Overheat detectors for commercial and military aircraft platforms

Thermocoax offers bleed air detector for leak detection in aircraft pneumatic duct systems and fire detector for monitoring overheat around EEC.

Any leakage in an aircraft’s pneumatic duct system can be detected via the increase in temperature of the surrounding air. The Thermocoax bleed air detector is designed to alert the crew to an overheat via the warning system. The detector is available in a fire detector version mainly aimed at checking overheat around EEC on the aircraft’s engine.

We also supply a detector that has the potential to monitor bleeds from the AGB oil duct in the engine nacelle. These nacelles are made of composite that can be damaged by a fuel leak.

Overheat detector for engines and electronics

Our overheat detection systems are suitable for use in engines, wings, air conditioning units and also hot air pipes from auxiliary power units. They have been installed on military and commercial platforms as well as on aircraft and helicopters. Thermocoax overheat detectors can also be employed in military tanks to identify overheating of electronic components.

NEGACOAX technology

The Negacoax technology developed by Thermocoax is designed to pinpoint the exact location of the overheat. Our overheat cabling is installed along the length of the air piping to facilitate this process. This overheat is then reported to the crew via the aircraft’s warning system. The overheat system will detect any air leaking in the wings, pylon, auxiliary power unit (APU) or nacelle.

A special chemical (eutectic salt] inside the cable is calibrated to cause a short circuit if exposed to an air leak. If the aircraft’s bleed air system fails, the eutectic salt in the cable will melt due to the overheat. This causes a drop in the electrical insulation levels. The alarm stops when the leak stops and the overheat has been resolved.

Those Aeronautic Programs use Thermocoax Detectors

Thermocoax Bleed Air detectors have already earned their stripes on the MD90, A340, the Global Express and current programs for Embraer KC390 and the Falcon F6X and F10X.

Overheat Detector : Technical Data

  • Service life of 20 years
  • Flight cycles: 30,000
  • Flight hours: 100,000
  • Fire qualified MIL-F-7872C
  • RTCA DO-160/MIL-HALT certification

For more information about Thermocoax Overheat Detector, please don’t hesitate to request a quote.