Infrared Thermometers: What Are They and How Do They Work?

An infrared (IR) thermometer, also known as a non-contact thermometer,  allows you to measure temperature quickly, from a distance, without making any physical contact. These devices, commonly used in industrial and commercial facilities, are simple and functional, making them ideal for environments or situations where conventional temperature measurement methods are impractical. They are used to measure an object’s surface temperature and are not suitable for determining its internal temperature as the infrared beam only bounces off the surface. While infrared thermometers are often used to locate overheated electrical circuits and equipment, they also have numerous other applications.

Let’s look into the working principles behind infrared thermometers to get a better understanding of how they work and how to use them.

How Do Infrared Thermometers Work? 

Although the technology underlying these thermometers is complicated, the concept is relatively simple. Everything with mass emits energy. The infrared thermometer employs infrared waves to determine the energy that is emitted in the form of heat. This is brought about by gauging the difference in IR rays emerging from the object and the surrounding environment.

Step 1: Detection: The thermometer’s lens detects the IR radiation from the object.

Step 2: Conversion: The thermophile converts the infrared radiation into a heat or electric signal.

Step 3: Processing: The electric signal is processed by the internal circuit of the thermometer. It calculates the temperature based on the strength and intensity of the IR radiation. The outcomes are then displayed as a numerical value on the digital panel in just a few seconds.

Why Select Infrared Thermometers? 

There are several reasons why you should consider using infrared technology to take temperature data. 

1. Accuracy 

Due to the advanced technology used in these devices, infrared thermometers have a remarkable reputation for precision. Therefore, when used properly, you can rely on the information provided by these devices with confidence.

2. Safety 

One of the most significant benefits of using an infrared (IR) thermometer is the ability to remotely monitor the temperature of a warm object without touching it. You can obtain all the necessary temperature information you need by simply pointing the thermometer at the item. 

3. Avoiding Contamination

Another reason to choose an infrared thermometer is that as a remote temperature measurement device, it helps to prevent contamination from germs. As it is contact-free, you can use the device to measure temperature without contamination concerns. It also does not have to be sterilized before each use. 

4. Durability

Infrared thermometers are strong enough to withstand the demands of any job site, workshop, or for extensive daily use. 

5. Memory Functions 

This feature, which is available on modern infrared thermometers, allows users to save multiple readings at the same time. As a result, there is no longer a requirement to record measurements manually.

When Can You Use Infrared Thermometers? 

You can use infrared thermometers in various situations, some of which are listed below: 

1. Industrial staff can use these thermometers to verify the temperature of a room before entering it.
2. Restaurants, particularly buffets, will use infrared thermometers to verify that the food is kept at the proper temperature for consumption. This method avoids cross-contamination that could occur when using a probe thermometer.
3. Mechanics use these thermometers to diagnose malfunctions and rectify overheating issues. They are also utilized to conduct routine spot checks to prevent breakdowns.
4. IR thermometers are used in quality assurance checks on assembly lines in manufacturing. They are also utilized for routine equipment checks to avoid equipment failures.
5. During the COVID-19 pandemic, IR thermometers gained immense popularity and demand in healthcare and other sectors alike. They became an essential tool in contact-free temperature monitoring, protecting doctors, medical personnel, and other frontline workers who were actively involved in community protection. Infrared thermometers enabled assessing people’s body temperatures while maintaining a one-meter distance which was crucial for pandemic control.

Visit the CETM eStore for the Best Quality Infrared Thermometers 

CETM eStore is a leading supplier of industrial and electrical measuring instruments in Singapore. We provide everything from compact infrared thermometers to digital multimeters to meet all your test equipment needs. If you are on the lookout for the best thermal cameras in Singapore or the best thermal scanners in Singapore, we have got you covered. Our offerings also include pre-sales demonstrations and product training for both our B2B and B2C clients. Contact us now to discuss your industrial testing requirements.