The chamber wall, including the instrument case, is 1000 mg/cm². A 1000 mg/cm² retractable beta shield allows beta measurement with a 7 mg/cm² window. The six-position switch selects Off, x10K, x1K, x100, x10 and x1. Each range has a front-panel, mounted calibration control. Other features include an audio output, reset, and zero adjust capabilities. Means are also provided to zero the electrometer leakage current.
Model 9-4: Same as Model 9-3, less audio output with added pressure compensation and PC controlled calibration.
- 5 Ranges from Background to 500 mSv/h (50 R/hr)
- 1000 mg/cm² Retractable Beta Shield
- Temperature Compensated
- Low Battery Warning
- High Background Zero Capability
- Proportional Audio Output