HOWNIGHTVISIONWORKS
Updated: January 10, 2023

Thermal Imaging Devices-Ultimate Guide

Written by: Christopher Mark
Edited by: Mark Spence
Fact-Checked by: Patricia John

Thermal imaging devices are one of the most advanced tools used in the inspection and surveillance of buildings and other structures. These devices are used to detect the presence of heat or temperature changes in the environment. They are particularly useful for detecting areas of temperature change that may indicate the presence of a fire, electrical fault or other potential risk. This guide provides an overview of thermal imaging devices and how they work.

Thermal Imaging Devices: A Brief History

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Thermal imaging devices are an invaluable tool for a variety of industries, from energy efficiency to security. In this blog, we will examine the history of thermal imaging devices, from their origins to their current applications. 

Early Development of Thermal Imaging

The concept of thermal imaging began in the early 1800s when the British physicist William Herschel discovered the relationship between temperature and color. Later, in 1929, the Hungarian physicist Kálmán Tihanyi developed the first thermal imaging device, which was used to measure the temperature of objects. This device was known as the thermovisor. 

Rise of Infrared Technology

In the 1940s, the development of infrared technology led to the emergence of the first infrared cameras. These cameras used an array of detectors to capture images of infrared radiation emitted by objects. This technology was used by the military during World War II to detect enemy aircraft. 

Commercialization of Thermal Imaging

In the 1950s, the technology was commercialized and the first commercial infrared cameras were released. These cameras were used for a variety of applications, such as industrial temperature measurement, medical imaging, and security surveillance. 

Modern Applications of Thermal Imaging

Today, thermal imaging has become an essential tool for a variety of industries. In the energy efficiency industry, thermal imaging is used to identify areas of a building that are losing energy, helping to reduce energy costs. In the security industry, thermal imaging cameras are used to detect intruders in the dark, and in the medical field, thermal imaging is used to detect changes in tissue temperature, aiding in the diagnosis of diseases.

Types of Thermal Imaging Devices

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Thermal imaging devices are used in a variety of industries, from military applications to medical and industrial operations. These devices can detect infrared radiation, and provide an image based on the temperature differences between objects in their field of view. Depending on the application, there are different types of thermal imaging devices available.

Thermal Cameras

Thermal cameras are the most common type of thermal imaging device. They're often used in surveillance applications and can detect heat even in complete darkness. Thermal cameras have a wide range of features, such as adjustable resolution and sensitivity settings, as well as digital image stabilization. They can also be integrated with other systems, such as security cameras or motion sensors.

Infrared Sensors

Infrared sensors are small, lightweight devices that detect infrared radiation and convert it into an electrical signal. These sensors are commonly used in medical applications such as thermography or for monitoring temperature changes in industrial processes. Infrared sensors are available in a variety of shapes and sizes, including handheld models for portability or larger stationary models for fixed installations.

Thermographic Cameras

Thermographic cameras are specialized thermal imaging cameras with advanced features such as high-resolution images, extended temperature range detection, and powerful lens systems that allow users to zoom-in on objects from a distance. These cameras are commonly used for medical applications such as thermography to identify abnormalities or for industrial purposes to monitor temperature changes within a process or system. 

Thermographic Drones 

Thermographic drones use an onboard thermal camera to detect infrared radiation from far away distances. These drones can be used for a wide range of purposes, such as inspecting solar panels or identifying hotspots within a large area. Thermographic drones allow users to capture high-resolution thermal images without having to physically visit the location they’re inspecting. 

Thermal Imaging Rifle Scope

Thermal imaging rifle scopes are specialized devices that combine traditional rifle scopes with thermal imaging technology. These scopes are used by hunters and law enforcement to detect game or potential threats in complete darkness. Thermal imaging rifle scopes can detect targets from a distance and provide a clearer image than traditional night vision scopes. 

Thermal Imaging Monoculars

Thermal imaging monoculars are handheld devices that allow users to detect infrared radiation from far away distances. These devices are typically used by hunters, law enforcement, and search and rescue teams to identify potential targets or individuals in need of assistance. Thermal imaging monoculars are small and lightweight, making them easy to carry in a pocket or backpack. 

How Does Thermal Imaging Work? 

Thermal imaging devices work by capturing and processing infrared radiation from the environment around them. To do this, they have an array of infrared sensors that detect different levels of heat in order to create an image based on those readings. Different types of thermal cameras have different ranges and capabilities when it comes to sensing temperature. For example, some cameras are able to sense subtle changes in temperature while others may not be able to sense any changes at all unless they are extremely close to the object being observed. 

The data gathered by the sensors is then processed by a computer algorithm which creates an image based on the readings taken by the sensors. This image will show different shades or colors depending on how hot or cold certain areas are relative to others in the scene being observed. For example, if you were looking at a room with two people inside it, one person would appear as a bright red while another person would appear as cool blue depending on their respective temperatures relative to each other and their surroundings. 

Advantages and Limitations of Thermal Imaging Devices

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Thermal imaging devices offer a number of advantages over traditional temperature measuring methods such as increased safety, accurate measurements, non-contact measurement capabilities, and cost effectiveness; however, these advantages come with some drawbacks such as limited range, unreliable accuracy at long distances or when measuring small differences between temperatures across short distances, and expensive hardware requirements that can make them difficult to justify economically in certain applications.

Advantages of Thermal Imaging 

Increased Safety: 

Thermal imaging devices can detect temperatures that are unsafe or potentially hazardous for human beings and alert personnel in time to take corrective measures. This can be especially useful in hazardous industrial environments where workers may be exposed to high temperatures or dangerous substances. 

Accurate Measurements: 

Thermal imaging devices provide very accurate measurements of temperatures due to their ability to accurately measure small differences in temperature between objects. This makes them ideal for use in areas where precision is important such as medical diagnosis and industrial process control. 

Non-Contact Measurement: 

Thermal imaging cameras allow you to measure temperatures without having to physically touch the object, which can be beneficial in situations where contact with hot surfaces could cause burns or other injuries. 

Cost Effective: 

Thermal imaging devices are relatively inexpensive compared to other types of temperature measuring equipment, making them a cost-effective option for many applications. 

Limitations of Thermal Imaging 

Limited Range: 

The range at which thermal imaging cameras can accurately measure temperature is limited by the wavelength of the infrared radiation they use. This means that they can only measure temperatures up to a certain distance away from the camera, and they may not be able to detect objects that are too far away or too small for their sensors to pick up on. 

Unreliable Accuracy: 

Depending on environmental conditions such as humidity, wind speed, and other factors, thermal imaging devices may not provide accurate readings when measuring temperatures over long distances or when measuring very small differences between temperatures across short distances. 

Expensive Equipment: 

While thermal imaging cameras are relatively cost-effective compared to other types of temperature measuring equipment, they do require specialized hardware and software which can make them quite expensive when compared with simpler thermometers or thermocouples that require no additional hardware or software components for operation. 

Best Thermal Imaging Devices Brands In USA

Thermal imaging devices have revolutionized the way we understand our environment. They allow us to detect and analyze objects in the dark, or in areas where objects are hidden from view. With the rise of these new technologies, many brands have emerged in the USA that specialize in creating thermal imaging devices for various applications. In this article, we will discuss some of the best thermal imaging device brands in the USA.

Armasight

Armasight is one of the leading brands when it comes to thermal imaging devices. This company has a wide range of products ranging from handheld cameras to weapons sights and night vision systems. Armasight’s thermal imaging products are designed to provide users with clear images even in low-light conditions, making them ideal for military, law enforcement and surveillance applications. The company also offers a wide range of accessories such as weapon mounts, tripod stands and protective covers to ensure optimal performance.

Infiray

Infiray is a relatively new company that has quickly become one of the leading manufacturers of thermal imaging devices in the USA. They specialize in producing handheld monoculars and binoculars that feature advanced technologies such as digital zoom capability and image enhancement features which allow users to obtain detailed images even at long distances or under low light conditions. Infiray's products have been praised by users around the world due to their excellent features at an affordable price point.

AGM

AGM is another brand that produces a wide range of thermal imaging devices for various applications including hunting, law enforcement, surveillance, and night vision operations. Their products feature cutting edge technologies such as digital zoom capability and image enhancement features that allow users to obtain detailed images even at long distances or in low light conditions. AGM's thermal imaging products have earned them a reputation as reliable manufacturers of high-quality optics with excellent performance capabilities. 

Trijicon Electro Optics

Trijicon Electro Optics is a leading manufacturer of thermal imaging devices for both commercial and military applications. They specialize in creating monoculars, binoculars, scopes, and night vision goggles that feature advanced technologies such as digital zoom, image enhancement, and laser rangefinding capabilities. Trijicon's thermal imaging devices are renowned for their superior performance even under harsh conditions. 

Pulsar

Pulsar is another brand that specializes in producing top-of-the-line thermal imaging devices. Their products are designed for use in law enforcement, military, and hunting applications; they also offer a variety of consumer models designed for recreational use as well. Pulsar's thermal imaging devices are known for their durability and reliability, as well as their ease of use. 

ATN

ATN is one of the most well-known thermal imaging device brands in the USA. They specialize in creating high-end optics that are designed for use in military, law enforcement, and surveillance applications. ATN thermal imaging products are also popular among hunters and outdoor enthusiasts who need to be able to detect their prey even in the dark. ATN has been around for over 20 years, and their products are currently used around the world. 

Thermal Imaging Devices Applications 

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Thermal imaging devices have many applications across a variety of industries and can provide invaluable assistance in surveillance, diagnostics, hazard detection, and more. These devices are becoming increasingly popular due to their ease of use and ability to provide accurate readings even in difficult environments such as smoke or fog. 

As technology improves we will likely see even more uses for thermal imaging devices in the future so it’s important to stay up-to-date with the latest advancements in this field.

Surveillance: 

Thermal cameras are commonly used for surveillance due to their ability to detect heat sources at night or through smoke or fog. This makes them ideal for security purposes as they can detect suspicious activity without being detected themselves. They can also be used to monitor traffic or detect fires in remote locations. 

Diagnostics: 

Thermal cameras are often used for diagnostic purposes as they can identify faulty components or overheating equipment before any physical damage is done. This makes them invaluable tools for preventative maintenance and helps reduce downtime due to equipment failure. 

Hazard Detection: 

Thermal cameras can also be used to detect hazardous areas such as hot spots on electrical panels or areas with high levels of radiation. This makes them ideal for use by firefighters, police officers, and other first responders who may need to locate hazardous areas quickly and safely. 

Hunting:

Thermal scopes and thermal monoculars can also be used for hunting, as they can detect the body heat of animals or humans in the dark. This allows hunters to track their prey without the need for lights or other forms of illumination, making the hunt more efficient and effective.

Things To Consider Before Buying Thermal Imaging Devices

When shopping for thermal imaging devices, you can ensure that you get one that meets your needs and fits within your budget without sacrificing quality or features.

Thermal imaging devices are becoming increasingly popular for a variety of applications, from home security to industrial inspections. But before you buy one, there are some important considerations to keep in mind. This blog post discusses the factors that should be taken into account when shopping for a thermal imaging device.

What Is the Intended Use:

The first thing to consider is how you plan to use the thermal imaging device. Different models are designed for different purposes, so it's important to make sure you get one that will meet your needs. For example, if you're looking for a home security system, you'll need a device that can detect motion and provide clear images at night. If you're using it for industrial inspection, then you may need one with higher resolution and more detailed imaging capabilities.

What Type of Resolution Do You Need:

The resolution of the thermal imaging device is also an important factor. It determines how much detail can be seen in the images produced by the device. Generally speaking, higher resolution devices provide more accurate results, but they tend to be more expensive as well. You should consider what type of resolution is necessary for your intended use before making a purchase decision.

Do You Require Color Imaging:

Another factor to consider is whether or not color imaging is necessary. Some thermal imaging devices only produce black and white images, while others can produce full-color images as well. If color accuracy is critical for your application, then you'll need to look for a device that has this feature included. Otherwise, black and white images may be sufficient depending on your needs. 

What Is Your Budget:

Thermal imaging devices can range in price from a few hundred dollars up to thousands of dollars depending on the features and capabilities included in the model you purchase. Therefore, it's important to set a budget before you start shopping so that you don't end up spending too much money on something that doesn't meet your needs or exceed what you can afford. 

Are There Other Features That You Need:

Finally, make sure to consider any other features or capabilities that may be necessary for your specific application before making a purchase decision. Some thermal imaging devices have additional features such as temperature sensors or range finders which could be beneficial depending on what you plan to use them for. 

Objective Lens Diameter:

The objective lens diameter of a thermal imaging device is also an important factor to consider. The larger the lens diameter, the more light can be collected and the better the image quality will be. However, larger lenses also come with a higher price tag. You should consider your budget and how much detail you need to be able to see before deciding on the right objective lens diameter for your needs.

Night Vision Generation:

You should also consider the night vision generation of the thermal imaging device. Different generations provide different levels of clarity and detail in low-light conditions, so it's important to make sure you get one that meets your needs. Generally speaking, higher generations offer better image quality in low-light conditions, but they also tend to be more expensive.

Tube Diameter:

The tube diameter of the thermal imaging device is an important factor to consider. Larger tubes allow more light to be collected, resulting in better image quality and performance. However, they also tend to be more expensive than smaller tubes. Consider your budget and the level of detail you need before deciding on the right tube diameter for your needs.

Diopter Adjustment Range:

One of the most important things to consider before buying thermal imaging devices is the diopter adjustment range. This refers to the maximum and minimum amount of focus that can be adjusted on the device. It is important to make sure that the device has a wide enough range to accommodate different types of objects and distances. Different models may have different ranges, so it is important to check this feature before making a purchase.

Water Resistance Level:

When selecting a thermal imaging device, it is important to consider the water resistance level of the device. Thermal imaging devices are often used in wet environments, such as when inspecting roofs for leaks or surveying buildings for structural damage. As such, it is important to make sure that the device is able to withstand exposure to water and moisture. Look for devices that are rated for different levels of water resistance, such as IP67 or IPX-7.

Ratings:

When you’re looking to buy a thermal imaging device, it’s important to pay attention to the device’s ratings. Different devices will have different ratings, and they can range from basic models to advanced ones. Be sure to look at the device’s accuracy, sensitivity, and resolution. Additionally, you should also consider the device’s field of view and its ability to detect temperature changes over time.

Wrapping Up

Thermal imaging devices have become indispensable tools in the modern world. They are used for a variety of applications, from security to heat detection and thermal analysis. This guide has provided an overview of what thermal imaging devices are, how they work, and their various applications.

We have also discussed some of the advantages and disadvantages of using thermal imaging devices and outlined some precautions to take when using them. 

Finally, we have provided some tips on choosing the right thermal imaging device for your needs. From military operations to home security, thermal imaging devices can provide invaluable insight into temperature changes in any environment.

Frequently Asked Questions

A thermal imaging device is a type of night vision equipment that captures the upper portion of the infrared light spectrum, which is emitted as heat by objects. It can convert the captured infrared radiation into an image that can be viewed by the human eye, allowing the user to see objects or people in complete darkness or in environments with little to no visible light.

The benefits of using thermal imaging devices include the ability to see in complete darkness and low light environments, the ability to detect heat signatures, and the ability to see through obscurants such as smoke, fog or dust.

The range of a thermal imaging device can vary depending on the brand and model, but some high-end options can have a range of up to several thousand yards.

Thermal imaging devices usually have a resolution of at least 320x240 pixels and some high-end options can have a resolution of 640x480 pixels.

Thermal imaging devices can be used in low light environments, such as complete darkness, as they detect heat signatures rather than visible light.

Thermal imaging devices can detect a wide range of materials, such as people, animals, vehicles, buildings, and various types of equipment.

Thermal imaging devices can be user-friendly, but it may take some time to learn how to use all the features and settings.

Some thermal imaging devices are weatherproof, but it is best to check the specifications of the product before purchasing.

Some thermal imaging devices may require regular cleaning and calibration to ensure optimal performance. It is best to check the manufacturer's recommendations for specific maintenance requirements for the device you own.

Thermal imaging has several limitations, including its sensitivity to ambient temperature, its cost, and its resolution. The thermal imaging cameras are sensitive to the ambient temperature and the temperature of the surrounding objects, which can affect the accuracy of the image. Thermal imaging can be relatively expensive, especially for high-resolution, long-range cameras. The resolution of thermal imaging cameras is typically lower than that of visible light cameras.

Thermal imaging can be used during the day, but it is most effective at night or in low-light conditions. This is because thermal imaging detects the infrared radiation emitted by objects, which is not visible to the naked eye, and is not affected by the visible light.

The accuracy of thermal imaging can vary depending on the quality of the camera and the conditions under which it is used. High-quality thermal imaging cameras can provide highly accurate images, while lower quality cameras may produce less accurate images.

Thermal imaging cameras are not able to see through solid objects such as walls, metal, and some types of glass. It can detect the heat emitted by objects behind these materials but cannot provide a clear image.

Infrared thermometers take your temperature by measuring the infrared radiation emitted by your skin. These devices use an infrared sensor to detect the radiation, which is then converted into a temperature reading.
When you hold an infrared thermometer close to your skin, the device emits a beam of infrared radiation.
This beam is directed at the skin and it is absorbed by the skin and converted into heat. The infrared sensor on the thermometer detects the infrared radiation emitted by the skin and converts this into an electrical signal. The device then uses this signal to calculate the temperature of the skin.
Most infrared thermometers are designed to take your temperature by holding the device close to your forehead, which is where the temporal artery is located, which is a good indicator of your body temperature. Some infrared thermometers can also take the temperature of other body parts like ear canal, liquid and more.
It's important to note that the accuracy and performance of infrared thermometers can vary depending on the quality of the device, the conditions under which it is used, and the skill of the person using it.

Thermal imaging itself is generally not considered dangerous. The infrared radiation emitted by objects that thermal imaging cameras detect is not harmful to human health. However, the use of thermal imaging cameras may pose some safety hazards depending on the context in which they are used.
For example, using thermal imaging cameras in industrial settings may expose operators to potential hazards such as high temperatures, chemicals, and other dangerous conditions. In this case, the use of thermal imaging cameras should be done in accordance with proper safety protocols and guidelines.
Additionally, some thermal imaging cameras can be used in military and law enforcement situations, and the use of thermal imaging technology in these contexts could raise ethical concerns about privacy and civil liberties.
It is also important to be aware that thermal imaging cameras are not able to see through solid objects such as walls, metal and some types of glass, so it's important to use them with caution and with safety measures in place.
In general, thermal imaging is considered safe to use if it is used in accordance with proper safety protocols and guidelines and with caution.

Yes, thermal imaging can be used to detect wildlife. Thermal imaging cameras can detect the infrared radiation emitted by animals, making them useful for hunting, wildlife observation, and wildlife management.
The distance at which thermal imaging cameras can detect wildlife can vary depending on the specific model and its magnification capabilities. Some thermal imaging cameras are designed for long-range detection and can detect animals at distances of several hundred yards or more. Others may have a shorter range and are designed for closer observation.
It is also important to consider that the environment, weather conditions and the size and shape of the animal will also play a role in how far out you can expect it to work. For example, in open areas with few obstacles, a thermal imaging camera can detect wildlife at greater distances than in densely wooded areas with many obstacles.
It's also worth noting that thermal imaging cameras are not able to see through solid objects such as walls, metal, and some types of glass, so it's important to use them with caution and with safety measures in place.

Thermal imaging can detect temperature variations in the environment. It can detect the difference in heat emitted by objects and the surrounding environment.

Thermal imaging cameras are useful because they allow you to see what the naked eye cannot detect. They can detect temperature variations in the environment and also detect heat sources that may not be visible to the naked eye.

Thermal imaging cameras are used for a wide range of applications, such as detecting heat loss in buildings, locating hot spots in electronic circuits, and detecting people and animals in the dark.

Thermal imaging works on the human body by detecting infrared radiation emitted by the body. This radiation is invisible to the naked eye, but can be detected by a thermal imaging camera. By detecting this radiation, thermal imaging cameras are able to detect temperature differences in the body and detect any potential hot spots.

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