Low Range Noble Gas Monitor UDGB-204

For supplies to the Russian Federation

Certificates:

Procedure:
Metrological certificate MVI №45540.8U135 dated 03.07.2008

Purpose:measurement of noble gas volumetric activity in air of rooms and ventilation system at NPPs, radiochemical plants and other radiation hazardous sites, where ionizing radiation sources are used

Low Range Noble Gas Monitor UDGB-204 (.pdf)

Main features and functions:

  • measurement of radioactive noble gas volumetric activity in air, and data display (depending on version) or data output via RS485
  • automatic gamma-background compensation
  • automatic self-testing, alarm signal generation, alarm signal display and alarm output via RS485
  • three alarm threshold levels (warning level and two emergency levels)
  • alarm of measured value "minor change"
  • "dry-contact" signal of threshold value is exceeded
  • standard (0...20mA / 4...20mA) analog output for measured data transfer to external systems
  • standard (0...20mA / 4...20mA) analog input for external device connection and its measured data consideration in algorithms
  • pumped air monitoring and consumption measurement
  • unified and replaceable components for all "RADSYS" system devices

Performance specification

Measurement range

lower limit: not more than 1,0×104 Bq/m3, for measurements lasting 0÷15 min.
3,7×103 Bq/m3, for round-the-clock measurement
upper limit: 3,7×1010 Bq/m3

Energy window

0,08 ÷ 2,00 MeV

Operating temperature range

0 to +55 °С

Operating pressure range

84,0 to 106,7 kPa 

Operating humidity range

up to 98 % at +35 °С

Relative error

50 %

Seismic stability

up to 8 points

Protection index

IP65

Dimensions and weight

DU: 212x360x338 mm; not more than 144 kg
LPU: 326х196х106 mm; not more than 4,5 kg
with frame: 784х725х420 mm; not more than 200 kg

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

Power supply

220 V

Power output

50 VA

Options

Power supply 24 V
Display and buzzer
Two two-step or one-step relays
Mounted at a frame with terminal block
Aerosol filter