Geiger-Muller Tube

Thin mica window detects alpha, beta, and gamma radiation. Operating range is 450-600 volts, the recommended voltage is 500 volts. Recommended anode resistor: 10 megaohms. Gas filling. Neon and halogen. Measures .36" (9.1 mm) wide, 1.6" (40 mm) long.

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