Freja 390

Superior furnace/heater inspection capability with the new T2SL (superlattice) technology. The highly uniform and stable 320x256 Freja array with 30 µm pixel pitch is combined with a high sensitivity optical configuration to create a truly sensitive detector.


The new Freja 390 detector takes advantage of IRnova’s T2SL technology breakthrough and wide optical aperture options (F/1.2 or F/2) to provide best-in-class gas detection capability. It is optimized for inspection and monitoring of high temperature surfaces and equipment in chemical and manufacturing industries and has its maximum sensitivity at 3.9 µm. The groundbreaking T2SL technology combines all the benefits of alternative detector materials (low NETD, excellent quantum efficiency, array uniformity and operability) without their drawbacks. Designing state-of-the-art optical gas detection and monitoring systems has never been so easy.


  • Optical gas imaging for any gas with absorption in the 3.9 µm range
  • Optimized for inspection of furnaces, heaters and boilers (see through flames)
  • Handheld and battery powered cameras
  • Mobile and stationary platforms

Typical performance

Technology T2SL
Format 320x256
Pitch 30 µm 
Spectral range 3.8 µm - 4.1 µm
Environmental conditions MIL-STD-810G
Steady state Power (20°C) 6 W
Weight 550 g
Dimensions 71x57x142 mm

Technical characteristics described above are not contractual and may change without prior notice.

For more detailed information please find downloads below:

Freja 390 product leaflet
Application note on T2SL technology 

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