarn, as with most infrared devices, is not sold as a medical device, but is intended as an initial screening for secondary clinical confirmation.

Frequently Asked Questions

A. FeverWarn is an IoT-based, skin temperature scanning system from MachineSense. The current models scan skin temperatures to act as your virtual screening tool without the need for personnel to hold IR scanning devices and compromise social distancing rules. The data is then captured and can be integrated into any third-party IT system depending on model
A. The system includes a bracket for the easy mounting of one infrared, touchless temperature sensor to be installed in either a fixture or entryways so that infrared radiations from a human body can be measured for elevated temperatures.

The OPX spatial geometry sensors included with all FeverWarn OPX Series models collect the infrared radiation in its field of view. Then the infrared radiation energy is converted into corresponding electrical signals when converging on the photoelectric detector.
Hand Temperature Scanner With Stand
A. No matter what happens in the future with many virus variants and vaccine boosters, most employers and employees, as well as teachers and students, now recognize that keeping sick people from any workplace or inside group exposure is just plain good common sense. No matter what virus or bacteria is involved, why would you want anyone with a high temperature in your workplace, school, or waiting room?

Ongoing concern about employee and visitor wellbeing is the new byproduct of the pandemic era, no matter what happens next. Employers do not want to have sick people in their workplace or inside areas. Employees want to be assured that there are no sick people in the environment as they return to work

The screening of people with temperatures, no matter if viral or bacterial, is even more crucial as we recognize that most buildings do not have adequate air exchange systems and that inside space with a high-temperature individual can easily result in others getting sick and preventing high productivity and good health.

Employers show they care by using FeverWarn; in turn, employees recognize that FeverWarn is a sign that their employers care about their wellbeing. Employees realize that the screening of visitors keeps them safer as well.

Screening for employee health to keep sick people home is the new standard in building safety and employee wellbeing.
A. 110/220V, 60Hz AC power supply will power FeverWarn
A. Yes. FeverWarn’s 250 models come standard with integration capabilities offering a relay signal to integrate with automatic openings. Feverwarn sends an ON/OFF relay based on a go/no go temperature via USB. A customer can purchase an appropriate USB relay converter for their relay system to automate door operation. FeverWarn 1100 models do not include integration capabilities.
A. FeverWarn is a patent-pending system developed by an IoT company MachineSense, LLC. and its partner Novatec, Inc., a US manufacturer with more than 50 years of experience in industrial equipment. The following are the unique features of FeverWarn when compared to other products.
  1. It is easy to install at doorways, entrances, and employee check-in systems, etc.
  2. It can be integrated with automated doors via USB output and is offered with Modbus and UART
  3. Alarm and statistics can be sent to the cloud. Deployers can receive alerts with a timestamp via SMS text messages or emails.
  4. Alarms and other statistics are available over REST API to integrate with any existing ERP systems.
  5. For large scale deployments, it offers an auto-calibration system for easy maintenance.
  6. It is calibrated using the human body to maintain calibration easily.
A. FeverWarn is a self-service temperature scanning system. Unlike inexpensive, minimal ambient range handheld devices, another individual does not have to hold the sensor 1-4 inches away from the subject’s forehead—often putting the individual holding the handheld sensor at risk by not meeting acceptable social distancing requirements.
  • FeverWarn offers cloud or onboard storage of temperature data.
  • FeverWarn offers state-of-the-art OPX technology, which extends the ambient range by up to 50% over any other infrared scanner on the market today. This specialized technology makes FeverWarn ideal for poorly temperature-regulated entranceways such as vestibules, which can also be compromised by direct sunlight intrusion.
  • FeverWarn 250 models offer integration capability with magnetic doors, kiosks, gates, employee card systems, and more.
A. Traditionally, all infrared infrared sensing systems have suffered from high inaccuracy due to warm or cold ambient conditions and the radiation from hot and cold air molecules. As a result, almost all infrared temperature scanning systems are only rated for operation from 70-94° F. Operating these handheld units outside of this temperature bandwidth will result in inaccurate readings.

FeverWarn’s new OPX Technology development has been implemented on all FeverWarn models extending the ambient range by up to 50% (from around 40-104°F in actual testing). This proprietary patent-pending technology consists of new spatial geometry sensors combined with an artificial intelligence algorithm to filter out the effects of cold or warm weather and problems with sunlight.

FeverWarn is the only temperature sensing system to feature this new OPX, which renders most other handheld scanners obsolete.
A. FeverWarn’s products are designed especially for doorways at building entrances. FeverWarn assures employees and customers of an efficient scranning process without violating social distancing standards. Custom configurations for other applications can be discussed with our engineering group. Standard products are for inside use only
A. Current FeverWarn products, even with OPX technology, should not be used outside.


FeverWarn will be shortly announcing new FeverWarn variants that can be used outside. One variant will be for outside environments greater than 40 degrees F, while the second will be for environments in a freezing area (40 degrees or less). These FeverWarns with protective sealing and weather shields can be positioned outside buildings, outside security gates, or other entrances. Remote visual and sound options can broadcast results inside the building for security personnel.

Register for product announcements
A. Each sensor is factory calibrated. If field calibration is required, customers can conduct their calibration by manual or automatic calibration process using the “MachineSense IoT Support” mobile app. In manual calibration mode, the human body temperature must be taken as a reference. In auto-calibration mode, the reference temperature will be taken from the calibrator by the device automatically. The calibration certificate will be readable from the web/mobile app. For bulk installation and operation, customers can purchase an auto-calibrator for automatic calibration of the system.
A. Handheld forehead scans can be compromised by forehead perspiration, hair, makeup, and head coverings. These known issues are not associated with fist/wrist scanning.

Also, human intervention is required for forehead scanning eliminating the opportunity to maintain proper social distancing.

No automatic data outputs are available for provable compliance and defense, if needed. No data outputs are available to connect with auxiliary devices for automatic opening of doors, gates, or integration with employee card systems.
A. Non-contact infrared thermometer imaging has several restrictions. Although skin temperature is a good indicator of a core body temperature, scanning skin temperature automatically can be difficult. The reliability of scanning the skin temperature depends on factors such as the use of makeup, skin color, sweating, exposure to ambient temperature, etc. Depending on those factors, error margins can be increased. That’s why the FDA recommends that if an elevated temperature is detected, a proper contact thermometer should be used to confirm a fever.
A. Fever is a rise in core body temperature. Blood vessels carry the temperature to the skin. That’s why the skin on top of the arteries is the best location for scanning a non-contact temperature. The fist has several arteries under the skin surface. The wrist or the underside of the wrist/forearm can be used in colder ambient conditions.
A. Fist and forehead temperatures go up and down with respect to body temperature exactly in the same way. If the fist temperature is known, the core body temperature can be predicted in the same way as the forehead. FeverWarn uses ambient correlated algorithms to adjust to core body temperature
A. Cloud storage offers significant advantages over local storage systems, including:
  1. If you have multiple scanning systems in numerous locations, all the data will be stored and viewed in a single app. This provides easy access to a centralized system.
  2. Email/SMS texts will be sent to designated persons as soon as an elevated temperature is detected.
  3. Software features will be automatically updated.
  4. Data can be seen anywhere, anytime, as opposed to a mobile app where data can only be seen when close to the device.
  5. Master data hub.
A. Many FeverWarn users store their anonymous temperature scanning information directly on the FeverWarn/MachineSense cloud (managed by Microsoft® Azure). However, in situations where information is gathered through integration with personnel or guest data, personal information storage is not permitted and should be stored locally. In this case, the data is held locally by the employer, hotel, or organization and can be easily accomplished using a private, local server with the FeverWarn master data hub (see integration section) and a site license of MachineSense’s Crystalball application.

The master data hub is a device that serves as a local computing cloud with an API that performs machine learning, aggregates, displays, routes, and transmits data. Operational modes include on-premise master and hybrid cloud master. This device can also manage multiple FeverWarn devices where an operation has numerous installations and wants to address them within a networked setting.
A. Baltimore, Maryland – USA
A. FeverWarn is built on the Microsoft® Azure Cloud platform. The servers are in Virginia, USA.
A. The market has been flooded with infrared thermometer camera systems often sold through US distributors posing as manufacturers. However, most are made by one company in China, all of which are making unsupported claims involving being able to scan multiple objects, scan individuals with hats and glasses, and scan outdoors. A complaint was filed with the Security Industry Association with the FDA, and articles have been written in the Wall Street Journal and Wire Magazines of schools and other institutions being victimized by these vendors. In some cases, devices from China are also using electronic components that have been banned by the US government.

FeverWarn is part of MachineSense, LLC. and an extension of Novatec, Inc. The device is manufactured in the US and meets all the criteria established by the Security Industry Association and is FDA compliant in its performance. Novatec and its suppliers have been making industrial machinery and instrumentation since 1965
A. Due to sunlight and ambient temperatures, any infrared scanning system is not for outdoor use. These devices should always be used in an inside vestibule or entrance where the temperature is controlled.
A. Since skin temperature can be affected by wind chill and there is no way of knowing how long somebody was outside or the level of exposure, any cold weather (below 60°F) will make most infrared devices ineffective. In this situation, FeverWarn models 150 and 250 with a longer snout can scan parts of the body that are not exposed to wind chill. Individuals can roll up their sleeves and quickly scan their forearms or their wrist’s underside in colder temperatures.
Automated Body Temperature Scanner
Automated Infrared Temperature Screening

For colder weather, the best way to scan is to place protected skin area under the scanner. Simply push up the sleeve on your jacket or sweater and present those unexposed skin areas for best results.

Ready to learn more about how FeverWarn can help you?

Check out our video
for a quick overview.

Contact Us

Have a question? Give us a call or fill out the contact form.

Machinesense/Novatec, Inc.