All-Purpose Radionuclide Identification Device
identiFINDER R400

With over 20,000 devices deployed globally, the FLIR identiFINDER R400 is the most widely deployed handheld radionuclide identification device (RID) in the world. It is used to detect, locate, measure, and identify radioactive sources and produces rapid visible, audible, and tactile alerts that expedite response measures. The identiFINDER R400 provides operators the ideal balance of size and weight for a wide variety of monitoring scenarios including all-purpose surveying, emergency response, and environmental monitoring.

Detect, Locate, Measure, and Identify Radioactive Sources


NaI detector enables rapid isotope identification (ANSI N42.34 library) for threat determination; GM detector provides dose rate and total dose


Large display provides visual alarm confirmation and ability to view advanced spectral data; self-explanatory buttons provide easy, one-handed operation


Like other identiFINDER products, the R400 contains on-board Bluetooth, web server, and GPS technologies

Data Storage 2GB internal memory; up to 600,000 spectra
Training Requirements < 10 mins for operator; 1 day for advanced user
Full specifications
Operating Humidity 10 to 80%;
Operating Temperature -4 to 122 °F(-20 to 50 °C)
Storage Temperature 14 to 95 °F(-10 to 35 °C)
Global Positionsing System [GPS] [removable] 12-channel SiRF III receiver
Dimensions (L x W x H) ≤3.7 x 10.6 x 3.2 in (9.4 x 26.9 x 8.1 cm) -with battery
Weight ≤3.2 lbs(≤1.5 kg)
Battery Specs Either rechargeable NiMH or 4x AA pack(supplied); ≥8h operational battery life; recharge ≤4h when using AC; recharge >4h when using USB
Cold Start Time < 2 mins from cold start
Input Voltage 100-240 VAC (wall and car adapters and USB cable supplied)
Nuclide Identification According to ANSI N42.34
Sample Introduction Absorption of EM gamma or neutron emissions
Sampling & Analysis From a few seconds to minutes
Threats Detects neutron or gamma radiation emitted from natural occurrences in the environment, special nuclear material, industrial, or medical material
Software On-board webserver software
Dose Range 0 nSv - 1 Sv (0 nrem - 100 rem)
Dose Rate & Accuracy (Cs-137) 0 nSv/h - 10.00mSv/h (0 nrem/h - 1.0 rem/h); ±30 %
Energy Range [Gamma] 20 keV - 3 MeV
Gamma [High Dose Rate] Geiger-Mller
Gamma LaBr3 1.2 x 1.2 in (30 x 30 mm)
Gamma Spectrum 1024 channels; 3 MeV
Geiger-Muller Dose Rate Range 100 µSv/h - 10mSv/h (10mrem/h - 1.0 rem/h)
Overload Dose Rate Range 10 mSv/h - 1 Sv/h (1.0 rem/h - 100 rem/h)
Scintillator Dose Rate Range 0 nSv/h - 500 µSv/h (0 nrem/h - 50mrem/h)
Service Interval 5 year factorymaintenance
Stabilization LED
Typical Resolution 4.5 % FWHM at 662 keV
Exports restrictions

The information contained in this page pertains to a dual use product controlled for export by the Export Administration Regulations (EAR). Diversion contrary to US law is prohibited. US Department of Commerce authorization is not required prior to export or transfer to foreign persons or parties unless otherwise prohibited.