Whole Body Contamination Monitor RZB-204


measurement of clothing, shoes and skin surface contamination with beta-active radionuclide, threshold exceeding alarm

Main features and functions:

  • two-step contamination measurement of all human body surface areas 
  • numerical and graphical measurement results representation, detailed data for every unit detector
  • alarm of preset thresholds exceeding or non-exceeding in form of graphical representation of all contaminated areas together with audio and voice messages
  • human actions during measurement are accompanied with voice commands
  • alarm threshold values are set separately for every channel
  • fixed or automatic measurement time setting
  • automatic unit detector sensitivity calibration
  • detector operation status, measurement parameters, sensitivity values for each measurement channel, and test data of unit operation modes can be displayed.
  • measurement results database recording, measurement protocol printing
  • small items monitoring
  • data transfer to electronic data carrier
  • unauthorized software access protection
  • self-testin

Performance specification


Plastic scintillation detectors RFD485 Fibre™

Measured beta energy window

0,10 ÷ 2,50 MeV

Measured surface beta particle flow density

1 ÷ 1·104 cm-2 · min-1

Detector sensitivity to  90Sr+90Y nuclide beta irradiation

not more than 1,5 pulses · s-1/part · сm-2 · min-1

Detector sensitivity to 60Co nuclide beta irradiation

not more than 0,3 pulses · s-1/part · сm-2 · min-1

Limiting permissible main error, P=0,95

±30 %

Limiting permissible additional relative error under gamma irradiation, P=0,95

±20 %

Operating temperature range

+5 to +45 °С

Operating pressure range

84 to 106,7 kPa

Operating humidity range

90 % at +35 °C

Protection index


Seismic stability

up to 7 points

Corresponds to 3N class requirements according to NP-001-97 (OPB-88/97)

Power supply

187÷242 V, 49÷51 Hz

Power consumption

not more than 161 VA

Average MTBF

not less than 20000 hours

Human height range

1,6÷2,1 m

Dimensions, weight


  • standard, without options 
  • 1000 х 1490 х 2290 mm; 430 kg
  • including "fixed head contamination monitoring" option 1000 х 1490 х 2450 mm; 500 kg
  • including "computer-aided head contamination monitoring" option 1000 х 1490 х 3099 mm; 500 kg
  • with optional sliding glass doors and/or barriers: 1000 х 1584 х 2290 mm; 500 kg
  • with "computer-aided head contamination monitoring" option, sliding glass doors and/or barriers: 1000 х 1584 х 3099 mm; 550 kg



  • including fixed head contamination monitoring option
  • including manual head contamination monitoring option
  • including computer-aided head contamination monitoring option
  • open unit
  • with side wall
  • with exit barrier
  • with exit sliding door
  • with entrance barrier and exit sliding door
  • with entrance and exit sliding doors
  • with entrance and exit barriers
  • A4-format document monitoring
  • with one beta detector
  • with two beta detectors
  • with one beta and one gamma detector
  • with two gamma detectors
  • whole body monitoring
  • chest monitoring
  • decorative panel