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D3S® Unparalleled highest sensitivity for both gamma and neutron detection for a device in this size/clas.. Product #: D3S


Unparalleled highest sensitivity for both gamma and neutron detection for a device in this size/class

Handheld D3S detector

Kromek has combined two of its leading technologies: the non-He3 compact thermal neutron scintillator detector and CsI(Tl)/silicon photo-multiplier-based gamma detector, into the ground-breaking all-new second generation ‘Discreet Dual Detector®’, D3S®, a hybrid gamma/neutron platform that uniquely combines low-cost with high sensitivity and small form factor together with a long-life battery power source making it the ideal portable instrument.

Unique low-cost device unmatched in the market

The D3S is currently available in two versions: D3S-NET – a blind detector forming part of a covert integrated monitoring network; the other, D3S-ID - a standalone next generation isotope ID.

D3S-NET  -  Integrated detector network that guards against the threat of nuclear terrorism and ‘dirty bombs’

D3S-ID - Standalone detector for real-time infield isotope ID

Multiple detectors Single detector
Multiple locations Single location
Paired with smartphone Paired with Smartphone
Fixed and mobile sensors Bluetooth or tethered connection
Continuously mapping radiation levels Fastest and most accurate isotope ID
Cloud augmented WAN continuously assesses data against threats Easy upgrade path to fully networked solution


Handheld D3S detector tethered with Smartphone

  • Discreet wearable design - lightweight and small
  • Uninterrupted operation - at least 12 hours on single battery charge
  • Data connectivity: Bluetooth® to mobile phone or other devices with USB option
  • Spectroscopic capability enables threats and non-threats to be differentiated through appropriate algorithms
  • No user training required - single button operation with LED indicator



“Dirty bomb threat is now a reality”

Handheld D3S detector

Today, nine nations have the capability to make a nuclear weapon and the components for a nuclear weapon, or a much simpler radiological dirty bomb, can be found anywhere around the world. One terrorist detonation could be catastrophic and could escalate the threat of nuclear war.

So, if a weapon, or the materials needed to make one, is being transported to a particular target, how do we make sure we find it in time?

How can you monitor a city, an airport, sea port or rail depot for the presence of radioactive materials over an area that can cover many square kilometres?

How it works

This ground-breaking technology enables the creation of agile, cloud augmented wide area radiation detection networks combining fixed and portable sensors, that will continuously monitor radiation in urban and other environments, and that can learn and adapt in real-time to provide significant defensive capability against the threat of nuclear terrorism and so-called ‘dirty bombs’.

Handheld D3S detector data generated into 2-dimensional heatmap

Kromek uniquely delivers the cost and performance needed for implementation of fixed, mobile and drone networks. A continuous, always-on and affordable wide area monitoring capability.

Multiple detectors can be fixed or carried by people or vehicles. Data is collected and sent to central point for analysis. With this information continuously coming in, a 2-dimensional heat map can be built up showing areas of interest.

The system is continuously assessing the data against threats. Where detectors converge in an area, the system aggregates that detector data intelligently and then compares it against a threat template. If threats are found, it can then elevate and alert for action at a higher level.

In-building tracking

2-dimensional ground level and single-storey building data can be augmented by upgrading software options to include in-building tracking enabling data to be mapped over multiple floors.

Standalone next generation Isotope Identification

Handheld D3S detector

Low cost, high sensitivity and low signal to noise operational capability for fastest and most accurate isotope identification by a medium resolution detector system within a small form factor.

  • Combines high sensitivity and cost savings of the D3S
  • Leverage the power of cellular phone and Android technology
  • Leverage the leading algorithm isotope ID technology that has been extensively tested via US Agencies

 The D3S-ID algorithm

The award-winning algorithm provides a novel approach for radiological background estimation that improves the detection and discrimination capability of medium resolution detectors.

The algorithm provides significant enhancements in detection and identification of low activity shielded and masked threats and nuisance isotopes for a fast assessment of alarms. The algorithm has been extensively characterised both in DNDO and DARPA programs.

D3S ID04

D3S-ID App

  • Connects to D3S via Bluetooth or USB
  • Provides user interface to real-time ID alerts (3 sec rolling average spectrum with 1 Hz update)
  • Includes Wide Area Search and Confirmation Mode functions 

User Interface Provides:

  • Sensor operation
  • Status and notifications (visual and audio)
  • Count, Detection and ID history

D3S-NET integrated networked detector


D3S-NET - Safeguarding Cities

UKTo download the A4 English datasheet click here
USATo download the US Letter English datasheet click here




D3S-NET - Airport Security Blueprint

UKTo download the A4 English datasheet click here
USATo download the US Letter English datasheet click here
japanTo download the A4 Japanese datasheet click here




D3S-ID - Standalone Isotope ID

UKTo download the A4 English datasheet click here
USATo download the US Letter English datasheet click here

Contact Us

Kromek Group plc, NETPark, Thomas Wright Way,
Sedgefield, County Durham TS21 3FD United Kingdom

Tel: +44 (0) 1740 626060 Fax: +44 (0) 1740 626061

Registered in England and Wales number 8661469

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