A compact and rugged six-digit Geiger Counter, ideally suited for school and college radioactivity experiments. The LED digits shows counts per minute or continuous counting. An LED and an audible chirp signal indicate radioactivity. The internal 900/450 Vdc power supply provides the voltage required for PY1121 Geiger Muller Tubes (must be purchased separately). The front panel has a power switch and a mode selector switch for count rate or continuous counting. A push button resets the display. The rear panel has a tube voltage selector and an audio mute switch.
- Count Range: 99 counts/minute
- Time Base: 1 minute
- Count: Visual flash LED & audible chirp (switchable)
- Geiger Voltage: 900V or 450V dc
- Dimensions: 9.5 x 17 x 14cm