The FLIR identiFINDER R425 radionuclide identification device

The FLIR identiFINDER R425 is the next generation of the most deployed radionuclide identification device (RID). The device offers 360-degree coverage so you can locate and measure gamma and neutron radioactive sources with confidence. With over 25,000 deployed RIDs, the R425 builds on a solid legacy of performance and FLIR's trusted algorithms with advanced heuristics and hybrid identification techniques.

identiFINDER user interface

With the familiar identiFINDER user interface and 3-button control, you can operate the R425 quickly, communicate results, and take command of any situation, in any environment, remotely. When other systems fail in extremely high gamma fields, the FLIR identiFINDER R425 provides pinpoint accuracy and remains fully operational.

Enhanced detection design

The identiFINDER R425's new cubic detector design allows for high performance in all directions, allowing for:

  • 3x more sensitive gamma detection (G)
  • 2x more sensitive neutron detection (GN)
  • Advanced heuristics and hybrid identification techniques
  • Sourceless stabilisation

Power through your mission

Unparalleled ruggedness, flexible power management, and usability to go the distance.

  • Internal battery lasts up to 12 hrs; additional power options include disposable or rechargeable batteries that are hot swappable and user-replaceable
  • Ready in ≤20 seconds from cold start
  • Fully enclosed solid-state detector
  • IP67-rated
  • Balanced, ergonomic design
  • Sunlight readable screen; visible through polarized glasses

Situational awareness and support

R425 makes it easier than ever to quickly communicate results, no matter the method.

  • Established FLIR GUI and 3-button control
  • Remote data viewing, operation, and reach back
  • Dual USB-C ports and FLIR’s trusted web interface
  • FLIR RAD Mobile App
  • Universal API enables integration with user deployed networks (Mobile Field Kit, ATAC, Sigma Edge, Safe Environment Gateway, etc.)
  • Built-in Bluetooth and GPS

FLIR identiFINDER R425 specifications 

Technology Radionuclide identification device (RID); Gamma and Gamma/Neutron Models
Gamma Detector - Nal (TI) (G & NG Models) 45 x 45 x 45 mm cubic detector with silicon photomultiplier (SiPM)
Gamma Detector - LaBr3 (Ce) (LG & LNG Models) 35 x 35 x 35 mm cubic detector with silicon photomultiplier (SiPM)
High Dose Rate Gamma Detector Energy Compensated Geiger Müller (GM) Tube
Neutron Detector - ZnS
(GN & LGN models only)		 27 x 58 x 5 mm moderated panels (2 each)
Energy Range (Gamma) 20 keV - 3 MeV
Gamma Sensitivity (Cs-137) 1610 cps/μSv/h (G & GN models)
1000 cps/μSv/h (LG & LGN models)
Neutron Sensitivity ≥ 7.8 cps/nv (GN & LGN models only)
Gamma Spectrum Length 1024 channels
Dose Rate Range (Cs-137) 10 μrem/h – 1 rem/h ± 10%,
100 nSv/h – 10 mSv/h ± 10%
Dose Rate Range ID Mode (Cs-137) 0.1 μrem/h – 5 mrem/h
1 nSv/h – 50 μSv/h
High Dose Rate Range 1 - 100 rem/h ± 30%
10 mSv/h - 1 Sv/h ± 30%
Stabilisation Sourceless gain stabilisation
Linearisation Real time linearisation of gamma energy
Typical Resolution ≤ 7% FWHM at 662 keV (20°C) (G & GN models)
≤ 3.5% FWHM at 662 keV (20°C) (L & LN models)
Service Interval 5-year factory maintenance

Sampling & Analysis
Sample Introduction Absorption of EM gamma and neutron emissions
Threats Detects neutron and gamma radiation emitted from natural occurrences in the environment, special nuclear material, industrial, or medical material
Nuclide Identification According to ANSI N42.34
Library Categories SNM, IND, MED, NORM
Time to Identification From a few seconds to a few minutes

System Interface
Display & Alerts 2.7” diagonal (400x240 pixels) screen; sunlight readable; visible through polarized glasses
Communications USB-C (2x), Bluetooth (BLE 5.0)
Data Storage 8GB internal memory
Training Requirements <10 mins for operator; 1 hour for advanced user
Software Onboard webserver software
Data File Format According to ANSI N42.42

Power
Input Voltage 100-240 AC (wall adapter and USB-C cable supplied)
Battery Specification Internal Li-ion cells; additional user-selectable external battery (1 each 16650 Li-ion or 2 each CR123) ;hot-swappable
Cold Start Time ≤20 seconds from cold start

Environmental
Operating Temp -30 to 60 °C (-22 to 140 °F)
Operating Humidity 10 to 93%, non-condensing
Storage Temperature  0 to 60 °C (0 to 140 °F)

Physical Features
Dimensions (L x W x H) 235 x 100 x 95 mm (9.3 x 3.9 x 3.7 in)
Weight ≤1.2 kg (≤2.6 lbs)
Enclosure & Protection Injection moulded housing with overmould; rating IP67 according to IEC 60529;
MIL-STD 810g Salt / Fog compliant9

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