Overheat Detectors

Fire and Overheat Detectors for Aerospace



Airline operators demand fire detectors that are highly reliable – the cost of a turn back due to false fire alarm is enormous. Our pneumatic detectors are highly immune to false alarms and require no scheduled maintenance.

Over 90% of western commercial aircraft are equipped with our failsafe fire and overheat detectors.

With a 50-year history in fire detection technology we can provide the right solution for your application including:

  1. pneumatic detectors
  2. thermistor detectors
  3. optical smoke detectors

pneumatic fire & detectors:

Designed for zones experiencing extremes of temperature and vibration our pneumatic detectors have the market-defining reliability. Mean Time Between Failure (MTBF) exceeds 500,000 hours.

How it works

The pneumatic detector has two sensing functions. When a rise in average temperature across the whole overheat sensor raises the pressure of the helium gas contained within the detector, an alarm is triggered. This design eliminates the risk of false alarm from individual hotspots. The detector also uses hydrogen to trigger an alarm when pressure increases due to highly localised heat caused by flame or hot gases.

Protection against internal faults is provided by an additional switch, held closed by the helium gas pressure. In the case of a leak, loss of gas pressure causes the integrity switch to open and signal a failure.


Airbus A320, 330, 340, 350, 380, Boeing 737, 767.

thermistor fire & overheat detectors:

Highly reliable

50-year history in cutting-edge thermistor technology.

Lower maintenance costs

With the ability to feed into an aircraft’s Integrated Vehicle Health Management (IVHM) system, our thermistor detectors can continuously monitor temperature to saves fuel and ensure lower maintenance cost.

How it works

As the ambient temperature in the detection zone increases, resistance of the detector cable decreases. When the resistance drops to a pre-determined value, within 5 seconds, the control unit activates a cockpit alarm.


Airbus A400M, Bombardier Global Express 7000, 8000, Learjet 85.

optical smoke detectors:

Thanks to dynamic discrimination of alarm conditions and next-generation digital signal processing, we can track smoke particles in real-time, enabling system optimisation and minimising aircraft certification risks.

How it works
Our optical detectors constantly analyse air in cargo compartments and avionics bays, discriminating between smoke and nuisance particles.

Detector threshold and overall system sensitivity can be adjusted to account for varying conditions during different aircraft operations, such as potentially higher levels of dust when on the ground or when cargo doors are open.

With unprecedented reliability and accuracy, the system gathers real-time intelligent data, and can optimise testing and improve installation design. When a true signal is detected, the system alerts the crew.

Boeing 777 Freighter, KC46 Tanker, numerous passenger/freighter conversions.

Model Name MCM-100
System Specification
Processor Intel Atom® x7-E3950 processor
Video 1x DisplayPort
Memory DDR3L 1066 SODIMM 2 GB
Storage Factory installed 128 GB mSATA SSD
Ethernet 2x GbE LAN (Intel® I210-IT)
Serial Port 2x COM (2 x RS-232/422/485)
USB 2x USB 2.0 + 2x USB 3.0
Mini PCIe 2x Mini PCIe card slots
Wireless Kit (option) Wi-Fi/4G LTE wireless Kit
Power Supply 6 ~ 36 VDC, Optional 40W AC/DC adapter
Vibration Measurement I/O Specification
Channels 4CH
Resolution 24-Bit
Max. Sampling Rate 128 kS/s
Input Range ±10V
Input Mode Diff/P-Diff
Input Coupling AC/DC
IEPE Excitation Current 0 or 2mA (IEPE compliance: 24V)
Over-Voltage Protection ±60V
DC accuracy – Offset Error Typical: ±0.15mV, Max. ±0.3mV
DC accuracy – Gain Error Typical: ±0.15%, Max. ±0.3%
System Noise 50 μVrms
-3dB Bandwidth 0.49 * sampling rate
AC Cutoff 0.4Hz (-3dB), 2.4Hz (-0.1dB)
Flatness ±0.01 dB (20 Hz to 1 kHz)
CMRR 60 dB (20 Hz to 1 kHz)
Crosstalk -100 dB
Dynamic Range 100 dB
SFDR 104 dB
THD -94 dB
THD+N -91 dB
Trigger Source Analog or digital, software selectable
Trigger Mode Post, delay, middle, pre-trigger, re-trigger
Auto-Calibration Yes
DIO 2 programmable function I/O
Dimensions 183 (W) x 110 (D) x 83.85 (H) mm
Construction Full Aluminum Alloy
Mounting DIN-rail/wall mountable
Operating Temperature 0 to 55°C (32 to 131˚F)
Storage Temperature -20 to 70°C (-4 to 158˚F)
Humidity approx. 95% @ 40°C (non-condensing)
Vibration Operating 5 Grms, 5-500 Hz, 3 axes w/ mSATA SSD
ESD Contact +/-4 KV, Air +/-8 KV
Shock Operating 100 G, half sine 11 ms duration w/ mSATA SSD
EMC CE & FCC Class B (EN61000-6-4/EN61000-6-2)

Additional information