D3S wearable personal radiation detectors

Protect your team and your citizens from radiological threats and secure your borders from nuclear smuggling.

D3S wearable personal radiation detector

The D3S is ready for your mission, whatever your mission.

The D3S range of personal radiation detectors replaces PRD personal radiation detectors, SPRD spectroscopic personal radiation detectors and RIID radioisotope identification device with ONE device that fulfils all these functions.

The D3S PRD can function as a search only dose measurement PRD but at the press of a button in the app it can also show isotope identification and with an over the air app upgrade transforms into a fully featured RIID with reachback and emailable report files including pictures. This makes the D3S range one of the most flexible and cost-effective radiation detection solutions available today.

Choose the model you need now and upgrade later.

Easily switch from PRD to full ID RIID mode with an easy to activate software upgrade.

D3S part of a total radiological protection solution

Networked radiological threat protection

Harness the power of the SIGMA Network and Kromek to protect a city, border or critical infrastructure.
Using the SIGMA Network, multiple detectors of different types can be networked together to provide a complete radiological map and alert system across a large area, including D3S NET concealable wearable detectors that can go anywhere a terrorist can lurk.

D3S technical specifications

These specifications are common across all D3S models

Gamma detector material: CsI(Tl).

  • 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: 10,000 cps.
  • Maximum 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 module.

Neutron detector material: Non-3He.

  • Neutron detector gamma rejection: Better than 10-7 meets ANSI N42.34 section 6.7
  • Maximum throughput for neutron channel@ 5,000 cps

Search mode isotope ID within 3 seconds. Three-second rolling average to detect and identify sources of radiation.

Confirmation mode complies with ANSI 42.34 within 30 seconds.

Superior false alarm rejection meeting ANSI N42.32 for the gamma and neutron channels independently.

D3S classifies and categorises industrial, medical, NORM and SNM isotopes.

Library far exceeds ANSI and international standards.

42 isotopes – 22 more than ANSI N42.34 standard.

Discriminates between Medical, NORM, Industrial and SNM classes.

69 unique signatures which account for shielding and mixed configurations.

See the full isotope list here.

The D3S is available in English and Japanese: text and speech

See the Japanese translation in action here.

Why is neutron detection important in a security detector

A radioactive substance used in a terrorist attack is likely to be shielded to prevent its detection by gamma radiation detectors; it is vital that any detectors carried can detect neutrons as well as identify the radioactive isotopes found.

Gamma radiation can be blocked by several centimetres of lead, concrete or steel.

Neutrons need several feet of water to block them if someone is intent on doing harm they will probably shield the gamma radiation source to escape detection but the D3S will still spot them.

There are a lot of radioactive isotopes out in the world. You need to know what you are facing.

No one wants to cause a full-scale alert over a truck of bananas or an old lady that has just come from the hospital.

Radioactive substances are used in medical devices and treatment, industrial tools used in the workplace and in products you have in the home. Some locations are also more naturally radioactive than others.

The D3S classifies the radioisotopes it finds into:

  • Medical: isotopes used in medical treatment or medical machines.
  • NORM (Naturally Occurring Radioactive Material) is material which occurs naturally or created by activity such as burning coal, making and using fertilisers, oil and gas production or mining.
  • Industrial: isotopes used in equipment or testing or some other industrial process. A common example is devices that use a radioactive isotope to test moisture levels or depth levels in building material.
  • SNM classes (Special Nuclear Material): material that has direct use in a clandestine fissile explosive or for its use in the production of nuclear material for use in a fissile explosive.

Armed with this knowledge the first responder can act appropriately. In each, every case speed and accuracy of detection is important as is the ability to reach back to get more specialist help if needed.

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