Next Generation Radionuclide Identification Device

identiFINDER® R425

Model: identiFINDER® R425 G
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The identiFINDER® R425 is the next generation of the most deployed radionuclide identification device (RID), offering 360-degree coverage so you can locate and measure gamma and neutron radioactive sources with confidence. It builds on FLIR’s trusted algorithms with advanced heuristics and hybrid identification techniques. 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 identiFINDER R425 provides pinpoint accuracy and remains fully operational. The identiFINDER R425 goes the distance with balanced ergonomic design, unparalleled ruggedness, flexible power management, and usability. The R425 provides an ideal balance of size, weight, and performance for various missions including surveying, emergency response, and environmental monitoring.

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Building on a legacy of tried and trusted performance

  • Better Detection In All Directions

    New cubic detector design, sourceless stabilization, advanced heuristics, and hybrid identification techniques enable high performance detection in all directions; 3x more sensitive gamma and 2x more sensitive neutron detection

  • Power Through Your Mission

    IP67-rated, ergonomic design is 15% lighter than previous generations, while the exceptional 12-hour battery life provides the right balance for a variety of missions

  • Situational Awareness And Support When You Need It

    Remote data viewing, operation, and reach back is made possible through communication features including dual USB-C ports, Teledyne FLIR's trusted web interface, the Teledyne FLIR RAD Mobile Application, and a universal API that enables integration with user deployed networks

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Input Voltage
100-240 AC (wall adapter and USB-C cable supplied)
System Overview
Battery Specification
Internal Li-ion cells; additional user-selectable external battery (1 each 16650 Li-ion or 2 each CR123); hot-swappable
Enclosure & Protection
Injection molded housing with overmold;
rating IP67 according to IEC 60529;
MIL-STD 810g Salt / Fog compliant
Gamma Detector – Nal [TI]
1.77 x 1.77 x 1.77 in Cube (45 x 45 x 45 mm) with Silicon Photomultiplier (SiPM)
Neutron Detector_ZnS [optional]
Radionuclide identification device (RID)
Detects neutron and gamma radiation emitted from natural occurrences in the environment, special nuclear material, industrial, or medical material
Operating Temp & Humidity
-4 to 122 °F (-20 to 50 °C) 10 to 93%, non-condensing
Storage Temperature
14 to 95 °F (-10 to 35 °C)
Physical Features
Dimensions (L x W x H)
9.3 x 3.9 x 3.7 in (235 x 100 x 95 mm)
≤2.6 lbs (≤1.2 kg)
Cold Start Time
<20 seconds from cold start
Sampling & Analysis
Library Categories
Nuclide Identification
According to ANSI N42.34
Sample Introduction
Absorption of EM gamma and neutron emissions
Time to Identification
From a few seconds to a few minutes
System Interface
USB-C (2x), Bluetooth (BLE 5.0)
Data File Format
According to ANSI N42.42
Data Storage
8 GB internal memory
Display & Alerts
2.7" diagonal (400 x 240 pixels) screen; sunlight readable; visible through polarized glasses
Onboard webserver software
Training Requirements
<10 mins for operator; 1 hour for advanced user
Dose Rate Range [Cs_137]
10 µrem/h – 1 rem/h ± 10%, 100 nSv/h – 10 mSv/h ± 10%
ID Mode 0.1 µrem/h – 5 mrem/h, 1 nSv/h – 50 µSv/h
Energy Range [Gamma]
25 keV - 3 MeV
Gamma Sensitivity [Cs–137]
1610 cps/µSv/h
Gamma Spectrum Length
1024 channels
Real time linearization of gamma energy
Overload Dose Rate Range
>1 rem/h, >10 mSv/h
Service Interval
5-year factory maintenance
Sourceless Gain Stabilization
Typical Resolution
≤ 7% FWHM at 662 keV (20°C)
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identiFINDER® R425 - Model: identiFINDER® R425 G

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