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Kromek Group PLC (KMK)

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Thursday 03 December, 2020

Kromek Group PLC

Kromek launches the D5 RIID radiation detector

RNS Number : 3535H
Kromek Group PLC
03 December 2020

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3 December 2020


Kromek Group plc

("Kromek" or the "Group")


Kromek launches the D5 RIID high performance radiation detector

World's smallest RIID with high accuracy and ultra-low false alarm rate


Kromek (AIM: KMK), a worldwide supplier of detection technology focusing on the medical, security screening and nuclear markets, announces the launch of the D5 RIID, the world's smallest high performance radioisotope identification device ("RIID"). The ruggedised device, with ultra-low false alarm rate, is designed for military, homeland security and industrial use.


The D5 RIID was developed under a programme with the Defense Threat Reduction Agency of the US Department of Defense. It detects a wide range of sources, including special nuclear material and mixed, shielded and heavily masked configurations. It provides high accuracy dose measurement and has an industry-leading ultra-low false alarm rate of less than 1 in 24 hours. The D5 RIID combines this advanced performance with being small, lightweight and easy-to-use - capable of being operated in one hand. It can also be used when wearing all levels of PPE, including gloves. It offers multiple modes of configuration, including being able to provide app-based training, and can be easily integrated into standard and custom networks.


It is the first device to be launched in Kromek's new D5 product range, which expands the Group's radiation detection portfolio to encompass devices specifically designed for more challenging use cases and harsh environments. This next-generation of product has a larger crystal, which enables higher accuracy and sensitivity - capable of detecting mixed, shielded and heavily masked configurations including special nuclear material - as well as being ruggedised.  


Dr Arnab Basu, CEO of Kromek, said: "We are delighted to have launched the D5 RIID, which truly sets a new benchmark in radioisotope identification. The level of accuracy, combined with small size, far exceeds competing military standard detectors, enabling the rapid identification of radiological threats. As the first of our new D5 range, this device expands our portfolio to provide products ideal for use in harsh environments and for more challenging applications alongside our existing D3 solutions that are aimed at fleet deployment for large-scale networking across urban areas. We are proud to be continuing to drive innovation in this crucial area to enable rapid, informed decisions to be made in response to a radiation threat wherever it may appear." 


For further information on the D5 RIID, please visit:


D5 RIID Detector Specification

Detector type

CLLBC - Gamma and Neutron detection

Detector size

1.5" diameter x 1.5" long

Gamma energy range

30 keV to 3 MeV

Gamma dose rate range

0.01 µSv/h (10 µR/h) to 100 µSv/h (10 mR/h) spectroscopic

100 µSv/h (10 mR/h) to 1 Sv/h (100 R/h) high dose sensor

Dose accuracy

± 10% for Cs137

Gamma resolution

Typically 3.5% @ 662 keV

Area efficiency*

1.62 relative to a 2" x 2" Ø Nal

Neutron sensitivity

= 16cm2

Neutron detector gamma rejection

Better than 10-7 meets ANSI N42.34 (2015) section 6.7

Operational temperature range

-20°C to 50°C


Up to 93% RH




Primary cells: 2 x AA field replaceable

Internal rechargeable: Li-Ion >2.25 Ah

Battery capacity (primary cells)

24 hours at normal background

Battery charging

1 hour to 50% capacity, 4 hours to full charge

Wired interface


Wireless interface


Wi-Fi 802.11a/b/c/g/n

Firmware updating

Update over USB


2.8" colour  antiglare with backlight suitable for both high and low light


Three colour

Alarm notifications

Visual, audio and vibration

Device size

173.1mm x 79mm x 41.1mm

Device weight

660 g (1.47 lb)

File storage

ANSI N42.42

Confirmation mode

30 sec to 5 minutes

False alarm rate

Better than ANSI N42.34 (2015)

Isotope ID

ANSI N42.34 (2015)

Hardware compliance

ANSI N42.34 (2015)

Rugged military standard compliance

MIL-STD-810Gm w/Charge 1

Calibration stabilisation

Sourceless natural atmospheric


* Area efficiency =662 keV /R662keV1.5 


For further information, please contact:


Kromek Group plc


Arnab Basu, CEO

Paul Farquhar, CFO


+44 (0)1740 626 060

Luther Pendragon (PR)


Harry Chathli

Claire Norbury

Alexis Gore

Joe Quinlan

+44 (0)20 7618 9100


About Kromek Group plc


Kromek Group plc is a technology group (global HQ in County Durham) and a leading developer of high performance radiation detection products based on cadmium zinc telluride ("CZT") and other advanced technologies. Using its core technology platforms, Kromek designs, develops and produces x-ray and gamma ray imaging and radiation detection products for the medical, security screening and nuclear markets.


The Group's products provide high resolution information on material composition and structure and are used in multiple applications, ranging from the identification of cancerous tissues to hazardous materials, such as explosives, and the analysis of radioactive materials.


The Group's business model provides a vertically integrated technology offering to customers, from radiation detector materials to finished products or detectors, including software, electronics and application specific integrated circuits ("ASICs").


The Group has operations in the UK and US (California and Pennsylvania), and is selling internationally through a combination of distributors and direct OEM sales.


Currently, the Group has over one hundred full-time employees across its global operations. Further information on Kromek Group is available at and



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