Defense & Security
ALCEN has been a key supplier of French strategic defense for over twenty years. The group also manufactures equipment for French National Navy vessels and is a leader in active imagery and other technologies.

ALCEN has been a key supplier of French strategic defense for over twenty years. The group also manufactures equipment for French National Navy vessels and is a leader in active imagery and other technologies.
Vision, Inspection & Localization
Some of our relevant subsidiaries:
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For 30 years, LERITY (formerly LHERITIER) has been designing and manufacturing complex cameras and vision systems, capturing images in the visible spectrum. Through an ambitious policy of research and development, notably in the field of sensors and algorithms for real-time image improvement, LERITY has reached a level of excellence in the quality of image restitution, and is today a recognized expert in low light levels.
LERITY is both an OEM for recognized international actors in optronics and vision systems and a company at the forefront of innovation, notably in active imaging via its CAT EYE camera. LERITY can adapt itself to the specific needs of its customers: whether they be industrial companies, security forces or military forces.
Its reputation has notably been established in 3 markets, both in France and internationally:
- Defense & Security: day channel for vehicle-mounted optronic system, perimeter vision, cameras for submarine periscope, day/night coastal surveillance, shooting range metrology, day/night vision camera with CAT EYE active imaging
- Aeronautics: head-up display camera (HUD), taxiway camera, cargo-monitoring camera, cockpit camera (CIRS)…
- Railway: on-board retrovision systems (SNCF), guidance for tramways and buses, camera assistance in automatic driving
Campus Saint Christophe
10 av. de l'Entreprise – Pôle Magelan 2
95862 Cergy Pontoise
France- Website
- Contact
- Location on map
- +33 (0)1 34 24 38 20
LERITY on ALCEN's website
Defense & Security Vision, Inspection & Localization
Defense & Security Engineering, Maintenance & Services
Energy Nuclear
Aeronautics & Space Vision & Inspection
CAT EYE camera
A hand-held camera with high-performance day/night vision, CAT EYE offers defense and security forces an alternative to the infrared and identification technologies available up until now.
With unique high-resolution observation capacity (FULL HD), CAT EYE gives clear, natural vision day and night, enabling facial identification at over 200 meters, as well as the capacity to observe moving scenes and the identification of potential threats at over 5 kilometers.
Its unique Active Imaging mode enables the identification of an individual or vehicle at night; it also improves the quality of vision in rain, fog or intense pollution. All of the features of a modern hand-held camera (telemetry, GPS, recording and internal replay) make this technological gem an unrivaled asset for reconnaissance and observation missions at a safe distance.
Since its launch in 2015, CAT EYE has received excellent feedback from domestic security and military forces and has undergone in-depth testing. It is sold in several countries including France. CAT EYE is available in a hand-held version (camera only), or combined with a stabilized tracking system (PTZ) to conduct surveillance missions that are either remote, stationary or on board vehicles or naval platforms.








Vision systems
LERITY designs and manufactures HD cameras to be installed on ground defense platforms or on surface vessels. Fitted with high-resolution sensors designed for day (HD Visible Channel) and for night (Intensified Visible Channel or Low Light Level), they are also extremely robust. Embedded image processing enables them to provide reliable solutions, fully integrated into the client's architecture.
Each year, LERITY produces several hundred cameras equipping the visible channels of major optronic equipment, installed on land vehicles or on fixed optronic platforms.
LERITY works with numerous vehicle manufacturers (Elbit, Renault Trucks, Nexter, Leonardo, Lockheed Martin, THALES, Safran, etc.) and equips the main test centres of the DGA (the Defense procurement and technology agency of the French government).
LERITY's cameras are deployed on the vessels the SSM Scorpène, the SNLE Barracuda, the SSM Sauro and their export versions, the submarines of the French and Italian Navies, and are present on a daily basis in every sea in the world.

Naval & Submarine
Some of our relevant subsidiaries:
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ALSEAMAR designs, manufactures and operates naval and underwater products (subsea gliders, unmanned surface vehicles, swimmer delivery vehicles, underwater acoustic positioning equipment, naval radio communication systems, deep-water pure syntactic foam buoyancy products) and is a provider of numerous services (underwater and marine monitoring, inspection, maintenance and upgrade of naval weapon systems, training).
ALSEAMAR's commitment to its customers relies on the high skills and reactivity of its 100 members of personnel, including over 50 engineers and 30 senior technicians, ready to be mobilized for projects all around the world.
Main Product Lines
- Underwater and surface robotics
- Radio frequency communications
- Underwater passive acoustics
- Underwater vehicles for divers
- Deep-water syntactic foam buoyancy materials
Main Services
- Life-extension services for orphan and/or old naval systems
- Marine survey services using subsea gliders and unmanned surface drones
- Localization of aircraft or submarine black boxes in the event of an accident at sea
- Training and instruction
ALSEAMAR on ALCEN's website
Defense & Security Naval & Submarine
Defense & Security Engineering, Maintenance & Services
Energy Oil & Gas
Aeronautics & Space Engineering & Maintenance
Acoustic positioning system
ALSEAMAR designs and manufactures portable trajectography systems for mobile submarine vehicles, torpedoes or drones, under the GIB product line.
Consisting of a control unit and a set of buoys, they receive the signals transmitted by the acoustic transmitter mounted on the submarine being tracked. The buoys measure distances and use a local radio network to periodically transmit their GPS position and the distances measured to a control unit installed on a support or land vehicle. This unit triangulates the positions of the subsea vehicle and displays them on a board in real time and with very high precision.
GIB portable trajectography systems are used by manufacturers in the naval sector to qualify their subsea machinery and by navies to train their crews and intervene in the event of a stricken submarine in order to locate it accurately.

Expendable GPS/AIS buoys for submarine communications
ALSEAMAR X-SUB buoys allow submarines to communicate with above the sea’s surface without raising a periscopic communications antenna. The submarine continues its course, undetectable at its operational depth.
The X-SUB buoy is a device released via the standard ejector (sippican). The buoy then rises to the surface and remains connected to the submarine via a wire connection.
The buoy acquires the GPS and the AIS positions, which are transmitted to the submarine. The GPS and the AIS positions are visible on board the submarine on a designated operating unit screen.
Once the wire connection is broken, the buoy automatically scuttles and sinks.










Manned submarine propulsion vehicle
ALSEAMAR designs and manufactures subsea propulsion vehicles used to transport frogmen (2 to 6 combat divers, depending on the type of vehicle) during special operations: expansion of their scope of operations, strategic target attacks on land and at sea, infiltration or exfiltration of commando units, intelligence, surveillance and reconnaissance, and maritime counter-terrorism.
ALSEAMAR's manned submarine propulsion vehicles are ergonomic to avoid diver fatigue and have high endurance, navigation accuracy and communication and observation capabilities. They can be deployed from the shore, boats or submarines using a deck shelter. They have a large loading capacity and are easy to use.

Radio communication antenna system
ALSEAMAR designs and manufactures multi-purpose antennae for submarines, covering a wide range of frequencies from VLF to UHF and equipped with satellite communication.
Installed in a particularly compact hoisting mast, the antennae enable the simultaneous emission and reception of several frequencies, despite their small size.
ALSEAMAR antennae are compact while ensuring high levels of performance and are particularly suited to the requirements of subsea communication.
ALSEAMAR also has many years of experience in the design, simulation, manufacturing and characterization of antennae for vessels (active and passive antennae covering different frequencies: VLF/LF, HF, V/UHF, UHF) and high-performance multi-couplers to dispatch input/output signals. These antennae and multi-couplers can be used to create a subsystem of antennae for surface vessels that incorporate the strictest equivalent radar surface reduction requirements.

Subsea glider
ALSEAMAR designs, manufactures and operates autonomous, high-endurance subsea drones: the SeaExplorer gliders.
Designed to collect data over large areas (thousands of kilometers), over long periods (months) and at great depths (up to 1,000 m), SeaExplorer gliders are propelled by buoyancy variation. SeaExplorer vehicles silently glide along the water column, collecting physical, chemical, biological and/or acoustic data, depending on the sensors installed. Their major added value lies in their low procurement and operating costs compared to the vessels or other means traditionally used for the same type of mission.
SeaExplorer gliders are easy to operate and can be deployed and recovered by a smaller crew, using small boats in coastal waters. Remotely controlled via satellite communication, they receive orders from the control PC at an ALSEAMAR site or at another designated site and transmit navigation information and collected data to land.
SeaExplorers are used by scientists and oceanographers, by environmental agencies responsible for protecting seas and oceans, by operators in the oil sector and by navies.
ALSEAMAR operates Gliders for its clients 24/7 in every sea of the world.








Subsea light vehicles
The MURENE Subsea light vehicles are a new grade of subsea diver propulsion systems. They have been designed to provide the best ergonomics and performance standards for combat swimmers. They can be deployed from the shore, a boat or a submarine. A large cargo capacity, high navigation accuracy and excellent swimmer protection are the key strengths of these vehicles.
Equipped with the latest generation of fibre optic gyroscope navigation systems combined with a DVL, the MURENE can lead offensive operations in coastal zones and shallow waters in order to neutralize maritime or land targets. Their small size and easy maneuverability make them the perfect tool to furtively approach targets as close as needed.












Surface drones
ALSEAMAR designs and produces smart, stand-alone, multi-tasking surface drones, SeaSurveyor USVs.
Equipped with obstacle avoiding detection sensors, WiFi communication and acoustic sensors, SeaSurveyor USVs can carry other loads depending on the applications required by the user. They can navigate in packs completely autonomously in order to coordinate their research without human intervention.
These multi-mission stealth vehicles (USSVs) dedicated to military operations are easy to use. Their configurations can be adapted to each mission. They are sturdy and easy to deploy by one or two individuals, easy to transport and can be navigated independently of the mother ship towards the area of interest, generally several nautical miles away. USSVs enable operational missions to be carried out in regions where special forces are deployed thanks to built-in sensors (video or photo camera, or IMSI catcher).

Simulation
Some of our relevant subsidiaries:
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With over 20 years of existence and experience, ITHPP has become the French leader in high-pulsed power and high-power microwave technologies.
Driven by customer specifications, ITHPP designs and manufactures highly adapted and innovative systems linking the technologies to scientific research, civil and military applications.
High Pulsed Power technologies allow the amplification of electrical power delivery over a shorter burst duration. Since energy is the product of power over time, by maintaining a constant flow of energy and reducing the duration of the pulse it is possible to achieve powers in excess of a hundred Gigawatts.
High Powered Microwaves are very highly charged electromagnetic pulsations capable of disturbing and even destroying electronic components used in increasingly complex systems. The interest in these high powered microwaves are due to the vast array of usages, varying from more classic usages (Radar types) to more advanced technologies, such as those used in Electronic Warfare.
ITHPP on ALCEN's website
Defense & Security Airborne drone & vehicle stop
Defense & Security Simulation
Medical & Healthcare Sterilisation
Behavioral studies of materials under very high pressures
ITHPP designs, develops and manufactures a line of generators to perform isentropic compression testing of materials.
ITHPP is the only company in the world with the expertise to precisely study the behavior of materials subjected to extreme dynamic pressures, particularly that of projectiles moving at speeds superior to 10 km/s. Such speeds are unachievable using other experimental means.
Due to its high-performing equipment and technologies, ITHPP is able to conduct research on the impacts of hyper-speeds that can be applied to the following fields:
- Defense & Security: Development of armor
- Space: Impact of micrometeorites on satellites
- The physics of explosives
- Materials research: Determining equations of state at extreme pressures (around a million bars)

Lightning simulator
ITHPP has developed the means of simulating the effects of direct and indirect lightning strikes. It’s use can be adapted to fit a variety of specifications.
ITHPP designs and manufactures ready-to-use test equipment, in line with existing standards or built to meet specific customer performance requirements (electrical, environmental or those pertaining to size or mobility).
ITHPP’s technologies are ideal for testing aircraft resistance to lightning strikes. In particular, this makes it possible to study the behaviors of composite materials, which react very differently than more regular metals during a lightning strike.












Airborne drone & vehicle stop
Some of our relevant subsidiaries:
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With over 20 years of existence and experience, ITHPP has become the French leader in high-pulsed power and high-power microwave technologies.
Driven by customer specifications, ITHPP designs and manufactures highly adapted and innovative systems linking the technologies to scientific research, civil and military applications.
High Pulsed Power technologies allow the amplification of electrical power delivery over a shorter burst duration. Since energy is the product of power over time, by maintaining a constant flow of energy and reducing the duration of the pulse it is possible to achieve powers in excess of a hundred Gigawatts.
High Powered Microwaves are very highly charged electromagnetic pulsations capable of disturbing and even destroying electronic components used in increasingly complex systems. The interest in these high powered microwaves are due to the vast array of usages, varying from more classic usages (Radar types) to more advanced technologies, such as those used in Electronic Warfare.
ITHPP on ALCEN's website
Defense & Security Airborne drone & vehicle stop
Defense & Security Simulation
Medical & Healthcare Sterilisation
Airborne drone neutralization
ITHPP manufactures and markets drone neutralization systems. They can be operated from several hundred meters away and allow it’s their operator to take control of the drone from its pilot.
These mobile or fixed systems are a direct response to the security threat posed by the proliferation of UAV’s and complement already existing detection solutions.
For example, the ITHPP portable and autonomous "microwave rifle" is able to jam all communication protocols used by drones. It allows its operator to fulfill his or her mission in any type of environment, including around critical events and infrastructures.

Electromagnetic vehicle barrier
ITHPP designs and manufactures a system capable of stopping an engine (cars, trucks, boat outboards…) through the emission of electromagnetic waves.
Restarting of the engine remains impossible as long as the system continues to emit the electromagnetic waves. The system can be operated from a lightweight vehicle and is capable of operating autonomously.
It is intended for use by security forces (police, armies, border control, customs, internal security…) to counter organized crime and terrorism.

Mechanical & electronic components
Some of our relevant subsidiaries:
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ADR designs, produces and sells high-precision ball bearings in a wide range of sizes (from a 1 mm bore to a 330 mm outside diameter).
These highly sensitive bearings are found in viewfinders, gyro-stabilized systems, optoelectronic and avionics equipment, infrared pointers, encoders, motors, etc.
ADR, as a subsystems developer, develops and offers integrated technical solutions, adding many functions to the bearings.
ADR also designs and produces actuators specifically adapted to highly complex systems.
ADR on ALCEN's website
Defense & Security Mechanical & electronic components
Energy Oil & Gas
Aeronautics & Space Mechanical components
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For over 40 years, TRONICO has specialised in the design and integration of electronic systems for high added value equipment, throughout its life cycle.
As well as its core business of EMS (Electronic Manufacturing Services), it positions itself as an ODM (Original Design Manufacturer) in the development of complex electronic dominance systems.
Relying on its experienced R&D team and its partnerships, TRONICO develops complete systems that incorporate complex physical phenomena and their associated electronics. Over the years, and through its experience, TRONICO has forged strong links with scientific and technological partners that enable it to research and analyse global and innovative solutions (physical, electronic, mechanical, IT and other principles).
It is organised into "business units", adapted to the needs of its target markets: aeronautics, defence and security, energy, rail, industrial and medical. This optimum organisation encourages technological, technical and functional synergies between markets.
26 rue du Bocage
85660 Saint-Philbert-de-Bouaine
France- Website
- Contact
- Location on map
- +33 (0)2 51 41 91 35
TRONICO on ALCEN's website
Defense & Security Mechanical & electronic components
Energy Engineering, Maintenance & Services
Aeronautics & Space Electronic components
Aeronautics & Space Engineering & Maintenance
Medical & Healthcare Mechanical & electronic components
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To be at the cutting edge of electronic component technology, TRONICO set up a component engineering laboratory in 2000 to ensure the reliability of current designs and come up with the technological solutions of tomorrow.
TRONICO has developed a vast library of programmes and acquired considerable experience in the medical, energy, aeronautics, defence and security and transport fields.
In 2017, the component engineering laboratory became Tame-Component.
Tame-Component offers the following services:
- Entry control
- Construction analysis
- Component characterisation
- Life testing
- Obsolescence management
- Long-term storage
Tame-Component also offers the following solutions:
- Obsolutions
- RoHS
- Qualification
- Up screening
- Reliability
- Failure analysis
Tame-Component on ALCEN's website
Defense & Security Mechanical & electronic components
Energy Engineering, Maintenance & Services
Aeronautics & Space Electronic components
Medical & Healthcare Mechanical & electronic components
Electromechanical precision subassemblies
ADR designs and manufactures complete electromechanical subassemblies using its technical skills and expertise in the field of optronics.
In order to improve compactness and performance, ADR integrates the electromechanical functions as close as possible to the bearings with the engines, encoders, structures, wiring, electronics, connectors, etc.
ADR associates the quality of its production tool with its capabilities and its expertise for precision assembly and thus guarantees repeatability and full control of subassembly performances.
ADR has already demonstrated its abilities in this field, designing and manufacturing electromechanical positioners with carbon composite structures, motorised bearings, hollow-shaft servomotors, etc.










High-precision ball bearings
Miniature and annular bearings for specific environments
ADR designs and produces a wide range of high-precision ball bearings that comply with the most demanding technical specifications and are EN9100 certified.
The materials, liquid or solid lubricants and manufacturing processes are qualified and proven. The ADR range of bearings is extensive – from 1 to 330 mm and up to ABEC 9 (ISO 2) – and guarantee high reliability and resistance in the most restrictive environments: vibration, thermal, climatic, speed, etc.
ADR ball bearings are present in a lot of equipment incorporating observation or guidance functions (optronics, viewfinders, navigation, missiles, etc.).








Integrated bearings
ADR designs and manufactures a range of matched ball bearings preloaded solidly to give the best compromise of stiffness and friction torque while optimising the weight, dimensions and cost of the equipment.
This special design guarantees a stable system over a wide temperature range, limiting faults and geometric dispersions. Combined with assembly and final inspections in a clean room, it ensures high precision and high positioning repeatability. ADR offers controlled sealing solutions, ensuring management of friction torque and leak rate.
These integrated bearings are used by the main equipment manufacturers in Defence around the world, for products such as gyrostabilised pods, viewfinders, observation systems, etc.








Safety mechanisms
ATMOSTAT designs, justifies and manufactures a range of effective safety device solutions.
The ATMOSTAT "safety device" unit works on various types of component:
- aeronautical non-return valves
- subsea safety valves
- tank lids

Electronic boards
TRONICO facilitates, optimises and handles, within the context of an electronic assembly industrialisation service, the transfer of prototypes to mass production:
- Purchasing/procurement FMECA*: TRONICO manages risk and obsolescence through purchasing FMECA and its market knowledge
- Process FMECA*: TRONICO evaluates and manages production risks through the process FMECA
- DfX
- DfM (Design for Manufacturing): analysis of manufacturability of boards and integrations
- DfT (Design for Test): definition and optimisation of the testing strategy
- Design to cost: design methodology at objective cost
(* Failure Mode, Effects and Criticality Analysis)

Testing, storage and obsolescence management of electronic components
TRONICO relies on the expertise of its electronic component engineering laboratory in order to improve the reliability of current designs and to come up with the technological solutions of tomorrow within its component engineering laboratory.
Founded in 1990, the TRONICO component technology department has a vast library of programmes and considerable experience in the medical, energy, aeronautics, defence and security and transport fields:
- Entry control
- Construction analysis
- Component characterisation
- Life testing
- Obsolescence management
- Long-term storage

Engineering, Maintenance & Services
Some of our relevant subsidiaries:
- read more
ALSEAMAR designs, manufactures and operates naval and underwater products (subsea gliders, unmanned surface vehicles, swimmer delivery vehicles, underwater acoustic positioning equipment, naval radio communication systems, deep-water pure syntactic foam buoyancy products) and is a provider of numerous services (underwater and marine monitoring, inspection, maintenance and upgrade of naval weapon systems, training).
ALSEAMAR's commitment to its customers relies on the high skills and reactivity of its 100 members of personnel, including over 50 engineers and 30 senior technicians, ready to be mobilized for projects all around the world.
Main Product Lines
- Underwater and surface robotics
- Radio frequency communications
- Underwater passive acoustics
- Underwater vehicles for divers
- Deep-water syntactic foam buoyancy materials
Main Services
- Life-extension services for orphan and/or old naval systems
- Marine survey services using subsea gliders and unmanned surface drones
- Localization of aircraft or submarine black boxes in the event of an accident at sea
- Training and instruction
ALSEAMAR on ALCEN's website
Defense & Security Naval & Submarine
Defense & Security Engineering, Maintenance & Services
Energy Oil & Gas
Aeronautics & Space Engineering & Maintenance
- read more
Bringing together the expertise and means of four ALCEN subsidiaries, ALSYMEX offers its clients solutions and services with high added value:
- Feasibility studies
- Engineering: machining, welding, vacuum
- Detailed design: mechanical engineering, thermo-mechanics, seismicity, vacuum, optics
- Production of high-precision mechanical and optomechanical assemblies: boilerwork, joint welding, machining
- Incorporation of complex systems in ISO 5 to ISO 8 class clean environments
- Non-destructive testing
- On-site installation
- Maintenance of mechanical, optomechanical, vacuum and high voltage systems for large scientific instruments and nuclear-capable sites
- Large programme management
ALSYMEX operates in the fields of defence, energy, aeronautics and large research infrastructures.
Parc Saint-Exupéry
10 rue de Bacaris – BP 30059
33703 Mérignac cedex
France- Website
- Contact
- Location on map
- +33 (0)5 56 13 84 44
ALSYMEX on ALCEN's website
Defense & Security Engineering, Maintenance & Services
Energy Engineering, Maintenance & Services
Energy Nuclear
Aeronautics & Space Mechanical components
Aeronautics & Space Engineering & Maintenance
- read more
For 30 years, LERITY (formerly LHERITIER) has been designing and manufacturing complex cameras and vision systems, capturing images in the visible spectrum. Through an ambitious policy of research and development, notably in the field of sensors and algorithms for real-time image improvement, LERITY has reached a level of excellence in the quality of image restitution, and is today a recognized expert in low light levels.
LERITY is both an OEM for recognized international actors in optronics and vision systems and a company at the forefront of innovation, notably in active imaging via its CAT EYE camera. LERITY can adapt itself to the specific needs of its customers: whether they be industrial companies, security forces or military forces.
Its reputation has notably been established in 3 markets, both in France and internationally:
- Defense & Security: day channel for vehicle-mounted optronic system, perimeter vision, cameras for submarine periscope, day/night coastal surveillance, shooting range metrology, day/night vision camera with CAT EYE active imaging
- Aeronautics: head-up display camera (HUD), taxiway camera, cargo-monitoring camera, cockpit camera (CIRS)…
- Railway: on-board retrovision systems (SNCF), guidance for tramways and buses, camera assistance in automatic driving
Campus Saint Christophe
10 av. de l'Entreprise – Pôle Magelan 2
95862 Cergy Pontoise
France- Website
- Contact
- Location on map
- +33 (0)1 34 24 38 20
LERITY on ALCEN's website
Defense & Security Vision, Inspection & Localization
Defense & Security Engineering, Maintenance & Services
Energy Nuclear
Aeronautics & Space Vision & Inspection
Lifetime extension
ALSEAMAR has a wide range of services for modernising naval systems to increase service life, improve performance and anticipate technological changes.
The ALSEAMAR teams have recognised obsolescence management skills and use modernisation and reverse-engineering methodologies, in particular for "orphan" systems.
ALSEAMAR's skills on board a ship or a submarine cover alarm systems, radar, sonar, radiocommunication systems, the instrumentation and control system, and all types of subsea vehicles.
For each case, ALSEAMAR is able to offer a turnkey solution to extend the service life of this equipment while incorporating new features.

Maintenance in naval operational conditions
ALSEAMAR provides maintenance and repair services including, in particular, the execution of configuration states and equipment inventories, drafting of maintenance plans and change orders, the design basis of spares sets and their supply, design of special tools and operation of work sites.
ALSEAMAR works on its clients' sites, in France and overseas, with multidisciplinary teams. It can also turn to local subcontractors depending on the types of operations (mechanical, electromechanical, electronic, surface treatment, hydraulics, etc.).
A leading operator for the French and foreign navies for Maintenance in Operational Conditions contracts, with high demands in terms of availability, ALSEAMAR offers a wide range of services: Zero state, preventive and corrective maintenance, hotline, design basis and spares management, CMMS, etc.

Mechanical design and production
ALSYMEX offers key customers solutions that combine machining, assembly — in particular by welding — of large, high-precision mechanical components and subassemblies.
ALSYMEX brings together the industrial resources and expertise of SEIV, ALSYOM and SIRATECH, located in the South-West of France.
Some key ALSYMEX projects:
- Manufacturing of the New Generation Dagaie System decoy launcher
- Manufacturing of the armour of armoured infantry combat vehicles
- Design, manufacturing and qualification of the new SYLENA MK2 decoy launcher systems

Simulation system operational maintenance
Thanks to its experience producing critical components for various machines, and its ability to deploy multidisciplinary teams on site, ALSYMEX is heavily involved in the maintenance in operational conditions of the French nuclear simulation programme.
Thus, after having maintained the Laser Integration Line of the Megajoule Laser facility (LMJ) in operational conditions, ALSYMEX is responsible for preventive and corrective maintenance of the experiment hall equipment and amplification sections of the LMJ, as well as that of the AIRIX flash radiography machine. Combining its expertise with that of other companies in the ALCEN Group, like CHAMPALLE, IRELEC and ITHPP, ALSYMEX works on all of the constituent subassemblies of these complex machines:
- Mechanical, optomechanical and vacuum systems
- Instrumentation
- High Voltage and electrotechnical systems
- Control command and electronic systems

Mechanical design and production
ATMOSTAT offers an integration service for various materials, including exotic materials, during design of complex systems. Long, solid experience acquired in major projects in the space, aeronautical and fusion sectors means that it can guarantee full management of property, personal and environmental protection engineering.
ATMOSTAT experts intervene in the early stages of a project, from the architecture of the client solution (particularly in the infrastructure and product interface definition and operational checking phases in the user environment) to systems and equipment support engineering, throughout the solution's life cycle.








Predictive ageing studies
ATMOSTAT conducts studies for evaluating, in the absence of feedback, the ageing capabilities of equipment, parts and systems according to a predictive ageing study originally developed by the company for its own needs.
The APASE® method identifies the ageing modes, puts them in order of importance, weighs up the impact of these modes, offers ways to reduce impact, establishes a global ageing model and helps to produce the maintenance strategy.

Industrial process automation and robotisation
From pilot engineering to start-up, CHAMPALLE offers a comprehensive automation and robotisation service for existing equipment, machines, process lines, etc. during design or development.

Instrumentation and control system design and production
CHAMPALLE designs and manufactures automation, control and management systems (control consoles, MMIs).
CHAMPALLE manages, in particular, high availability safe automation up to SIL3.
The main expertise that sets CHAMPALLE apart involves managing High Availability safe automation using redundant safety PLCs up to SIL3.

Vision system operational maintenance
LHERITIER operates in the optical and electronic fields for maintenance or modernisation of cameras or vision systems.
It uses its very high level of expertise and the extensive resources it has to ensure the appraisal, repair, obsolescence management and retro-engineering of old systems (typically transformation of analogue visible channels into Full HD digital format).
Depending on the obsolescence and using an "FFF" (Fit Form Function) approach to the latest technological standard, as well as out of concern for economy throughout the equipment's life cycle, LHERITIER offers either retrofitting or modernisation of equipment.
LHERITIER has undertaken the modernisation of visible channels of combat systems, from analogue cameras to the digital standard and modernisation of submarine periscopes.
