Ecotest CADMIUM - Model DKS-02PN PRD -Search Alarm Dosimeter

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High sensitivity device intended to detect and localize radioactive and nuclear materials by their external gamma and neutron radiation. It is widely used to prevent the illicit transfer of radioactive materials. Upon customer’s request, we can produce CADMIUM in only gamma version (without a neutron channel).

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ionizing radiation

gamma radiation

scintillation detector

nuclear material

radiation monitoring

ionizing radiation level

neutron detection

High sensitivity CsI(Tl) scintillation detectors of gamma and LiI(Eu) of neutron radiation with solid-state (silicon) photomultiplier
Color display with high resolution
No “microphone effect”
High thermal stability
Audio and vibration alarm of threshold levels exceeding
Threshold alarm system with four independent threshold levels:
- search threshold level or sigma-threshold (a threshold level of pulse count rate from the detector of photon-ionizing radiation)
- safety threshold level (a threshold level of DER photon-ionizing radiation)
- neutrons threshold level (a threshold level of count rate from the neutron detector)
- accumulated dose threshold level (a threshold level of photon-ionizing DE)
Light color alarm (indication) of threshold levels exceeding (gamma radiation – red color, neutron – blue) and visual alarm on the side of the device
Dosimeter communicates with a PC via USB port
Powered by built-in lithium polymer storage battery that can be charged via USB cable
Software is used for:
- reading measurement results and critical events from the dosimeter memory into the PC
- report preparation and printout
- display of the obtained dosimetric information with the GPS coordinates on the area map

Search (detect and localize) for radioactive and nuclear materials by their external gamma and neutron radiation
Measurement of ambient dose equivalent rate (DER) of gamma and X-ray radiation (photon-ionizing radiation)
Indication of ambient dose equivalent rate (DER) of neutron radiation
Measurement of ambient dose equivalent (DE) of gamma and X-ray radiation
Determination of gamma, X-ray and neutron radiation intensity

search alarm dosimeter
charger
shielded USB cable
“Spectra Reader” software (on a mini-CD or other electronic media)
operating manual
packing case

Photon-ionizing radiation sensitivity of (137Cs) CsI(Tl) scintillation detector: 200 cps/(µSv/h)
Upon customer’s request the sensitivity can be changed to a value of no less: 400 cps/(µSv/h)
Neutron radiation sensitivity while using the LiI(Eu) scintillation detector
- for thermal neutrons, no less: 1.2 ± 0.12 pulse·cm2/n
- for fast neutrons, no less: 0.12 ± 0.012 pulse·cm2/n
- Total measurement and display range of photon-ionizing DER: 0.01 … 1·106 μSv/h
- in scintillation detecting unit of photon: 0.01 … 50 μSv/h
- from built-in Geiger-Muller counter: 50 … 1·106 μSv/h
Measurement and display range of photon-ionizing DE from the Geiger-Muller counter: 0.1 … 9.9·106 μSv
Display range of neutron radiation DER: 0.01 … 104 μSv/h
Display range of pulse count rate of photon-ionizing radiation: 1 … 25 000 cps
Display range of pulse count rate of neutron radiation from the scintillation neutron detecting unit: 0.01 … 25 000 cps
Main relative permissible error limit when measuring photon-ionizing radiation DER from the scintillation detecting unit of photon-ionizing radiation at 0.95 confidence probability (137Cs)
(15+1/H*(10)) %, where H*(10) is a numeric value of measured DER in μSv/h
Main relative permissible error limit when measuring photon-ionizing radiation DER and DE from the Geiger-Muller counter at 0.95 confidence probability (137Cs)
15 %
Energy range of registered photon-ionizing radiation
0.02 … 3 MeV
Energy dependence of the device’s readings when measuring photon-ionizing radiation DER and DE in the energy range from 0.05 MeV to 1.25 MeV relative to 0.662 MeV energy (137Cs)
±25 %
Anisotropy of the detectors SGDU and GMC at incidence of gamma quanta at angles from +60о to -60о horizontally and vertically relative to the main measurement direction, marked by “+”:
- for 137Cs and 60Со isotopes: ±30 %
- for 241Am isotopes: ±75 %
Energy range of registered neutron radiation: 0.025 … 14·106 eV
Set-up time of the device operation, not more
min
Calibration time by the level of gamma background: 2 … 90 s
Response time to over 10 times change of photon-ionizing radiation DER: 0.25 s
Operating supply voltage: 3.7 V
Time of continuous operation of the device when powered from the charged lithium-polymer battery under background of gamma radiation no more than 0.5 μSv/h
- a switched-off display backlight, with no alarm triggering and a switched-off GPS receiver, no less: 200 h
- a switched-off display backlight, with no alarm triggering and a switched-on GPS receiver, no less: 55 h
Operating temperature range: -20 … +50 °С
Dimensions of the device with no clip (the clip included), no more: 67 × 128 × 30 (45) mm
Weight of the device, no more: 0.28 kg