ガイガーミュラー管SI-22Gです。
Working Voltage 360-440V

Initial Voltage 285-335V

Recommended Operating Voltage 400V

Plateau Length 100V

Plateau Slope 0.125%/1V

Inherent Counter background(cps) 1.16pulse/s

Cobalt -60 Pulse Gamma Sensivity 540pulse/mkR

Interelectrode Capacitance 10pF

Lead Resistance 9-13Mohms

Working Temperature Range -50°+70°

Length 220mm

Diameter 19mm