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Thermal Imaging Learning Center

Thermal imaging specialists. Contact us for on-site training
What is Thermal Imaging?
What is Thermal Imaging, or Infrared Thermography?
Thermal Imaging, or Infrared Thermography, is a noncontact technology that measures or “sees” infrared wavelengths emitted from objects, and then converts the temperature information into an image. The image features a color palette that represents a temperature range of the image displayed. Hot spots or a rise in temperature often indicate problems or potential failure. Thermal imagers are fully radiometric by measuring and storing temperatures at every point in the image.
Electromagnetic Spectrum
Infrared wavelengths are too long for the human eye to detect; it is part of the electromagnetic spectrum that we perceive as heat. All objects that have a temperature above absolute zero emit heat.
3 Critical Specifications of Thermal Imaging
Thermal Imager Temperature Range
1. Temperature Range
When selecting a thermal imager, evaluate the temperature range that will be suitable for your applications. For industrial applications, the temperature range is the number one specification to consider. Industrial thermal imagers feature a wider temperature range to accommodate facilities that have high-temperature equipment such as boilers and steam systems.
Thermal Imager Sensitivity (NETD)
2. Thermal Sensitivity (NETD)
Thermal sensitivity, or Noise-Equivalent Temperature Difference (NETD), measures the smallest temperature difference that a thermal imaging camera can detect in the presence of electronic circuit noise. Cameras with a low NETD will detect smaller temperature differences and provide higher resolution images with increased accuracy.
Thermal Imager Resolution
3. Resolution
Detector resolution plays a pivotal role in image quality of thermal imaging cameras. Higher resolutions provide precise and reliable measurements of smaller targets from further distances, creating sharper thermal images. The higher the detector resolution, the more accurate the camera. When evaluating between detector resolution and display resolution, be aware that the quality of the thermal image and its data is always determined by the detector resolution.
Thermal Imager Resolution 3600 pixels (60 x 60) Max temp = 111.2°F (44°C)
3600 pixels (60 x 60)
Max temp = 111.2°F (44°C)

Lowest Resolution.
Thermal Imager Resolution 14,400 pixels (120 x 120) Max temp = 133.1°F (56.2°C)
14,400 pixels (120 x 120)
Max temp = 133.1°F (56.2°C)

Lower Resolution.
Thermal Imager Resolution 43,200 pixels (240 x 180) Max temp = 152.3°F (66.8°C)
43,200 pixels (240 x 180)
Max temp = 152.3°F (66.8°C)

Mid Resolution.
Thermal Imager Resolution 76,800 pixels (320 x 240) Max temp = 160.6°F (71.4°C)
76,800 pixels (320 x 240)
Max temp = 160.6°F (71.4°C)

Higher Resolution
Thermal Imager Resolution 307,200 pixels (640 x 480) Max temp = 177.9°F (81°C)
307,200 pixels (640 x 480)
Max temp = 177.9°F (81°C)

Highest Resolution