What is Thermal Imager?

What is Thermal Imager?

Thermal Imager is known as a non-contact thermometer.  Thermal imaging is a technique for determining an object's internal temperature from a distance. With thermal imaging cameras, infrared light is used to detect radiation. Different color ranges identify temperature variations on an LCD screen, which commonly displays this information. Thermal imaging cameras are available in a wide range of sizes and capabilities, ranging from pocket-sized devices to high-end cameras that can measure temperatures in the thousands of degrees Fahrenheit range and produce crisper, higher-resolution images.

It is a technique that makes use of infrared and thermal energy to capture data about things to create photographs of them, especially in low-visibility conditions. It is a form of technology that has developed a diverse variety of applications over time. It is a particularly effective sort of night-vision technology, as it is capable of operating in complete darkness (as it does not rely on visible light), as well as in smoke, fog, smog, and haze.

How does thermal imaging work?

Thermal imaging is based on the physics of infrared energy (often referred to as "heat"), which all objects emit. This energy emitted by an object is also referred to as its "heat signature," and the amount of radiation emitted is often proportionate to the object's total heat.

Thermal cameras, or thermal imagers, are sophisticated devices made of highly sensitive heat sensors capable of detecting minute temperature variations. As they collect infrared radiation from items in a particular environment, they can begin mapping out an image based on the temperature data discrepancies and inflections.

Thermal images are often grayscale, with white representing heat, black representing colder regions, and various shades of grey depicting temperature gradients between the two. However, newer kinds of thermal imaging cameras add color to their photos to assist users in more clearly identifying separate objects - employing colors such as orange, blue, yellow, red, and purple.

Top Applications of Thermal Imaging Cameras

Top Applications of Thermal Imaging Cameras


What is a thermal camera used for?

Thermal cameras are used in many applications and they aren’t just restricted to household applications. Here are some of the most common applications of thermal cameras in a varied set of industries.

  • Electrical Wiring maintenance
  • Checking 3-phase equipment
  • First responders
  • Security
  • Animal Health
  • Mechanical Installations
  • Gas Detection
  • Many other applications

Electrical Wiring maintenance

Many separate physical connections exist between cables and various connectors, as well as between connectors and mounting studs on equipment, in electrical wiring. The low electrical resistance between the things connected by the connection is the indication of a high-quality electrical connection. This low contact resistance is necessary for continued electrical efficiency.


Electrical Wiring maintenance

Electrical power is dissipated when a current is sent through any type of resistor. Heat is the result of expended energy. When the connection's quality deteriorates, it effectively becomes an energy dissipation device due to the increased electrical resistance. A condition known as ohmic heating occurs when the resistance of the connector or joint increases. The thermographic camera is used by electricians and maintenance professionals to find hot spots in electrical panels and wiring. On a thermogram of the electrical panel, the heated electrical components appear as bright spots.

Checking 3-phase equipment

Three wires link three-phase electrical equipment to the power supply. The amount of the current flowing through each wire of the circuit should be equal. However, it is conceivable for the phases to be out of balance. In this situation, one of the phases' currents is notably different from the others. As a result, a temperature differential exists between the three connections. Thermographic cameras may readily and powerfully demonstrate this imbalance. Consider how thermography can evaluate overhead electrical connections or pole-mounted transformers from a remote, safe location on the ground.


Almost all military organizations across the world currently use thermal imaging technology in the form of integrated cameras, which are either installed on the individual's gear or vehicles. Thermal imagers have also become more popular in home security in recent years. Because the thermal picture can detect hotspots even in complete darkness, it is simple to detect intruders hidden behind shrubs or thin veils.

First responders

Because of their capacity to separate spots of interest from noise, thermal imaging cameras are a vital tool for firefighters. In other words, thermal imagers assist firefighters in seeing past the thick cloud of smoke and revealing what is beneath it. This is extremely useful in locating people trapped within a structure or identifying an access point for a rescue that has a low temperature.

Mechanical Installations (Preventive Maintenance)

Mechanical installations require precision or the machinery may be subjected to undesirable vibrations or undulating loads. A thermal imager can detect heat generated by forces such as friction. It provides information about the machinery's safety.

Gas Detection

In industries, infrared imaging is commonly employed to identify gas leaks. When an infrared camera is pointed at a surface with a gas leak, it reveals the temperature differential produced by pressure variation at the spot of the leak.

Animal Health

Heat is produced by red-blooded animals. When they are ill, their temperature frequently changes. Thermal imagers are used to assess the body temperature of animals and to verify if their surface temperature is uniform. These examinations are primarily performed on pets.

Many other applications

It is also used in many other applications such as Research, Chemical Imaging, Night Vision, Process Control, etc.

Fluke TiS20+ / TiS20+ MAX Thermal Imaging Camera

The Fluke TiS20+/TiS20+ MAX Thermal Imager (the Product or Imager) is a handheld infrared imaging camera that can be used for a variety of tasks. Equipment troubleshooting, preventative and predictive maintenance, building diagnostics, and research and development are examples of these applications. Thermal pictures are shown on a high-visibility, industrial-quality LCD touch panel. The Product saves photos to internal memory or an SD card, which may then be transferred to a PC via a direct USB connection or wirelessly to a PC or mobile device.Electrical Wiring Maintenance Using Thermal Imager

Figure: Electrical Wiring Maintenance Using Thermal Imager


The product comes with the Fluke Connect desktop software. Fluke Connect is a high-performance, professional software suite for quality analysis and reporting.

Key features

  • Continuous touchscreen IR-Fusion™
  • 5 hours battery life
  • Can face up to drop up to a pair of meter
  • Water and mud resistant—IP54 enclosure rating
  • Automatically organize and file thermal pictures with Fluke Connect™ quality Tagging
  • 120 x ninety infrared resolution

Infrared resolution

Fluke Ti300 PRO, Ti300+, Ti400 PRO, Ti480 PRO Infrared Camera

The Fluke Ti300 PRO, Ti300+, Ti400 PRO, Ti401 PRO, Ti450 PRO, Ti450 SF6, and Ti480 professional skilled Thermal Imagers (the Product or Imager) square measure hand-held, infrared imaging cameras to be used in several applications. These applications embrace instrumentality troubleshooting, preventive and prophetical maintenance, building medicine, analysis and development, and gas leak detection.

Key features

  • Increased sensitivity to visualize temperature differences
  • Easier to visualize and diagnose issues with sharper onscreen images, multiple rectangle markers, and 9 color palettes
  • The more intuitive visual interface, improved, user-tested, touch screen interface
  • More flexibility to visualize target, tiny-to-large with interchangeable smart lenses - no calibration required, 2x and 4x telephoto, wide-angle, and macro lens compatibility
  • Capture a clear, accurate image-focused throughout the field of view with MultiSharp™ Focus
  • Get an instant in-focus image of your designated target. LaserSharp® Auto Focus uses a built-in laser distance meter that calculates and displays the distance from your designated target.
  • Get 4x the pixel data with SuperResolution, which captures multiple images and combines them to create a 1280 x 960 image
  • Save time - wirelessly sync images directly from your camera to the Fluke Connect® system, and attach to an asset record or work order
  • Reduce the need to take notes in the field with IR-Photo Notes™ and voice annotations
  • Subject to Export Control


The advantages of using Thermal Imager cannot be described in a world. We can use it for Electrical Wiring maintenance, Checking 3-phase equipment, Security purpose, Mechanical Installations, Gas Detection, and Many other applications. Therefore, it is an important device throughout the world.