D3MTM
The ultra-low
false alarm rate
personal radiation
detector

A high-performance combined gamma-neutron,
Personal Radiation Detector that protects against the(accidental) exposure to nuclear materials.
Field proven design, the handheld D3M is easy tonavigate and simple to understand and provides
confirmation of exposure to threats.

The D3M is a combined gamma-neutron Personal Radiation Detector (PRD)with superior sensitivity. It continuously scans and monitors the environment
for radiological threats and alerts the user when it detects a gamma and/orneutron radioactive source.
This rapid-response handheld PRD display screen shows:n gamma alarmn dose rate
n neutron countn accumulated dosen neutron alarmn dose alarm

Better Detection

D3M combined gamma-neutron PersonalRadiation Detector (PRD) with superiorsensitivity

The D3M is a powerful combination of two of Kromek’s award-winningleading technologies; the non-3He compact thermal neutron detector and its
world leading gamma detector.
Its superior detection capability is due to its large detector volume – I inch3Csl(TI) gamma detector. The D3M offers superior sensitivity at 500 cps/(µSv/h)for Cs-137 and has a maximum dose rate of 1 Sv/h @ 662keV.
The large detector volume together with the higher sensitivity means that it isbetter able to detect threats faster than standard PRDs and with minimal falsealarms.

Ultra-Low False Alarm Rate
The D3M also comes with an industry-leading ultra-low false alarm rate; morethan six times better than the ANSI standard which means less time wasted
with nuisance false alarms that can occur with some basic PRDs. It alsomeans the operator is more able to trust the information the device is giving
them because when you get an alert it is more likely to be the real thing.
When there is an alarm, the D3M alerts the user via a combination of audible,
visible and vibration alarms.

Detect Shielded Threats
Discrete, lightweight and wearable
the D3M continually scans for threats
while you get on with the job in hand

The powerful neutron detector improves the detection of shielded fissile orspecial nuclear materials (SNM).

Dose Data Analysis

Applications
D3M – the go-to detectionsolution for nuclear industry
professionalsn Law Enforcementn Fire Departments
n Customs and Border Patroln Military and civil defencen Public security and event
monitoringn Nuclear industry

The D3M can be connected to a computer via USB or Bluetooth for data
extraction using Kromek’s CIRIS software. An SD card within the D3M
detector can store over 100,000 spectral data files. The data can also be
used for dose reconstruction, showing dose over time and accumulateddose.

Field Proven Technology
The D3M developed from DARPA’s (Defense Advanced Research Projects
Agency) SIGMA Program as an extension of the D3S radiation detection device
which has over 10,000 detectors currently deployed globally.

Networkable
The D3M is also compatible with DARPA’s SIGMA Network when paired witha specialised app on an Android phone. Using SIGMA’s web-based userinterface, multiple units can be easily tracked displaying any threats in real-timein multiple locations on a map of a specific area from a remote and centralised
location by trained experts in radionuclide identification.

Accessories
Ruggedized event cases provide more than just storage and protection for theD3M and charger units, they also enables rapid deployment.
Charging stations simplify the electrical power logistics of charging a fleet ofdevices from a control point.

Automated detection and ID with webbased command and control system

Standalone charger stations are available
for operating from a central control point

Ruggedized go anywhere event casethat enables rapid deployment

Americium-241*

Fluorine-18**

Neptunium-237

Strontium-90***

Antimony-124

Gallium-67*

Palladium-109

Technetium-99m*

Barium-133*

Gold-198

Plutonium-239*

Thallium-201*

Bromine-82

Indium-111

Plutonium, reactor gradein various shielding*Thorium-232*

Caesium-134

Iodine-123

Plutonium, weapons gradein various shielding*Tin-113

Caesium-137
in various shielding*

Iodine-131*

Potassium-40*

Uranium-235*

Californium-252****

Iridium-192
in various shielding*Radium-226*

Uranium-238*

Chromium-51

Lutetium-177

Scandium-46

Uranium, depleted invarious shielding*

Cobalt-57*

Lutetium-177m

Selenium-75

Uranium, highly enrichedin various shielding*

Cobalt-60
in various shielding*Manganese-54

Sodium-22

Yttrium-88

Europium-152

Molybdenum-99

Notes:*Mandatory
radionuclides as
defined in ANSI N42.34**Beta+ emitting
radionuclide***Beta- emitting
radionuclide****Neutron emitting
radionuclideDetector typeGamma and Neutron detection

Gamma detector materialCsI(Tl)Gamma detector volume

1 in3 (16 cm3)

Gamma energy range

30 keV to 3 MeV

Gamma sensitivity for Cs137

5 cps/μR/h (500 cps/μSv/h)Photo peak 1.2 cps/μR/h (120 cps/μSv/h)Maximum throughput for gamma channel

30,000 cps

Dose rate

2.0 mR/h (20 μSv/h) at 662 keV (spectroscopic)
100 R/h (1 Sv/h) at 662 keV with high dose moduleHigh dose sensor

Yes, PhotodiodeNeutron detector material

Non-3He

Neutron detector

9 cps in a 1 neutron per cm2 field

Neutron detector gamma rejection

Better than 10-7, meets ANSI N42.34 section 6.7

Maximum throughput for neutron channel

10,000 cps

False alarm rate

1 in 24 hours

Communications

Micro USB, Bluetooth®

Operational battery life

24 hours, increased to 36 hours with replaceable battery
pack option

Operational temperature range−20°C to 50°C, meets ANSI N42.32 section 7.1, 7.2, 7.5

Device size (excluding phone)4.8” x 3.1” x 0.9” (122mm x 80mm x 23mm)

Device volume (excluding phone)

224 cm3

Humidity

Up to 93% RH ANSI N42.32 section 7.3

Moisture/dust protection

IP65 as per ANSI N42.32 section 7.4

Weight0.57 lbs (261 g)

Battery

1450mAh Lithium polymer

Screen Information

Monochrome 128x64 OLED Display

Charging

Charging via USB or inductive charging

Device status indicator

External LED

Geospatial positioning

GPS provided by smartphone when installed with suitableapp, such as the SIGMA LE app.

Alarm sounderYes, ANSI N42.32 section

Alarm vibration

Yes, ANSI N42.32 section© 2018 Kromek Group. All rights reserved.

Kromek Group plc
UK NETPark Thomas Wright Way Sedgefield County Durham TS21 3FD T: +44 (0) 1740 626060
USA 143 Zehner School Road Zelienople PA 16063 T: +1 724 352 5288
E: sales@kromek.com W: www.kromek.com

D3M USL SPF-DOC-1259 Rev4

Detector specification