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Lately, videos and posts saying no contact thermometers can cause different problems including cancer and even hurting people’s eyes with the infrared light have become viral on different social media services.

However, thermometers do not emit laser beams, but instead have an infrared sensor that measures people’s temperature. Experts clarify these different myths.

If you are visiting a shopping centre and they take their temperature body with a pistol when entering, for prudence cover your eyes. Many times, those who use it are not sure where they are pointing.

In addition, the thermometer of these equipment works on the basis of a laser beam that goes and comes gathering the information to then generate the reading, but, it has been detected that not all of these pistols are properly calibrated to avoid that if by mistake aim at the retina do not hurt it, we will take care of our sense of sight.

Find more information about out infrared thermometers in general and any detailed information you need about this technology here at No Touch Thermometer. Contact us now if you want experts’ recommendations.

Full trust in no touch thermometers

Within the taking of constants, the measurement of body temperature is considered a non-invasive, fast procedure, in which the patient can be autonomous and that offers very useful information, so it is normal that this vital sign is increasingly measured and evaluated by the patients themselves.

Since the appearance of infrared thermometers (or laser thermometers as they are colloquially known) the market has been divided against the offer of thermometers with and without contact.

Both options offer advantages. The infrared thermometer is usually used in pediatric patients, poor collaborators or disoriented patients since they are fast, reliable and comfortable. Likewise, since there is no contact, they are a good option when there is a risk of infectious-contagious diseases.

The infrared thermometer or non-contact thermometer is made up of a sensor, an optical system and a calculation unit with algorithms. When taking the measurement, this thermometer is based on the premise that each body emits infrared radiation that varies with temperature, so what the thermometer does is measure these radiations and calculates body temperature using an algorithm.

The classic digital contact thermometer is another option for measuring temperature. These thermometers have a sensor at the tip of the device that measures the temperature and then displays it on an LCD screen. They are very comfortable since they are very manageable, can be stored in small places and are inexpensive.

Within contact thermometers we find two varieties, the tympanic and the front thermometer. Despite being contact thermometers, they make a much faster measurement than classic digital ones, because they use the energy emitted by the eardrum and the tissue around and the forehead respectively to perform an algorithm, which will result in temperature.

The choice of the thermometer that best suits the patient’s needs will depend on several factors:

  • Person who is going to perform the measurement: patient, family member or healthcare personnel.
  • Type of patient.
  • Device ergonomics, that is, the design it has and if it is easily manageable.
  • Easy to use.
  • Possible visual or hearing limitations of the person who is going to take the measurement.

It is interesting to take into account all these factors when choosing one variety or another, especially for patients who are going to perform the measurement at home. In the hospital environment, the infrared thermometer is being used more and more, this is because they are precise, fast, they do not need to be disinfected completely -depending on the model, it is enough to change the cap for individual use or pass a cleaning wipe between patient and patient- and also allow serial temperature measurements to be taken on the same patient in less time.

How does the infrared thermometer work?

The most basic design of an IR thermometer consists of a lens to focus the infrared (IR) energy from a pyrometer, which converts the energy into an electrical signal that can be displayed in units of temperature after being compensated for by the variation in room temperature. This configuration facilitates the measurement of temperature without contact with the object to be measured.

As such, the infrared thermometer is useful for measuring temperature in circumstances where thermocouples, Pt100 probes, or other contact temperature sensors cannot be used or do not produce accurate data for a variety of reasons.

Some typical circumstances are: where the object to be measured moves, where the object is surrounded by an electromagnetic field, such as in induction heating, where the object is contained in a vacuum or in controlled atmospheres, or in applications where a fast answer.

What should we keep in mind regarding my application when selecting an IR thermometer?

Important considerations for any infrared thermometer include field of view (target size and distance), the type of surface being measured (emissivity considerations), spectral response (due to atmospheric effects or transmission through surfaces), range temperature and mounting (portable infrared guns or fixed IR sensors). Other considerations include response time, environment, mounting limitations, display port or window applications, and desired signal processing.

What is meant by field of vision, and why is it important?

The field of view is the angle of view at which the instrument operates, and is determined by the optics of the pyrometer. To obtain an accurate temperature reading, the target being measured must completely fill the field of view of the instrument. Since the infrared sensor determines the average temperature of all surfaces within the field of view, if the background temperature is different from the temperature of the object, it can lead to a measurement error.

No Touch Thermometer offers a unique solution to this problem. Many No touch thermometers feature a patented switchable dot-circle laser. The circle mode of a built-in laser thermometer creates a 12-point circle that clearly indicates the target area being measured. In laser point-to-point mode alone, it marks the center of the measurement area.