Hitachi ADB-1121 B(v)射线探测器（测试版）

Radiation Detected: Beta 
Detector: RUGGED SCINTI (Two in one, plastic scintillator + film)
Detection area: 19.6cm2 (φ5cm)
Instrument Efficiency 45%/2π±25% (33.8%/2π to 56.2%/2π) by 36Cl* 0.5cm between detector and source
Counting Rate Range : 0 to 10ks-1, 0 to 300kmin-1 (Reading in Bq/cm2 on TDC-9111)
Others: Switches to change time constant and save data, and LED lights
Weight: Approx. 270 g (excluding cable)