vIRalert 2: Human Body Temperature Measurement System

In a world where global travel means infections can pass through populations fast, the ability to screen people for fever is a key tool in reducing the risk of disease spread. 

The vIRalert 2 fixed temperature monitoring system provides remote measurement of human body temperature (typically the face) to an accuracy of within 0.5°C enabling the detection of the small changes in temperature induced by a fever. 

Most economical thermal imagers can only achieve accuracy to within 2°C which is not adequate to detect a fever however by calibrating an imager in real time against a precise blackbody calibration source the vIRalert 2 system can provide accurate and reliable skin temperature measurement for the screening of personnel at point of entry to areas like airports, train stations, key operational facilities and factories and other places where infectious diseases can easily spread.

Using simple and intuitive software, this point-of-entry system provides automatic on-screen and audible alarms to alert the operator so that early action can be taken to protect the premises against the risk of spreading the infection.

 

KEY BENEFITS

  • Instant non-intrusive measurement using infrared thermal imaging technology with market-lead temperature measurement accuracy.
  • Monitors for high temperature without slowing down the flow of people.
  • Fixed remote measurement removes the risk of infection transmission to operators.
  • Complete On-line System Solution works out of the box and is simple to operate.
  • Quick and easy to install and re-locate as required with standard camera fitting for flexible mounting options.
  • Automatic alert function reduces potential for human error and immediately alerts the operator if trigger point reached.


KEY APPLICATIONS

  • Transport and Travel - Airports, Railway Stations, Subways, Underground Rail Systems, Large Public Buildings
  • Education - Schools, Colleges, Universities, Municipal Libraries
  • Business - Manufacturing Facilities, Warehouses, Offices, Government Buildings

 

SPECIFICATION & DESIGN

  • Thermal Imaging Camera - Continuously measuring 30 to 45°C / 86 to 113°F, with a 39 x 31° field of view and 80 x 64 resolution gives 5,210 temperature data points per frame, at a rate of 9 Hz.
  • Certified Blackbody Heat Source - Providing a trusted reference temperature value calibrated at 38 °C / 100.4 °F for the thermal imaging camera with a large plate for viewing at longer distances.
  • Connecting Cables - Ethernet and Power between camera and laptop (5m / 15ft).
  • Flexible Mountings - Camera supplied with wall mounting bracket and standard 1/4-20 UNC thread for use with alternative mounting options. Wall mounting lugs on calibration source enable easy fitting with wall hooks.
  • Screening Software - Continuous or still image showing normal temperature in black and white with abnormally high temperatures in red. On screen and audio alarm triggered if potential fever detected. Supply of Windows 10 Laptop for running software is optional.
  • Calibration - Each system is calibrated at our ISO17025 accredited facility in the UK.

A typical detection distance of 1 metre,  provides a field of view of 70 x 55 cm so that checks can be made without any contact with the operator.


 

vIRalert 2 Frequently Asked Questions

 

The camera is supplied with wall mounting bracket and standard 1/4-20 UNC thread for use with alternative mounting options. Wall mounting lugs on calibration source enable easy fitting with wall hooks.

The camera has a proprietary single connector with power and comms combined, split into a USB and ethernet adapter.

If desired, the cable could be extending using something similar to the items listed below. Note: these have not been tested by us, nor have we used these particular products. These are merely examples of what should work.

https://www.amazon.co.uk/DSLRKIT-Active-Splitter-Ethernet-Raspberry/dp/B01H37XQP8

https://www.ebay.co.uk/itm/USB-2-0-A-female-socket-to-Micro-5pin-5p-USB-B-female-adapter-Cable-Connector/231984467536?hash=item36035a0e50:g:Ot8AAOSwBiBaqn18

 

We can’t send specific SOPs, but we will include some guidelines for use in the revised User Guide which should be released very shortly.

The vIRalert 2 Software can be downloaded by clicking here.

There is no license required so you will be able to download and deploy to an unlimited number of machines.

SYSTEM
Accuracy +/-0.5°C (at a distance of 1m)


 CAMERA
Temperature Measurement  Range:  30 to 45°C / 86 to 113°F
 Detector Array Format:  80 x 64 pixels
 Detector:  Uncooled Thermopile Array
 Spectral Response:   8 to 14µm
 Frame Frequency:  9Hz 
 Temperature Resolution:  <0.12°C
 Field of View:  39 x 31°
 Power Supply Requirement:  5VDC (USB) from computer
 Interfaces:  Wired Ethernet
 Image Processing Software: Continuous or still image display showing normal temperature in black and white with abnormally high temperatures in red. On screen and audio alarm triggered when detected.
 Operating Temperature Range:  10 to 50°C / 50 to 122°F


 BLACKBODY HEAT SOURCE
 Temperature:  38°C / 100.4°F
 Emissivity:  0.97
 Target Size:  80x120mm
 Combined Accuracy / Stability:   +/-0.2°C  (+/-0.3°F)
 Power Supply Requirement:  100-240VAC, 2A (Supplied with 12VDC power adaptor)             
 Operating Temperature
 Range:
 10 to 50°C / 50 to 122°F


Note: Human skin temperature is affected by a wide number of environmental and physiological factors. Elevated facial skin temperature may signify a raised body core temperature; correspondingly, an elevated core temperature may not be accompanied by a raised facial skin temperature. vIRalert systems are accurate scientific systems that must be operated strictly in accordance with the manufacturer’s operating manual. vIRalert systems are not intended, nor designed, to diagnose or detect medical conditions including, but not limited to, viruses or other illnesses. Thermal imaging products should only be used to detect variations of surface temperature. If elevated skin temperature is detected, the finding should be confirmed by other means, for example, an approved medical thermometer. The absence of an elevated skin temperature does not exclude a fever.

Is vIRalert 2 an FDA 510(k) cleared device? 
No. The vIRalert 2 system is not intended for use as a medical device, and does not require FDA 510(k) compliance when used to detect temperatures prior to entry into a facility. We are careful not to market the system as a replacement for any medical diagnosis or treatment.

What is the system frame rate (Hz)? 
<9Hz 

Can the system be used over Wi-Fi or mobile app? 
No, the system comes with a split communication and power cable. 

Is there an SDK available for vIRalert 2?  
There is no SDK for vIRalert 2. Developers are not permitted to modify the performance of the program. 

Does vIRalert 2 use facial recognition or store facial images? 
VIRalert 2 does not use any facial recognition software of any kind and does not store user data, therefore being complaint with privacy requirements. 

What is included in my software license? 
VIRalert 2 comes with a free windows software program which comes with a software license when you buy the product. This includes any updates to the software released by AMETEK Land. 

Expedited delivery
Considered on a case by case basis. We may want to prioritise hospitals and critical infrastructure.

Can I order a commissioning engineer?
This should not be required; the system is designed to work out the box and setup should be possible by any unskilled operator very quickly using the documentation and videos. Our customer support is currently available through existing channels, phone and website. We have a webchat facility online.

Is the system US HIPPA compliant?
No camera is specifically compliant or not, the burden is on the health provider to use Personal Health Information (PHI) responsibly. Our system does not provide high resolution facial images, and does not record data, and as a point of access system, is designed to be in public areas, where there are no restrictions.

What additional IO is available?
There is a standard Ethernet connection between the camera and laptop. Additional physical IO and digital output requirements can be quoted on a case by case basis. The standard system is designed as a quick, simple, low cost, off the shelf solution.

What temperature is the calibration source set to? Can I adjust it?
No, this is preset to 38 degrees Celsius

Does the system emit any harmful radiation?
No, it only measures infrared energy emitted from surfaces, it does not emit any radiation itself.

Can the system be used outdoors?
No, it is not IP sealed.

Are there any specific considerations for the installation?
Please ensure that: the calibration source is not mounted next to a radiator, the camera sees the person as the hottest object, not the background through the open door, make sure there are no radiators, heaters or other heat source e.g. hot power supplies or hot monitors in the FOV, the calibration source is not obstructed at any time. 

Do ambient temperature swings affect the temperature readings?
The 38 °C calibration source is temperature controlled and permanently located within the field-of-view of the imager, so we always know the imager is showing the correct temperature. Body temperatures are essentially compared to the reference temperature. Human skin temperatures fluctuate depending on ambient conditions, so alarm thresholds are determined locally.
http://www.healthyheating.com/Definitions/facts_about_skin.htm#.xnsptygzzey Dr. K.R. Koehler College Physics for Students of Biology and Chemistry, University of Cincinnati.

Will we need to get an export licence?
Not subject to export licence requirements.

Are the Regions of Interest adjustable?
Yes, they are configurable to set an ROI around the calibration source and where the public will be. Instructions are available in the user guide.

Can I scan groups of people passing through the point of entry?
No. Each subject must be stopped so that they can stand, or sit, still and directly face the camera in order for an accurate temperature value to be taken.

How long does vIRalert 2 take to set up? 
Typical setup time takes between 5 to 10 minutes on initial setup. 

What is the setup configuration? 
The typical detection distance is 1 metre. The Blackbody Source should be placed 1m from the Camera, then the subject must stand next to the Blackbody Source looking at the Camera, and both the subject and the Blackbody Source must be in the Camera frame at the same time.  Failure to follow these distance guidelines may result in less accurate skin temperature readings.

What is required to operate vIRalert 2 in addition to what is included in the box? 
A PC, laptop, or tablet running Windows 10 is required. Additionally, you will need a way to mount the Blackbody Source and the Camera. There are a variety of suitable options available that range from using standard camera tripods to more permanent installation options. 

How do I download vIRalert 2 Software? 
VIRalert 2 software can be downloaded from the vIRalert 2 product page.

Does the system require Wi-Fi? 
No. The system does not require Wi-Fi to function. As mentioned above, AMETEK Land may update the software occasionally and provide a download option on our website.

How accurate is vIRalert 2?
VIRalert 2 has ± 0.5°C measurement accuracy aimed at an object with a temperature that is known and stable, such as a Blackbody Source. Unlike economical industrial thermal cameras, vIRalert 2 was developed and calibrated for precise skin temperature values and maximizes accuracy by referencing the Blackbody Source with a known temperature value. Note: Human skin temperature is affected by a wide number of environmental and physiological factors. Elevated facial skin temperature may signify a raised body core temperature; correspondingly, an elevated core temperature may not be accompanied by a raised facial skin temperature. vIRalert systems are accurate systems that must be operated strictly in accordance with the manufacturer’s operating manual.

Can vIRalert 2 be used to detect an illness, fever, virus or infection? 
No. vIRalert systems are not intended, nor designed, to diagnose or detect medical conditions including, but not limited to, viruses or other illnesses. AMETEK Land thermal imaging products should only be used to detect variations of surface temperature. If elevated skin temperature is detected, the finding should be confirmed by other means, for example, an approved medical thermometer. The absence of an elevated skin temperature does not exclude a fever.

Can the system replace a medical thermometer?
No, medical thermometers are used by trained professionals for core temperature diagnostics. vIRalert 2 does not do this. VIRalert 2 measures the skin temperature of an individual and alerts the user when the subject's skin temperature exceeds the user-selected threshold. VIRalert 2 can be used for screening and allows the operator to maintain a safe distance from the subject.  VIRalert 2 does not take the place of a medical thermometer for measurement of a person’s body temperature to diagnose fever. 

Does ethnicity affect the temperature values? 
No. 

What affects skin temperature differences? 
A few variables can affect HBTM differences. VIRalert 2 detects the hottest area of the face for temperature measurement. Sunbathing and exposures to other hot temperatures can increase the temperature of the skin temporarily, and perspiration, cool rainwater or cold wind on a face may temporarily cool a face. This should be taken into consideration when screening. 

Why doesn’t your system display body temperature, which I am used to seeing on my thermometer? 
VIRalert 2 is not a medical thermometer and it does not measure body temperature.  VIRalert 2 displays your skin temperature at the warmest point detected on the face.  The relationship between skin temperature and body temperature depends on multiple factors.  However, screening for elevated skin temperatures above your population will have a high likelihood of detecting elevated body temperatures. 

Do I need any special training to use vIRalert 2? 
No, the software is simple to set up and easy to use. 

Where should I set my alarm temperature threshold? 
The temperature alarm threshold is user adjustable. Skin temperature may vary based on a variety of circumstances. For this reason, vIRalert 2 graphs all recent temperature measurements to help the user clearly see anomalies and set a desired temperature alarm threshold based on their own population and environment. By looking at this data the user can determine if they are setting the threshold at their desired screening level, typically a couple of degrees higher than where these measurements are clustered. 

What should I do if someone has a temperature above the threshold I set? 
The actions after the temperature measurement should be decided by the user.

Do I need the Blackbody Source in the frame? 
Yes, this is required. The Blackbody Source enables vIRalert 2 to produce higher accuracy than a standard thermal imaging Camera. VIRalert 2 will not operate unless the Blackbody Source is detected in the Camera frame. 

Does the Blackbody Source work with any other power sources? 
No, please use the power supply provided by AMETEK Land in order to maintain the best performance of the system. 

Can vIRalert 2 screen more than one person at a time?
 
No, the system is designed for a single person. 

Can multiple systems be used with one computer? 
VIRalert 2 supports one system per computer. 

How much time does each scan take per person? 
Measurement time is 1-3 seconds. 

Does vIRalert 2 have audible alarms? 
Yes. VIRalert 2 has an audible alarm when thresholds are exceeded.     

Will a nearby heating and air condition vent affect the system? 
Environments such as warm and cold conditions may affect temperature values. For best performance, we recommend installing this system inside a temperature-controlled environment.  You should also avoid leaving the Blackbody Source in direct sunlight or near heat sources.

What type of lighting is required for the system to function? 
Standard indoor lighting is needed for best results using vIRalert 2.

For additional information or to request specification sheets, please contact us by calling 800.500.8889 or click here.

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