Hokada RDa-170p Alpha/Beta Surface Contamination Monitor (Alpha: 0.01 – 2000 cps; Beta: 0.1 – 5000 cps)

Alpha/Beta Detector: ZnS-coated plastic scintillator, 170 cm² window (17 × 10 cm)

X/Gamma Detector: Energy-compensated GM tube (optional)

Measurement Units: cps, Bq, Bq/cm² for α/β; μSv/h or cps for γ

Alpha Background: < 3 cpm

Beta Background: < 15 cps (γ ≤ 0.2 μSv/h)

Alpha Efficiency: ≥ 30% (Am-241 or Pu-239, 2π)

Beta Efficiency: ≥ 30% (Tl-204 or Sr-90/Y-90, 2π)

Alpha Count Range: 0.01 – 2000 cps

Beta Count Range: 0.1 – 5000 cps

Inherent Error: ≤ ±20%

Gamma Dose Rate: 0.01 μSv/h – 10 mSv/h

Gamma Dose: 0.01 μGy – 9999.9 mSv

Gamma Inherent Error: -17% – 25%

Clock: Yes

Sampling: Timer adjustable

Sampling Mode: Statistical error parameter adjustable

Alpha Alarm: 1 – 2000 cps adjustable

Beta Alarm: 5 – 4000 cps adjustable

Gamma Alarm: 1 μSv/h – 10 mSv/h adjustable

Alarm Indication: Red LED and buzzer

Low Battery Alarm: Yes

Operating Temperature: -15 °C – 45 °C

Relative Humidity: 30% – 90% (at 30 °C)

Power Supply: Two AA 1.5 V or 1.2 V batteries

Weight: 0.9 kg

Dimensions: 160 × 130 × 290 mm (with handle)

High sensitivity intelligent portable instrument

For workbench, wall, floor, body surface and clothing α/β contamination measurement

Environmental X/γ dose rate monitoring

15 nuclide efficiencies for activity detection