High-Temperature Detectors for Next Generation Reactors

Proven reliability up to 800°C and beyond for SMR and AMR applications.

Built on the combined foundation of Photonis and Centronic innovation — 80+ years of neutron detection excellence.

High-Temperature Detectors for Next Generation Reactors

Reliability That Endures Extreme Conditions

Exosens delivers high-temperature fission chambers engineered for the world’s most advanced nuclear environments. Our detectors provide precise neutron flux measurements in both in-core and ex-core configurations—proven to operate at sustained temperatures 800°C+.
With decades of experience supporting nuclear instrumentation worldwide, Exosens ensures reliable, accurate detection under even the most demanding conditions.

Photonis and Centronic united under Exosens chambers

Photonis and Centronic united under Exosens

Built on 80+ Years of Detection Heritage

Exosens brings together the combined expertise of Photonis and Centronic, two trusted names in radiation detection. For more than eight decades, our technologies have powered critical measurement systems across commercial, research, and defense applications.
Today, we continue to build on that foundation of innovation—delivering the next generation of neutron detectors designed for performance, durability, and confidence in the field.

Supporting the Next Generation of Reactors

Designed to meet the evolving needs of advanced reactor programs, Exosens detectors support safe, efficient operations across a range of platforms:

Small Modular Reactors (SMRs): Compact, high-performance neutron flux detection.
Advanced Modular Reactors (AMRs): Proven reliability for extreme thermal environments.
Research Reactors: Precision instrumentation for experimental and prototype systems.

Wherever neutron monitoring is critical, Exosens provides the sensors you can trust.

Supporting the Next Generation of Reactors

Performance Proven up to 800°C+

Every Exosens fission chamber is rigorously tested for stability, sensitivity, and endurance under extreme temperatures. Our detectors maintain consistent response characteristics and reliability through long-term exposure—supporting safe operation and dependable reactor data.

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Safety You Can Rely On

Safety and performance go hand in hand. Exosens manufactures to the highest quality standards, ensuring consistent, traceable performance for every detector delivered. Our robust design processes and global quality systems provide the confidence operators need for continuous, safe operation in modern nuclear environments.