"UDAS-04A" – a system for measuring the volumetric activity of radioactive gases in the air

Measurement range for the volumetric activity (VA) of beta-emitting nuclides, Bq/m³ — 5·10³ ÷ 3.7·10¹⁰
Energy range of detectable beta radiation, MeV — 0.05 ÷ 4
Limits of permissible relative error for VA measurements of beta-emitting nuclides, % — ±20
Volumetric flow rate of air drawn through the filter, L/min — 2.5 ÷ 65
Instability of instrument readings over 24 hours of continuous operation, % — 5
Minimum continuous operating time, h — 24
Maximum time to reach operating mode under constant external conditions, min — 10
Power supply: - voltage, V - frequency, Hz — 220 (+22/-33) | 50 (±3)
Power consumption (excluding the pump unit), V·A, maximum — 50
Overall dimensions, mm, maximum — 200 × 390 × 255
Weight, kg, maximum — 18

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