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Electrical Mirror

Thermal scanning at workplace is must in COVID-19 scenario: A government mandate

22 Jun 2020

The wide spread threat of the pandemic has impacted our industry operations to a great extent. A brief season of lockdown became a necessary protocol to be followed by everyone. But now when the situations are changing and we prepare to restart all our operations again, necessary precautions and proper care has to be taken to ensure the safety of all our colleagues. The primary step that is advised for all workplaces includes the implementation of Thermal scanning and fever detection techniques at the entrance of the facility. Government of India, Ministry of health has also put forward a mandate for the Provision for thermal scanning at all public spaces & organizations.
Testo India being the pioneers in testing and measurement instruments play an important role in providing such mass scanning solutions, in the form of testo Thermal Imagers. These thermal imaging cameras allow non contact measurement of body surface temperature & are proven to detect elevated skin temperatures brought by various external causes like Covid-19, this makes them non-invasive first step for febrile detection.
 
Thermal Cameras at work
Testo Thermal Cameras such as testo 890 has built-in fever detection mode and automatic face recognition feature that helps the user to conduct mass scanning of the people. They can be installed at the entrance of the premises over a tripod & a separate LED screen (connected to the instrument via HDMI cable) can be used as a bigger virtual screen to monitor the scan results of the people or can be manually handled by a person to inspect the entrants.
While in operation, the thermal imager will give hottest temperature when FOV (field of view) of the camera / lens covers minimum a face of the person. Generally, temperature of retina or inner canthus of eye (corner of the eye where the upper and lower eyelids meet) which is near to (not exactly) core body temperature is measured. While screening, the surface temperature of the skin is recorded and an alarm is triggered if it exceeds a certain threshold value (approximately equal to or above 99.5 deg F). This allows those with an elevated body surface temperature to be identified quickly and easily. They can be isolated from others & further medical investigations are carried out.
 
Thermal Scanning guidelines and key points
It is necessary for the person conducting thermal scanning to know about the process, procedure and application of the equipment. However, if someone is determined to use technology with no experience, no training and without right kind of product he is expected to get false & wrong results. Another necessary point to understand about this method is that the thermal imaging cameras can only detect, measure and document the variations of skin surface temperatures and does not define if someone is sick or healthy. These ultimate diagnostics decision can only be taken by medical healthcare professional using a fever thermometer on people detected with escalated body temperatures. 
There are some necessary points that must be kept in mind while conducting the thermal scan, like for example the person under scan, in front of the camera should have=
  • Face uncovered completely
  • No mask on face
  • No Glass or spectacles
  • No hair on forehead
  • No head covers

Similarly while using Thermal camera there are basic requirements that needs to be ensured regarding the equipment such as;

  • Emissivity of 0.98 is advisable
  • Distance should be within 8-10 feet approx.
  • Should be installed at location with no sunlight on camera lens or reflections on lens
  • No air conditioner grill or duct in front of the thermal camera
  • Height of camera should be adjusted considering the height of the shortest person

Testo range of instruments for thermal scanning

  • ThermalImager with Wi-Fi and Bluetooth testo 872: Hand held instrument and can be easily hand carried by the person doing the thermography. The image of the person with temperature data can be stored on the smartphone in the App via Bluetooth, and directly can be e-mailed to the concerned authority for further reporting/escalation if needed.
  • Thermal Imager with Tripod testo 882: Can be used manually by a person or can be mounted on a tripod.
  • Thermal Imager with Automated Monitoring testo 890: with tripod arrangement. This comes with alarm system – acoustic as well as visual alarm to alert if high temperature is detected in any person.
  • Non contact Infrared Temperature Screening Window IRISS ClearIR Series: Enables the temperature measuring device to be used from behind a secure and sterile  environment at a safe distance
Safety comes with responsibility
Implementation of thermal inspection looks the need of the hour and therefore it becomes the responsibility of facility management, decision makers, transportation authorities, regional and Public Health Care and security authorities, institutional heads, HSC officer of production plant etc to ensure the health and safety of the public, colleagues and other associates.
 

 

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