How to understand if a professional infrared thermometer is correctly calibrated?


Within the current emergency situation caused by COVID-19, we are witnessing an exponential growth in body temperature measurement requirements at the “gates” of public and private structures, with the aim of identifying any alteration states, and therefore be able to perform a summary skimming between subjects at risk and not.

Consequently, infrared thermometers and thermal imaging cameras of various types and, above all, various qualities are spreading rapidly in the market.

How many times have we found ourselves in front of an electronic thermometer and doubted the reliability of its detection?

The accuracy of a thermometer may depend on the heat of the operator’s hand, on any incorrect pointing, but above all on:

  • The construction quality of the thermometer itself
  • The temperature of the environment in which the measurement is made
  • The quality and frequency of its calibration.


Is the Infrared Thermometer reliable?

The digital thermometer remains a fundamental device for the speed with which it detects the temperature compared to a simple thermometer of a different type.

Speed ​​is a necessary requirement, given the number of measurements to be detected in a very short time.

In light of today’s situation, however, an unreliable measurement is a risk that no operator can take, for reasons, both obviously and ethically, and of direct responsibility.

So what if a digital thermometer doesn’t work?

On the other hand, on the contrary, the danger is:

  • Overcrowding hospitals, already in great difficulty, without real need.
  • Administer unnecessary drugs and / or, in the worst cases, harmful to human health.

How can we make sure it’s working?

The solution to be sure that an IR thermometer is measuring correctly is the ITeR.

FDM ITeR – Professional calibration of an infrared thermometer directly on site

The FDM R&D Team has studied an innovative solution for Scientific Research, obtaining a tool capable of bringing together, in a unique form, safety, speed and simplicity of testing.

ITeR allows the operator to always have a professional but portable calibration tool in hand.

This solution ensures greater safety in airports, hospitals and access points to public places, where strict control of human health is necessary.

What is ITeR and how it works:

ITeR is a compact, portable and high-precision device that periodically checks, in real time, the measurement accuracy of thermometers and infrared cameras. With a temperature range ranging from ambient to 45 °, ITeR generates a reliable and constant reference over time.

Thanks to ITeR, the operator can verify, at any time, in the workplace, the operation of his measuring device, minimizing the risk of reading errors and therefore the occurrence of results that are not true to reality.

Here is the List of Infrared Thermometer you might be interested in

ITeR is an intelligent and easy-to-use device: in fact it has no display and connects via bluetooth to the Android or iOS APP for smartphones and tablets. Through the application you can set the setpoint, receive notifications of any alarms for very high / very low temperature and / or anomalies.

Thanks to the PID algorithm integrated in the system, maximum stability of the source is guaranteed. The effectiveness of the use of a distributed source allows excellent uniformity in the distribution of heat.

Let’s briefly explore this fundamental point.

The sensors used for an IR thermometer have a thermoplastic inside which converts the infrared rays into an electrical signal and therefore makes the temperature measurement available.

Due to the high dependence on the ambient temperature, there is also a reference sensor inside the case, often an NTC, which has a curve as in the following image:

Specifically, in the range between 25 and 30 degrees, the resolution is, increasingly, lower than the range between 10 and 20 degrees. This means that, at operating temperatures (between 20 and 30 degrees), the accuracy of the reference degrades exponentially.

For this reason, aiming the IR thermometer on a heat source at a known temperature can make it possible to compensate for the error due to the variation of the ambient temperature.

ITeR moves in this precise direction, offering a large surface that allows you to have a target at a known and settable temperature in order to continuously compare the result of the infrared thermometer with the value set in ITeR.

Why ITeR

ITeR is a device with unique features on the market.

There are, of course, tools for calibrating thermometers and IR cameras, but these are devices positioned differently in terms of pricing, which the calibration laboratories purchase to provide a service to third parties.

This means, for the operator:

  • pay for a calibration every time the requirement arises, not having the calibration device
  • long waiting times without being able to use your own instrument

Among other things, even if the calibration tool was purchased, it would still not be possible to perform the same directly in real time.

ITeR, on the other hand, was created to perform a quick, immediate calibration in the same space in which the measurement is made, for a potentially infinite number of calibrations, without losing anything in terms of performance, compared to a professional instrument.

ITeR can be easily placed on a desk, mounted on a stand or on a wall, according to the most comfortable configuration for the operator.




Please enter your comment!
Please enter your name here