Air Ionization Chamber Radiation Survey Meter
Introduction
The model 9-4 is a rugged air ionization chamber for performing beta-gamma radiation dose rate measurements over a 5 decade span ranging from background to 50 R/hr. The ion chamber automatically compensates for changes in temperature and pressure. 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 selector switch selects Off, x10K, X1K, X100, X10 and X1. Other controls include an on/off switch for a meter light, reset and battery test buttons and a zero adjustment knob.
The Model 9-4 is equipped with a serial interface for calibration. An optional calibration kit is available that supplies the necessary interface cable, software, calibration can, pressure pump and serial-to-USB converter.