Thermography & NDT

Thermography & NDT

What is thermography?

All objects with temperature above the absolute zero (-273,15 °C or 0 K) emit heat radiation. The hotter the object, the more radiation is emitted. This radiation is also called infrared radiation since most of it is emitted in the infrared spectral band of the electromagnetic spectrum.

(Infrared) thermography is a non-contact imaging and temperature measuring technique. An infrared imager is used for detection and display of radiation within the infrared part of the electromagnetic spectrum.

The detector of the infrared imager detects and displays only the variations of radiation intensity. This results in an image where you can see the temperature variations of the scene.

The convertion of the collected radiation into temperature measurements is done internally in the infrared camera and/or via external online or postprocessing software. This convertion is a complex process where we use well know physical formulas and the radiation properties of the object, its surroundings and the atmosphere.

After all this processing your infrared camera generates an image where you can read the measured temperature, a so-called Thermogram. 

What is thermography used for?

Thermography is widely used in applications where contact-thermometry cannot be used to measure temperature. Various R&D applications (like medical, aerospace and remote sensing) use thermography as a non-contact temperature measuring and visualization technique. In the industry, NDT, predictive maintenance and condition monitoring of installations and equipment often use thermography. And thermography is even used in the Safety & Security market, where it is often used by firefighters or for perimeter control. 

 

What do we offer?

For thermography with uncooled LWIR bolometer cameras we offer our Gobi-640 and Serval series. Our Gobi comes in a high 640 x 480 (Gobi-640) resolution with a pixel size of 17 μm. The Gobi thermal camera series is available in two different sensitivity levels. We offer a 50 mK NETD and a 75 mK NETD version. The lower the NETD, the smaller temperature difference you can detect and measure. 

Our Gobi cameras are thermally calibrated in-house. We guarantee a temperature measurement accuracy of +/- 2 °C or +/- 2 %, whichever is the highest (ambient conditions apply).

Our cooled thermal cameras, also known as the Onca thermal cameras, are highly sensitive at approximately 20 mK NETD. Working in snapshot mode at high frame rates, you can capture very clear thermal images of fast moving objects. In case the standard framerate is still too low, you can reduce the window of interest which increases the frame rate further. The Onca thermal cameras are available in the MWIR and LWIR range. In the MWIR range, we have the high resolution 640 x 480 pixels with 15 μm pitch model as well as the lower resolution 320 x 256 pixels with 30 μm pitch model.  In the LWIR range, we have the 384 x 288 pixels with 24 μm pitch model.  The Onca cooled thermal cameras come with GigE Vision and cameralink interfaces. 

SWIR cameras can also be used for high temperature thermography. We offer temperature calibration for target temperatures above 300 °C with our Xeva (320 x 256 resolution) and Cheetah (640 x 512 resolution) cameras. 

What features are needed?

  • Temperature Measurement Accuracy +/- ≤ 2%
    Describes the accuracy of the thermal measurement. The lower the deviation, the higher the accuracy of your measurement.
  • High thermal sensitivity
    Thermal cameras need to have a high sensitivity level (low NETD) to detect the smallest temperature differences
  • High frame rate
    The higher the frame rate, the faster you can do your thermal measurements.
  • Easy connectivity
    We offer several different interfaces for an easy integration into your system
  • Protection grade
    We offer cameras with an IP rating up to IP67 for thermal imaging in harsh environments

Are you looking for more information? 

Let us know. We are happy to help.

Contact us

Documents

Press Releases
Xenics is extending its range of products to the security and high end thermography markets Xenics is extending its range of products to the very promising, high-volume security and high end thermography markets (2010)
Xenics at Vision 2009: presenting new IR technology for machine vision and fever detection system At Vision 2009 we demonstrate a digital recording and image analysis package, that we have developed together with Quadrox. Goal of this system is to (automatically) detect fever in public places.
SWIR thermography using the world's fastest SWIR camera The world's fastest SWIR camera Cheetah-640CL brings high temperature measurement innovation to the high-speed thermogaphy market dominated by Midwave Infrared technology
Application notes
SWIR cameras are perfectly suited for high temperature thermal imaging applications. SWIR cameras are useful tools for high temperature thermal imaging applications.
Thermal electronics inspection Xenics thermal cameras can detect heat defects in electronics before qualification, saving a considerable amount of time and money. The cameras can also be used for critical control of heat dissipation in a working instrument to optimize its life-cycle.
Whitepapers
Thermal imaging for monitoring rolling element bearings To be reliably operated off-shore wind turbines need an assured downtime and maintenance pattern to keep costs low. A monitoring project carried out by the authors uses an infrared (LWIR) thermal camera placed in the drive trains of such turbines and focusing on their spherical roller bearings.

World's first InGaAs camera photon emission microscope

Xenics enabled Semicaps to realize the world's first InGaAs camera photon emission microscope in 2004. Since then Xenics and sInfraRed have supported us in our endeavors for better sensitivity and resolution in photon and thermal emission microscopy.

Chua Choon Meng, CEO Semicaps