FERREX LWIR Multispectral Thermal Camera — long-wave infrared thermal imaging for defence and perimeter surveillance
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FERREX

LWIR Multispectral Thermal Camera

"Every object above absolute zero emits heat. FERREX reads it — day or night, in any weather."

8–14
µm LWIR
Long-wave thermal infrared band
Multi
spectral
Thermal imaging with spectral discrimination
Stab.
Cooling
Accurate thermal performance
24/7
Passive
Total darkness — no illuminator required
View Technical Specs
View Technical Specs ↓
Spectral Position
UV–400nm
Visible400–700nm
NIR700nm–1µm
SWIR1–2.5µm
MWIR3–5µm
LWIR ← FERREX8–14µm
System Overview

FERREX is a multispectral long-wave infrared thermal camera operating in the 8–14 µm waveband — the region of the electromagnetic spectrum where all objects above absolute zero emit measurable thermal energy. Unlike visible-band and NIR cameras that rely on reflected light, FERREX detects the heat generated by personnel, vehicles, equipment and infrastructure directly. Darkness is not a limiting condition. Neither is the absence of any external light source. Where every other passive camera fails, FERREX continues to deliver operationally useful imagery.

The LWIR waveband (8–14 µm) is the most effective thermal imaging range for outdoor surveillance. It produces strong thermal contrast between objects and background at ambient temperatures typical of temperate and arid operating environments — the difference in emitted radiation between a human body and surrounding terrain is large, persistent and independent of ambient light conditions. FERREX exploits this physics with superior high-quality optical components, advanced embedded system software and state-of-the-art manufacturing — delivering multispectral thermal imaging performance in a package designed for demanding operational environments.

Stabilised cooling maintains the detector at a precise operating temperature, eliminating the thermal drift that degrades sensitivity and accuracy in uncooled systems over extended operation. A PC recording and analysis module completes the system — enabling operators to capture, review and analyse thermal imagery from a standard workstation, with no specialist third-party software required.

ISO 9001:2015
LWIR — 8 to 14 µm
Multispectral Thermal Imaging
Stabilised Cooling
Total Darkness Operation
Passive — No Illuminator
PC Recording Module
PC Analysis Module
Harsh Environment Construction
Advanced Embedded Software
8–14µm
LWIR Waveband
Peak thermal emission range for personnel and vehicle detection
24/7
All-Condition Operation
Darkness, overcast, fog — thermal emission is always present
Stab.cooled
Thermal Stability
Eliminates sensitivity drift over extended field operation
PCmodule
Recording & Analysis
Integrated software suite — capture, review and thermal analysis
Imaging Capability

What FERREX Detects — and Why Thermal Changes Everything

In the LWIR band, the camera does not see reflected light — it sees emitted heat. A person standing in total darkness, behind thin foliage, or in a vehicle produces a measurable thermal signature at wavelengths completely invisible to visible and NIR cameras. FERREX converts that thermal emission into a high-contrast image — consistently, regardless of ambient light conditions or time of day.

FERREX LWIR multispectral thermal output — false-colour filter bands 8021–14000nm
LWIR 8–14 µm
Passive Operation
Stabilised Cooling
Operational Conditions

FERREX Performance Across Every Environment

Thermal energy is emitted by all objects regardless of ambient light, weather or time of day. FERREX exploits this physics — maintaining operational imaging capability in conditions where every visible-band system fails.

Full Daylight
Excellent
Strong thermal contrast between personnel, vehicles and background. Heat-source identification straightforward at operational ranges.
Total Darkness
Excellent — Key Advantage
LWIR imaging is entirely independent of ambient light. Personnel and vehicles are as clearly visible at midnight as at midday — thermal emission does not diminish in the dark.
Fog & Mist
Good
LWIR wavelengths experience less scattering in moderate fog than visible light. Thermal signatures of personnel and vehicles remain detectable through conditions that render visible cameras ineffective.
Smoke & Dust
Good
Thermal emission penetrates light smoke and dust that completely obscures visible-band imagery. Critical advantage in post-incident environments or battlefield obscurant conditions.
Rain & Overcast
Good
Overcast conditions remove the thermal noise from direct solar illumination, often improving thermal contrast. Rain reduces performance at longer ranges but close-range detection is maintained.
Extended Range
Excellent — Heat Sources
Vehicle engines, exhausts and other heat sources produce strong LWIR signatures detectable at ranges well beyond those achievable with visible or NIR imaging in equivalent atmospheric conditions.
Technical Specifications

Engineering Data

Download Datasheet (PDF)
Parameter
Specification
Spectral Range
LWIR — 8 to 14 µmLong-Wave Infrared
Imaging Type
Multispectral thermal imaging — superior spectral discrimination within the LWIR band
Detection Principle
Passive thermal emission detection — no illumination source required. All objects above absolute zero emit LWIR radiation.
Optical System
High-quality LWIR optical components — optimised for maximum thermal sensitivity and image sharpness across the full field of view
Thermal Sensitivity
High thermal sensitivity — detects temperature differences between target and background at operational surveillance ranges
Image Quality
State-of-the-art manufacturing standards — superior image clarity maintained across all operating conditions
Parameter
Specification
Cooling System
Stabilised cooling — detector maintained at precise operating temperature for consistent sensitivity across extended operationStabilised
Cooling Benefit
Eliminates thermal drift in detector sensitivity — uncooled systems degrade in sensitivity as ambient temperature rises or changes; FERREX does not.
Long-Term Performance
Accuracy maintained over extended operational periods — stabilised cooling prevents performance degradation during sustained surveillance missions
Detector Type
LWIR-sensitive detector array — selected for maximum sensitivity in the 8–14 µm thermal emission band
Embedded Software
Advanced embedded system software — optimises detector performance, image processing and output in real time
Parameter
Specification
Operating Environments
Designed for demanding operational environments — harsh environment construction for field-deployed defence and surveillance use
Temperature Range
Extended operational temperature range — qualified for temperate, arid and cold climate deployment
Construction
Ruggedised housing — protects optical elements, detector and electronics from dust, moisture and physical shock in field conditions
Manufacturing
State-of-the-art manufacturing — ISO 9001:2015 certified quality management throughout production
Reliability
High-quality component selection and manufacturing process — designed for sustained operation in continuous surveillance roles without degradation
Parameter
Specification
PC Recording Module
Integrated PC recording module — continuous thermal imagery capture without third-party softwareIncluded
PC Analysis Module
Integrated analysis module — temperature measurement, false-colour mapping and scene review from standard workstation
Embedded Processing
Advanced embedded system software — real-time image optimisation, contrast enhancement and thermal normalisation
Operator Interface
Designed for defence and surveillance operator workflow — straightforward controls with minimal training requirement
Integration
Compatible with surveillance management systems and pan-tilt units — standard interface for integration into wider ISR architectures
System Operation

How FERREX Detects What
Other Cameras Cannot See

LWIR thermal imaging operates on a fundamentally different principle to every visible-band camera. It does not require light. It detects heat — and heat is always present, from every object in the scene, at every hour of the day.

FERREX LWIR optics — long-wave infrared lens system for thermal detection
8–14µm LWIR
PassiveNo Illuminator
Step 01 · Thermal Physics

No Light Required.
Heat Is Always
Present.

Every object above absolute zero (-273°C) emits electromagnetic radiation in proportion to its temperature. At ambient temperatures relevant to defence and surveillance operations, this emission peaks in the LWIR band — 8 to 14 µm. A human body, a vehicle engine, an aircraft, an equipment cache — all emit measurable LWIR radiation constantly, regardless of the ambient light environment. FERREX detects this emission directly, producing a high-contrast thermal image with no light source of any kind.

Why LWIR Outperforms MWIR for Ground Surveillance
↗
At ambient temperatures, objects emit far more thermal radiation in the LWIR band than MWIR — higher photon flux means better signal-to-noise ratio for passive ground surveillance.
◎
LWIR operates better in hazy and foggy environments than MWIR — longer wavelengths experience less atmospheric scattering, maintaining detection range in adverse conditions.
∞
LWIR thermal contrast between personnel and background terrain is strong and consistent — human body temperature (~37°C) stands out clearly against typical ground temperatures across all seasons.
8–14 µm — peak thermal emission range for ground surveillance targets
Fully passive — no illuminator, no active emission, no detectable signature
Total darkness operation — equivalent imagery at midnight and midday
FERREX LWIR multispectral output — real thermal false-colour imagery from multiple spectral filters
Stab.Cooling
AccuratePerformance
Step 02 · Stabilised Cooling

Consistent Sensitivity.
All Mission.
All Temperature.

Uncooled LWIR detectors are sensitive to their own operating temperature. As ambient temperature rises — during the heat of the day, after hours of continuous operation, or during transit in a warm vehicle — uncooled detector sensitivity drifts, producing inconsistent imagery and reduced detection range. FERREX addresses this directly with stabilised cooling, maintaining the detector at a precise temperature throughout the mission. Sensitivity is consistent from the first minute of operation to the last — regardless of ambient conditions.

Multispectral Thermal — Beyond Single-Band LWIR
01
Multispectral imaging within the LWIR band provides spectral discrimination between targets — distinguishing vehicle engine heat from body heat, or identifying material types by their thermal emission characteristics.
02
Spectral bands within LWIR carry different information about surface emissivity and temperature — combining multiple bands reduces false positives and improves identification accuracy.
03
Advanced embedded software processes the multispectral thermal data in real time — optimising contrast, applying false-colour mapping and flagging anomalous heat signatures for operator attention.
Stabilised cooling — consistent sensitivity independent of ambient temperature
Multispectral LWIR — spectral discrimination beyond single-band thermal systems
Advanced embedded software — real-time image processing and optimisation
MS Spektral manufacturing facility — ISO 9001:2015 certified production since 2014
PCRecording
PCAnalysis
Step 03 · Recording & Analysis

Capture. Store.
Analyse. Brief.
All in One System.

FERREX includes a fully integrated PC recording and analysis module — enabling operators to capture continuous thermal video, review recorded footage and perform scene analysis from a standard workstation. False-colour palettes, temperature measurement tools and contrast adjustment are all built in. No third-party software licences, no additional integration costs, no specialist analyst workstations — FERREX is operationally complete out of the box.

PC recording module — continuous thermal video capture
PC analysis module — temperature measurement, false-colour and scene review
No third-party software — operationally complete as delivered
Harsh environment construction — designed for demanding field deployment
Request a Capability Briefing
Capability Comparison

LWIR Thermal vs. Visible-Band Cameras — The Fundamental Difference

LWIR thermal imaging and visible-band cameras are not competing systems — they are complementary. But for night observation, perimeter surveillance and heat-source tracking, thermal is the primary capability. FERREX delivers where it matters most.

FERREX — LWIR Multispectral Thermal
  • Total darkness operation — equivalent performance at midnight and midday
  • Passive — no active illuminator, no detectable IR signature
  • Personnel, vehicle and heat-source detection in fog, light smoke and overcast
  • Stabilised cooling — consistent sensitivity over extended mission duration
  • Multispectral — spectral discrimination within LWIR, reducing false positives
  • PC recording and analysis module — operationally complete as delivered
  • Harsh environment construction — designed for field deployment
  • Lower spatial resolution than visible-band cameras at equivalent range
Standard Visible / NIR Camera
  • High spatial resolution and colour detail in adequate ambient light
  • Lower procurement cost for basic systems
  • Fails in total darkness without active IR illuminator
  • Active IR illuminator detectable by adversarial NV equipment
  • No heat-source detection — relies on reflected light only
  • Performance severely degraded in fog, overcast and rain
  • Cannot detect personnel concealed in thin vegetation or shadow
  • No thermal discrimination — cannot distinguish warm targets from background
Deployment

Where FERREX Operates

LWIR thermal imaging is the primary sensor technology for night observation, perimeter protection and sustained 24-hour surveillance wherever visible-band systems cannot be relied upon — and wherever passive, covert operation is essential.

Night Observation Posts

Fixed and mobile observation posts requiring 24-hour surveillance without active illumination. FERREX provides equivalent imagery through the full night-time period — personnel and vehicles detected at operational ranges from darkness onset to dawn.

Continuous 24-hour surveillancePassive — no IR illuminator

Perimeter Intrusion Detection

Critical infrastructure and installation perimeter surveillance — detecting personnel approaching or breaching the perimeter line through darkness, vegetation and adverse weather conditions that defeat visible-band CCTV systems entirely.

Perimeter monitoringHeat-signature alerting

Patrol & Force Protection

Ground patrol support and force protection — providing commanders with real-time thermal situational awareness of the operating area, detecting threats in cover, shadow and darkness without compromising patrol position with active illumination.

Patrol overwatchCovert passive operation

Heat-Signature Vehicle Tracking

Vehicle and equipment tracking by engine, exhaust and brake heat signatures — maintaining tracks through smoke, dust and darkness where optical systems lose contact. Particularly effective for vehicle identification and pattern-of-life analysis at extended range.

Engine heat trackingExtended range detection
Spectra™ Series

Other Systems in the Series

FERREX is one of six platforms in the Spectra™ Series — each engineered for a specific waveband, mission profile and operational scenario.

NOCTIS-V VNIR Low Light01
NOCTIS-V
VNIR Low Light Imaging System
APEX UAV Camera02
APEX
UAV Head Camera System
VANTAGE SWIR Zoom03
VANTAGE
SWIR Motorised Zoom Lens — 450mm
SPECTRA Hyperspectral04
SPECTRA
Hyperspectral Imaging System
SENTINEL Multi-Sensor EO06
SENTINEL
Electro-Optic Surveillance System
Next Step

Total Darkness. All Weather.
No Blind Hours.

Tell us your operational environment, required detection range and installation type — our engineers will confirm whether FERREX is the right thermal sensor for your surveillance programme and advise on integration options.

Request a Capability Briefing View All Spectra™ Systems

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