Freja 390

Freja 390

The Freja 390 benefits from IRnova’s leading T2SL technology and is accurate at extremely high temperatures. See through flames with highly advanced spectrum monitoring and watch even the hottest furnaces while maintaining stability.

Freja 390
Freja 390


The new Freja 390 detector filters out everything but a specific part of the spectrum to see through even exceptionally hot flames to make temperature measurements and provide for predictive maintenance in furnace and boiler installations. Freja is custom made for furnace inspections and can detect any number of faults, minimising costly downtime. 


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

General information


Gas & pollution detection





Pixel pitch:

30 μm

Typical detector

Spectral range:

3.8 - 4.1 μm

F number options:

F/1.2, F/2


10 mK

Pixel operability:

99.9 %

Frame rate:

60 Hz

Selectable frame rate up to 60 Hz supported

Proximity electronics

Supply voltage:

12 V

Maximum frame rate:

60 Hz

Selectable frame rate supported

Electrical interfaces:

Camera Link

Cooler control and proximity electronics included

IDDCA Parameters

Cooler options:

FS R405K

RM3 or K508 options available

Power consumption:

6 W / 11 W

Steady state / Cooldown

Cool down time:

4 min

Cooler voltage:

12 V

24 V cooler options available

Weight and dimensions:

550 g

71x57x142 mm

Cooler MTTF:

10 000 h

Environmental conditions:



Product leaflet


Freja 390


Building something new? Our evaluation kits have everything you need to try our detectors and design your camera system. They’re modular and include a power supply, frame-grabbing electronics, image acquisition software and optics.

Plug in and get going in minutes!

Technical characteristics described above are not contractual and may change without prior notice. This is revision 1.0.